Contents
1995
Volume: 15 Issue 10
41 Article(s)
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Atmospheric Optics and Oceanic Optics
Adaptive Optics Phase Compensation for Nonlinear Thermal Blooming
[in Chinese], [in Chinese], and [in Chinese]
By using the four-dimensional propagation code including the model of a realistic adaptive optics system, adaptive optics phase compensation for nonlinear thermal blooming effects of the high energy laser them propagation in the atmosphere is numerical simulated. The phase compensation instability (PCI) characteristicsBy using the four-dimensional propagation code including the model of a realistic adaptive optics system, adaptive optics phase compensation for nonlinear thermal blooming effects of the high energy laser them propagation in the atmosphere is numerical simulated. The phase compensation instability (PCI) characteristics are analysed. The influence of the bandwidth (time delaying) and the deformable mirror interactuator spacing of the adaptive optics system on the phase compensation efficiency are discussed in detail..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1418 (1995)
Holography
3-D Surface Measurement Based on Digital Demodulation of Generalised Carrier Fringe Pattern
[in Chinese], [in Chinese], and [in Chinese]
A new technique for 3-D surface measurement is developed. The technique is based on digital demodulation of generalised non-linear carrier fringe pattern. Theoretical analysis and experimental result are given to demonstrate the technique.A new technique for 3-D surface measurement is developed. The technique is based on digital demodulation of generalised non-linear carrier fringe pattern. Theoretical analysis and experimental result are given to demonstrate the technique..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1385 (1995)
The Statistic Analysis and Evaluation About the Measurement of the Non-Stationary Speckle Field
[in Chinese], and [in Chinese]
In this paper, we discribe the relationship between the spacial average and the statistical average of the intensity of the non-stationary speckle field in order to analysis the testing and calculation problem about non-stationary field.In this paper, we discribe the relationship between the spacial average and the statistical average of the intensity of the non-stationary speckle field in order to analysis the testing and calculation problem about non-stationary field..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1389 (1995)
Storage Characteristics of Push-Pull Azobenzene Compounds
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
New push-pull azobenzene compound has been synthesized by diazocupling reaction, and the nonresonant longer wavelength optical storage of the azobenzene compound doped PMMA film was Performed. The excellent real-time and longer storage of image information are obtained when He-Ne laser is used as light source. The miniNew push-pull azobenzene compound has been synthesized by diazocupling reaction, and the nonresonant longer wavelength optical storage of the azobenzene compound doped PMMA film was Performed. The excellent real-time and longer storage of image information are obtained when He-Ne laser is used as light source. The minimum writing Power is less than 0. I w/cm2. The nonresonant storage mechanism is analyzed in this paper..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1394 (1995)
Application of Hit-Miss Transformation in Optical Holographic Associative Memory
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Using a morphological hit-miss transformation, an improved method for increasing the addressing accuracy of optical holographic associative memory is proposed and the experimental demonstration is given.Using a morphological hit-miss transformation, an improved method for increasing the addressing accuracy of optical holographic associative memory is proposed and the experimental demonstration is given..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1399 (1995)
Optical Implementations of the Fractional Fourier Transform Using Lenses
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The optical structures for implementation of the fractional Fourier transform were analyzed based on the theory of impulse response functions of the lens combination optical systems, and the meaning of the standard focal length was discussed. Several general optical setups were provided. By using these setups, the stanThe optical structures for implementation of the fractional Fourier transform were analyzed based on the theory of impulse response functions of the lens combination optical systems, and the meaning of the standard focal length was discussed. Several general optical setups were provided. By using these setups, the standard focal length can be adjusted easily. It will be significant for designing a spatial variant fliting system with multiple cascaded optical fractional Fourier transformers..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1404 (1995)
Negabinary-Coded Optical Parallel array Complex Operation
[in Chinese], [in Chinese], and [in Chinese]
A negabinary based algorithm including weighted-shifted addition and parallel array multiplication is suggested. On this basis, a two-stage array architecture is proposed to carry out complex operation. All the operations are performed without signs, carries,recodes and decimal point indications. Correspondingly, a parA negabinary based algorithm including weighted-shifted addition and parallel array multiplication is suggested. On this basis, a two-stage array architecture is proposed to carry out complex operation. All the operations are performed without signs, carries,recodes and decimal point indications. Correspondingly, a parallel optical experiment is demonstrated..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1409 (1995)
A New Method to OPto-Electronically Implement Fillly Bipolar WTA Model
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A new method to opto-electronically implement a fully bipolar WTA neural network model is proposed in this paper. The method has been applied to a WTA pattern recognition system and the experimental results are presented. This method permits more efficient use of the space-band product of the optical system, conveniencA new method to opto-electronically implement a fully bipolar WTA neural network model is proposed in this paper. The method has been applied to a WTA pattern recognition system and the experimental results are presented. This method permits more efficient use of the space-band product of the optical system, convenience for thresholding, error tolerance, higher storage capacity and better addressable ability as well as the ability to distinguish non-stored patterns..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1413 (1995)
Instrumentation, Measurement and Metrology
Experiment of Measuring Influence Function of Deformable Mirror Using Digital Interferometer
[in Chinese], [in Chinese], and [in Chinese]
In this paper the figure influence function of deformable mirror is discussed.In view of that the most useful wave front sensing methods are based on measuring the wayefront slopes, we propose to measure the slope influence function, by using which the wave front reconstruction matrix is composed. The method of measuriIn this paper the figure influence function of deformable mirror is discussed.In view of that the most useful wave front sensing methods are based on measuring the wayefront slopes, we propose to measure the slope influence function, by using which the wave front reconstruction matrix is composed. The method of measuring influence function of deformable mirror by digital interferometer is introduced. From the measured data, several parameters of influence function such as coupling, Gauss exponent and characteristic width can be obtained. The interferomtric results of slope influence function are compared with the measuring data from a H-S sensor..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1446 (1995)
Measurement of Verdet Constant for Fibers with Intrinsic Linear Birefringence
[in Chinese], and [in Chinese]
The small signal current sensitivity of twisted fibers is analyzed and calculated theoretically, and a new and more convenient method to measure the Verdet constant is proposed and verified experimentally. The results show that if the ratio of fiber twist rate and intrinsic linear birefringence is large than certain fiThe small signal current sensitivity of twisted fibers is analyzed and calculated theoretically, and a new and more convenient method to measure the Verdet constant is proposed and verified experimentally. The results show that if the ratio of fiber twist rate and intrinsic linear birefringence is large than certain figure the value of measured Verdet constant may quite close to the theoretical calculation. This method provides a new approch to measure the Verdet constant of conventional single mode optical fibers..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1452 (1995)
Lasers and Laser Optics
Optical Characteristics and Dynamic Stability of Gaussian Resonators with Thermal Lensing
[in Chinese], [in Chinese], and [in Chinese]
By analysing the optical matrix of Gaussian resonators with thermal lensing,we investigate the confinement condition and the transmission characteristics of Gaussian beam inside Gaussian resonators. The dynamic stability of Gausian resonators is evaluated by studying the dependence of dynamically changing parameters onBy analysing the optical matrix of Gaussian resonators with thermal lensing,we investigate the confinement condition and the transmission characteristics of Gaussian beam inside Gaussian resonators. The dynamic stability of Gausian resonators is evaluated by studying the dependence of dynamically changing parameters on varying refractive power of thermal lens..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1281 (1995)
LPE Growth of SCH LD with Ultra-Thin Active Layer
[in Chinese], [in Chinese], and [in Chinese]
The realization of SCH multilayer structure with ultra-thin GaAs active layer using a modified graphite boat system and low temperature technology is demonstrated.Our method utilizes thin solutions and saturation wafers to achive GaAs epituxial layer in the thickness of 25～35 nm which is uniform over relatively large aThe realization of SCH multilayer structure with ultra-thin GaAs active layer using a modified graphite boat system and low temperature technology is demonstrated.Our method utilizes thin solutions and saturation wafers to achive GaAs epituxial layer in the thickness of 25～35 nm which is uniform over relatively large area. Broad-contact LDs using the above mentioned epitaxial wafers are fabricated. These devices have threshold current density of 700～800 A/cm2 at room temperature..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1288 (1995)
Theoretical Analysis of a New Type of Free-Electron Laser without Inversion
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The principle of free-electron lasing without inversion is analysed theoretically and a new design with redoubled gain is given in this paper. Two deflect mirrors are arranged to make the electron of photon emission interfere constructively.The principle of free-electron lasing without inversion is analysed theoretically and a new design with redoubled gain is given in this paper. Two deflect mirrors are arranged to make the electron of photon emission interfere constructively..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1292 (1995)
Rate Equation Analysis of the Microcavity Laser
[in Chinese], [in Chinese], and [in Chinese]
The light output properties are described for a microcavity laser having dimensions on the order of the emitted wavelength. Analytic resolution of rate equation for the nonradiative depopulation not equal to zero is derived for the first times. The results show that increasing the coupling of spontaneous emission into The light output properties are described for a microcavity laser having dimensions on the order of the emitted wavelength. Analytic resolution of rate equation for the nonradiative depopulation not equal to zero is derived for the first times. The results show that increasing the coupling of spontaneous emission into the cavity mode causes the lasing properties becoming quite different from those of the conventional laser having cavity dimensions much larger than the lasing wavelength. In the closed microcavity of an ideal four-level laser system, when nonradiative depopulation is zero, the light output property of the microcavity laser is linearly. When nonradiative depopulation is not zero (in fact it is usually true), it is not linearly even for an ideal four-level laser system in the closed microcavity..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1297 (1995)
Laser Characteristics of Nd:S-VAP Crystal Pumped with Dye-Laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The absorption spectrum of a sort of new crystal Nd:S-VAP was measured,which showed that Nd:S-VAP is appropriately pumped at 583.0 nm and 809.0 nm. By using tunable dye-laser as pumping light, the performance of low threshold and high efficiency Nd:S-VAP laser has been realized. Up to 50% slop efficiency and down to 2 The absorption spectrum of a sort of new crystal Nd:S-VAP was measured,which showed that Nd:S-VAP is appropriately pumped at 583.0 nm and 809.0 nm. By using tunable dye-laser as pumping light, the performance of low threshold and high efficiency Nd:S-VAP laser has been realized. Up to 50% slop efficiency and down to 2 mJ threshold energy were obtained. The center wavelength of frequency-doubling laser is 536.0 nm and the emission linewidth is 1.4 nm. In addition, the prospect application of Nd:S-VAP crystal for low threshold, high efficiency miniature laser pumped with LD was disscussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1302 (1995)
Investigation on Polarization Characteristics of Travelling-Wave Semiconductor Optical Amplifier
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The polarization characteristics of Travelling-wave semiconductor optical amplifier (TW-SOA) is investigated based on th gain property of active Fabry-Perot resonator. Theoretical analysis and experimental research of polarization sensitivity is presented including the influences of residual facet reflectivities, gain The polarization characteristics of Travelling-wave semiconductor optical amplifier (TW-SOA) is investigated based on th gain property of active Fabry-Perot resonator. Theoretical analysis and experimental research of polarization sensitivity is presented including the influences of residual facet reflectivities, gain coefficient, optical mode confinement factors, etc. Some improving methods for polarization sensitivity are discussed according to the analysis and a novel polarization insensitive TW-SOA is proposed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1306 (1995)
Materials
Optical Properties of GeO2-Sb22O3-K22O Hollow-Core Optical Fiber Material
[in Chinese], [in Chinese], and [in Chinese]
This paper systematically studies the GeO2-Sb2O3-K2O glass hollow-core fiber material used for transmitting CO2 laser. By theoretical calculation, the wave-length range and K value at nr<1, as well as loss coefficient, a=0.05 dB/m have been obtained. The relationship between loss and frequency at HE11, TM01 and TE01This paper systematically studies the GeO2-Sb2O3-K2O glass hollow-core fiber material used for transmitting CO2 laser. By theoretical calculation, the wave-length range and K value at nr<1, as well as loss coefficient, a=0.05 dB/m have been obtained. The relationship between loss and frequency at HE11, TM01 and TE01 modes has been discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1423 (1995)
Laser Induced Damage of Glass Surface
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
This paper describes the investigation of damage of glass surfaces by high power laser beam. Surface damage thresholds for K8 glass are measured for 250 ps laser pulse at near normal incidence. The difference between the entrance and exit thresholds is briefly explained.This paper describes the investigation of damage of glass surfaces by high power laser beam. Surface damage thresholds for K8 glass are measured for 250 ps laser pulse at near normal incidence. The difference between the entrance and exit thresholds is briefly explained..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1428 (1995)
Nonlinear Optics
Optical Nonlinearities Induced by Anharmonic Vibration of Ionic Lattice and Increasing Absorption Optical Bistability
[in Chinese], [in Chinese], and [in Chinese]
This paper deals with the intracavity interaction of lightfield with anharmonic lattice vibration of ionic crystal. The nonlinear lattice dynamics and an expression of nonlinear macroscopic polarization are derived in terms of optic phonon modes. Under rotating wave approximation, the total coherent Hamiltonian of photThis paper deals with the intracavity interaction of lightfield with anharmonic lattice vibration of ionic crystal. The nonlinear lattice dynamics and an expression of nonlinear macroscopic polarization are derived in terms of optic phonon modes. Under rotating wave approximation, the total coherent Hamiltonian of photon-phonon coupling system driven by incident field is introduced. By the corresponding equations of steady state, the increasing absorption optical bistability (IAOB), as a nonlinear effect, is demonstrated. The results show that the nonlinear interaction of light field with various elementary excitations of boson type, such as photon and exciton, may be served as a mechanism for IAOB..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1311 (1995)
Studies on Material Longitudinal Relaxation with Population Grating Excited by Incoherent Light
[in Chinese], [in Chinese], and [in Chinese]
In this paper, the principle and key techniques for the studies on material longitudinalrelaxation with incoherent light time-delayed four-wave mixing are presented. The longitudinal relaxation times of some dyes are measured experimentally and the results are discussed.In this paper, the principle and key techniques for the studies on material longitudinalrelaxation with incoherent light time-delayed four-wave mixing are presented. The longitudinal relaxation times of some dyes are measured experimentally and the results are discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1318 (1995)
Femtosecond Nonlinear Response of Polymer Film Doped with Nanometer-Sized PbS Clusters
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We have synthesized nanometer-sized PbS clusters embedded in a new kind of polymer(Flemion) film. Their linear optical absorption spectrum was blue-shift from the bulk band-gap but no exciton peaks are abaerved. Using femtosecond laser pulses, we have recorded the time-resolved Kerr transmission signals of the films, fWe have synthesized nanometer-sized PbS clusters embedded in a new kind of polymer(Flemion) film. Their linear optical absorption spectrum was blue-shift from the bulk band-gap but no exciton peaks are abaerved. Using femtosecond laser pulses, we have recorded the time-resolved Kerr transmission signals of the films, from which we got the third-order nonlinear susceptibility and response time. The experimental data are discussed in terms of the quantum confined effect..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1324 (1995)
Impact of Coupling Effect to Relativistic Third Harmonic Generation
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The nonlinearity of laser field induced by relativistic effect and its influence and harmonic generation are investigated. The variations of amplitude, phase and efficiency of third harmonic content are analyzed by taling into account the coupling among harmonics of different orders, the growth and saturation of third The nonlinearity of laser field induced by relativistic effect and its influence and harmonic generation are investigated. The variations of amplitude, phase and efficiency of third harmonic content are analyzed by taling into account the coupling among harmonics of different orders, the growth and saturation of third harmonic wave are also described. Results show the coupling effect can decrease the amplitude and effciency of relativistic harmonic radiation for the long laser pulse limit..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1329 (1995)
Two-Photon Resonant Three-Photon Ionization and Two-Photon Hybrid Resonant Three-Photon Ionization in Na2-Na
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
By two-photon resonant three-photon ionization and two-photon hybrid resonant three-photon ionization in Na2-Na, the ion current time decay curve was measured. From the relation between ion current and multiphoton dynamic parameters photon-ionization cross-section of 4D state in atomic sodium was determined.By two-photon resonant three-photon ionization and two-photon hybrid resonant three-photon ionization in Na2-Na, the ion current time decay curve was measured. From the relation between ion current and multiphoton dynamic parameters photon-ionization cross-section of 4D state in atomic sodium was determined..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1333 (1995)
Langevin Theory of a Λ-Type Two-Mode Laser
[in Chinese]
Mode coupling of a Λ-type two-mode laser operating near above threshold is discussed via Langevin quantum theory. Characteristics of coupling can be have not only mutual decrease and mutual increase but also being increased of one mode and being simultaneously decreased of the other, and both not being increased and noMode coupling of a Λ-type two-mode laser operating near above threshold is discussed via Langevin quantum theory. Characteristics of coupling can be have not only mutual decrease and mutual increase but also being increased of one mode and being simultaneously decreased of the other, and both not being increased and not being decreased of either or the two modes. The characteristics depend both on the detunings of the two modes and on the initial populations of three atomic levels..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1337 (1995)
Experimental Study on Ultrafast Optical Kerr Effect in Poly (2, 5-Thienylene Vinylene)
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The ultrafast resonant optical Kerr effect has been experimentally studied in Poly (2, 5-Thienylene Vinylene) film. A optical Kerr susceptibility X of 3 × 10-11 esu was obtained. A bimolecular decay is used to explain the dependence of dynamics of the Kerr signal on the incident light intensity.The ultrafast resonant optical Kerr effect has been experimentally studied in Poly (2, 5-Thienylene Vinylene) film. A optical Kerr susceptibility X of 3 × 10-11 esu was obtained. A bimolecular decay is used to explain the dependence of dynamics of the Kerr signal on the incident light intensity..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1342 (1995)
Study of Second-Order Nonlinear Optics for Stilbazium Salt Langmuir-Blodgett Monolayer at Different Surface Pressure
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Second- harmonic generation (SHG ) of stilbazium salt Langmir-Blodgett monolayer at different surface pressure was measured. We got the enhanced SHG signal at low surface pressure. Refering to surface pressure-area isotherm and the transparent spectra of stilbszium salt we got following results. The stilbazium salt on Second- harmonic generation (SHG ) of stilbazium salt Langmir-Blodgett monolayer at different surface pressure was measured. We got the enhanced SHG signal at low surface pressure. Refering to surface pressure-area isotherm and the transparent spectra of stilbszium salt we got following results. The stilbazium salt on LB film was in the form of solid state. The absorption peak 351 nm of the solid aggregation at the low surface pressure led to resonant-enhancement of the fourth order nonlinear optical susecptibility Ｘ(4)(—2ω:ω,ω,ω,—ω) which gives an effecton to SHG signal..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1346 (1995)
Competition Between Stimulated Dynamic Light Scattering and Stimulated Raman Scattering in Liquid-core Waveguide
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Competition between stimulated dynamic light scattering (SDLS) and stimulated Raman scattering (SRS) in CS2 liquid-core waveguide is studied by timeresolved pump pulse duration and pump density dependent experiments. It is found that the threshold of SDLS is dependent on the pump pulse duration. The competition betweenCompetition between stimulated dynamic light scattering (SDLS) and stimulated Raman scattering (SRS) in CS2 liquid-core waveguide is studied by timeresolved pump pulse duration and pump density dependent experiments. It is found that the threshold of SDLS is dependent on the pump pulse duration. The competition between SDLS and SRS implies that SDLS consists of two contributions, one relates to the increasing rate of transient pump power density at the rise-time of pump pulse;the other relates to the transient pump power density, and dominates around the peak of high density pump pulse. Their mechanism is discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1351 (1995)
Physical Optics
Numerical Modelling of Lossy Nonlinear Slab-Guided Waves
[in Chinese], and [in Chinese]
A numerical approach based on the finite element method is developed for the analysis of lossy nonlinear optical waves guided by planar nonlinear waveguiding structures containing arbitrary lossy materials. In this approach, the power-dependent complex propagation constants and the local electromagnetic field distributA numerical approach based on the finite element method is developed for the analysis of lossy nonlinear optical waves guided by planar nonlinear waveguiding structures containing arbitrary lossy materials. In this approach, the power-dependent complex propagation constants and the local electromagnetic field distributions, for both TE and TM waves, are obtained directly from the given lossy nonlinear waveguides. In particular, for the TM case, the biaxial nature of nonlinear refractive index is considered without any approximation. The power-dependent complex dispersion relations for TE and TM waves in a lossy nonlinear guiding system with a wide range of absorption coefficients are simulated and analyzed. It is shown that the complex dispersion relations, for both TE and TM waves, are strongly power dependent and most importantly, the bistability phenomena will no longer exist if the absorptive loss is high enough..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1432 (1995)
Transverse Shift of Reflected and Refracted Electromagnetic Waves
[in Chinese]
A formula for the transverse shift of the centre of energy of the reflected and refracted electromgnetic waves on the interface of dielectric media is derived. It shows that the value of transverse shift depends on the dimension of the incident wavebeam, the angle of incidence, the dielectric permittivities and the magA formula for the transverse shift of the centre of energy of the reflected and refracted electromgnetic waves on the interface of dielectric media is derived. It shows that the value of transverse shift depends on the dimension of the incident wavebeam, the angle of incidence, the dielectric permittivities and the magnetic conductivities of media..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1437 (1995)
A New Design of Soft X-Ray Transmission-Blazed Grating with Ultrahigh Density (105l/mm)
[in Chinese], and [in Chinese]
A new method of fabricating transmission-blazed grating with period' s thickness of 10 nm or below by magnetron sputtering is proposed for the first time. The transmission-blazed grating model based on total reflection by inner interfaces is presented. Two examples of this grating used in water window are given, foA new method of fabricating transmission-blazed grating with period' s thickness of 10 nm or below by magnetron sputtering is proposed for the first time. The transmission-blazed grating model based on total reflection by inner interfaces is presented. Two examples of this grating used in water window are given, for example, angular dispersivie power 5.7 deg./nm; energy resolution λ/△λ≈104. LiF and LiBO2 etc. with high transmissivty are considered suitable for the grating' spacer material. Possible applications are discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1441 (1995)
Quantum Optics
Nondegenerate Two-Photon Interaction of SU(2) Coherent State with a Two-Level Atom
[in Chinese], [in Chinese], and [in Chinese]
In this paper, we studied the nondegenerate two-photon interaction of SU(2) coherent state with a two-level atom in a cavity, and discussed the influence of the anticorrelation property of SU(2) coherent state on the atomic dynamic behavior. The time evolution of the quantum statistics properties of the light field is In this paper, we studied the nondegenerate two-photon interaction of SU(2) coherent state with a two-level atom in a cavity, and discussed the influence of the anticorrelation property of SU(2) coherent state on the atomic dynamic behavior. The time evolution of the quantum statistics properties of the light field is also discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1365 (1995)
The Quantum Dynamic Properties of Two Two-Level Atoms and Its Radiation Field
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The quantum dynamic properties of atomic level occupation probability and its radiation field are studied by the quatised trestment, and the influence of atomic coupling and exciting field on the aforementioned properties is discussed in detail. The relation between the coupling of two atoms and the interaction of atomThe quantum dynamic properties of atomic level occupation probability and its radiation field are studied by the quatised trestment, and the influence of atomic coupling and exciting field on the aforementioned properties is discussed in detail. The relation between the coupling of two atoms and the interaction of atom-cavity is revealed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1371 (1995)
Properties of the Phase Evolution of an Initially Squeezed Vacuum in the J-C Model
[in Chinese], and [in Chinese]
The properties of the phase evolution of an initially squeezed vacuum in the Jaynes-Cummings model are studied by using the Pegg-Barnett phase theory. The phase probability distribution and variance are calculated for weal squeezing. The curres of evolution of the phas probability distribution are given on a polar diagThe properties of the phase evolution of an initially squeezed vacuum in the Jaynes-Cummings model are studied by using the Pegg-Barnett phase theory. The phase probability distribution and variance are calculated for weal squeezing. The curres of evolution of the phas probability distribution are given on a polar diagram. The influenses of an atom interacting with squeezed vacuum on the phase properties are discused..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1375 (1995)
Quantum Non-Demolition Measurement for an Exactly-Solvable Model of Atom-Light Field in Adiabatic Limits
[in Chinese], and [in Chinese]
An exactly-solvable model for quantum non-demolition measurement (QNDM) of the momentum of atomic mass-center is studied with the discussions about the conditions and the dynamic process for this QNDM. It is shown in this paper that the adiabatic conditions are necessary for the realization of this kind of QNDM. FinallAn exactly-solvable model for quantum non-demolition measurement (QNDM) of the momentum of atomic mass-center is studied with the discussions about the conditions and the dynamic process for this QNDM. It is shown in this paper that the adiabatic conditions are necessary for the realization of this kind of QNDM. Finally, the relations between the QNDM and the picture in quantum mechanics is analyzd for this model..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1380 (1995)
Rapid Communications
Bi-Cell Detector Algorithm for Calculating Misalignment
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A unique alignment algorithm-hi-cell algorithm is presented. With the alignment scan curve generated from the dark field alignment system, a bi-cell detector implemented in software is used for calculating the misalignment. In the bi-cell detector algorithm the symmetry point over the alignment scan curve is calculatedA unique alignment algorithm-hi-cell algorithm is presented. With the alignment scan curve generated from the dark field alignment system, a bi-cell detector implemented in software is used for calculating the misalignment. In the bi-cell detector algorithm the symmetry point over the alignment scan curve is calculated as the ideal alignment point instead of the peak value point or other characteristic value point. Results show that the alignment accuracy better than 0.11 μm (3σ) can be obtained. The princi.
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1458 (1995)
Electron-Trapping Mechanism of Sm:Cas
[in Chinese]
After exposed to ultraviolet light, the strong infrared optically stimulated luminescence was obsered in CaS singly doped with Sm. It is result from the electron transfer between Sm ions at different sites. The optical spectral properties and electrontrapping mechanism of Sm: Cas are reported in this paper.After exposed to ultraviolet light, the strong infrared optically stimulated luminescence was obsered in CaS singly doped with Sm. It is result from the electron transfer between Sm ions at different sites. The optical spectral properties and electrontrapping mechanism of Sm: Cas are reported in this paper..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1463 (1995)
Study on OPtical Propertics of (Ti, Al)N Films
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The optical properties of (Ti, Al)N thin film have been studied and the transmission and reflection spectra have been analysed carefully. Using Hadley equations, the optical constants, n-refractive index, k-extinction coefficient of (Ti, Al)N films were determined. According to the transmission spectrum of (Ti, Al)N fiThe optical properties of (Ti, Al)N thin film have been studied and the transmission and reflection spectra have been analysed carefully. Using Hadley equations, the optical constants, n-refractive index, k-extinction coefficient of (Ti, Al)N films were determined. According to the transmission spectrum of (Ti, Al)N film, the optical gap energy of (Ti, Al)N film was calculated..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1467 (1995)
[in Chinese]
[in Chinese], and [in Chinese]
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1471 (1995)
Spectroscopy
The Infrared Vibrational Characteristics of SnO2Nanoparticles Capped with a Layer of Anionic Surfactant
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The infrared absorption spectra are measured for both the bare SnO2 nanoparticles and the SnO2 nanoparticles capped with a layer of anionic surfactant.A background absorption band of its intensity increasing with frequency for the capped SnO2 was observed and explained.The infrared absorption spectra are measured for both the bare SnO2 nanoparticles and the SnO2 nanoparticles capped with a layer of anionic surfactant.A background absorption band of its intensity increasing with frequency for the capped SnO2 was observed and explained..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1355 (1995)
Photoionization Efficiency Spectra of Benzene by Synchrotron Radiation
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The photoionization mass spectra and photoionization efficiency spectra are studied by using synchrotron radiation at the photochemistry station of Hefei National Synchrotron Radiation Laboratory. The ionization potential of benzene and appearance potential of its main fragments are obtained from photoionization efficiThe photoionization mass spectra and photoionization efficiency spectra are studied by using synchrotron radiation at the photochemistry station of Hefei National Synchrotron Radiation Laboratory. The ionization potential of benzene and appearance potential of its main fragments are obtained from photoionization efficiency spectra. The dissociation energies of benzene ions are reported for the first time..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1359 (1995)
Spectral Resolution of Time-Delayed Laser-Induced Double Gratings
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We have studied the spectral resolution of the time-delayed laser-induced double gratings used for measuring the frequency difference between two lights. The condition for the occurence of the FWM signal modulation is established when the pump beams have Gaussian lineshape, which has been verified experimentally througWe have studied the spectral resolution of the time-delayed laser-induced double gratings used for measuring the frequency difference between two lights. The condition for the occurence of the FWM signal modulation is established when the pump beams have Gaussian lineshape, which has been verified experimentally through the study of beating between a tunable narrow-band laser beam and a broadband laser beam..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 10, 1362 (1995)
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