Contents
1994
Volume: 14 Issue 6
22 Article(s)
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Fiber Optics and Optical Communications
Fabrication of Silicon-Based GeSi Alloy Optical Waveguides
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The new development in silicon optical integration, and the design andprocesses of fabricating GeSi/Si single-mode rib waveguide at the wavelength λ=1.3 μm is reported. The propagating loss of the waveguide has reached 0.7 dB/cm. The heightand width of the waveguide are 4～8 μm and 8～12 μm respectively. The size of themThe new development in silicon optical integration, and the design andprocesses of fabricating GeSi/Si single-mode rib waveguide at the wavelength λ=1.3 μm is reported. The propagating loss of the waveguide has reached 0.7 dB/cm. The heightand width of the waveguide are 4～8 μm and 8～12 μm respectively. The size of themare comparable to those of single-mode fibre cores. Besides, the numerical aperture of thewaveguide at the ends are also matched to the fibre. The fabricated waveguide meets allthe demands of silicon optical integration. Finally, the single mode outputs from a Y-power-divider prepared by the GeSi-Si rib waveguides discribed above is shown..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 603 (1994)
Guided Modes in a Helical Fiber
[in Chinese]
Based on the wave equation, we directly analysis the guided modes in a helical fiber with circular cross-section and arbitrary profile of the refractive index in localco ordinate system. Two important results are obtained: (1) The guided modes in a helical fiber are right-rotated or left-rotated circularly polarised moBased on the wave equation, we directly analysis the guided modes in a helical fiber with circular cross-section and arbitrary profile of the refractive index in localco ordinate system. Two important results are obtained: (1) The guided modes in a helical fiber are right-rotated or left-rotated circularly polarised modes. (2) There don't exist TE and TM modes in a helical fiber. The theoretical results agree with that of the available experimental measurements..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 608 (1994)
Modes in Planar Optical Waveguide with Second Order Polynomial Models
[in Chinese], and [in Chinese]
For the planar optical waveguide with second order polynomial index profile, the wave equation is solved by means of first order perturbational method in this paper, and analytical solution of mode field and mode dispersion equations are oblained in terms of Airy functions. The propagation constauts are calculated by tFor the planar optical waveguide with second order polynomial index profile, the wave equation is solved by means of first order perturbational method in this paper, and analytical solution of mode field and mode dispersion equations are oblained in terms of Airy functions. The propagation constauts are calculated by the first order perturbational approximation and compered to experimental values. The calculated propagation constants agree quite well with measured ones..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 612 (1994)
Fourier Optics and Signal Processing
Phase Distribution Evaluation of Time Dependent Holographic Fringe Pattern by Dual Fringe Patterns Phase Shifting Interferometry
[in Chinese], and [in Chinese]
This peper presents how a new and simple technique refered as to Dual Fringe Patterns Phase Shifting Interferometry to be used in holography interferometry for automated phase evaluation of time dependent problem. The novel feature of the technique is that two fringe patterns with exactly desired phase shift can be obtThis peper presents how a new and simple technique refered as to Dual Fringe Patterns Phase Shifting Interferometry to be used in holography interferometry for automated phase evaluation of time dependent problem. The novel feature of the technique is that two fringe patterns with exactly desired phase shift can be obtained simultaneousely. Although, the phase distribution of the two fringe patterns could vary with respect to time due to the effect of environmental disturbance, the phase shift between them is fixed. The technique is based on the combination of spliting fringe pattern, polarization phase shifting and two dimensional digital FFT schemes..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 616 (1994)
A Vector Modal Theory for Perfectly-Conducting Rectangular-Aperture Grating
[in Chinese], [in Chinese], and [in Chinese]
The vector wave functions satisfying vector homogeneous Helmholtz equation are introduced as the basic vectors, and the fields both outside and inside the apertures of the grating are expanded by vector plane wave functions and vector modes respectively. Applying the field coupling conditions, the diffraction equationsThe vector wave functions satisfying vector homogeneous Helmholtz equation are introduced as the basic vectors, and the fields both outside and inside the apertures of the grating are expanded by vector plane wave functions and vector modes respectively. Applying the field coupling conditions, the diffraction equations for the amplitudes are derived. The method can be used to study the diffraction of optical plane waves with arbitrary incident direction and polarization..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 621 (1994)
Information Distribution of Wiener Spectrum of Double Exposure Specklegrams in Lateral Displacement Measurement Young's Fringe Patterns on Displacements and Speckle Contrast
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
In this paper, the information characteristics of the Wiener spectrum of a double exposure specklegram have been discussed. As an example, the general expressions of Young' s fringe patterns are obtained. We have analysed the fringe visibility and its dependence on the nature of the deformation and displacement of In this paper, the information characteristics of the Wiener spectrum of a double exposure specklegram have been discussed. As an example, the general expressions of Young' s fringe patterns are obtained. We have analysed the fringe visibility and its dependence on the nature of the deformation and displacement of the specinaen and on theextent of laser beam illuminated area on the specklegrams. The maximum number of visible fringes has been derived. Finally, diffraction halo brightness and it dependence on the extent of laser beam illuminated area on the specklegrams. The maximum number of visible fringes has been derived. Finally, diffraction halo brightness and it dependence on the contrast of speckles have been given..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 626 (1994)
Image Blurring Allowance of Digital Intensity Correlation Metering in the Case of Slant Optical Axis
[in Chinese], and [in Chinese]
Allowing for CCD resolution, the authors have investigated in detail the image blurring allowance of digital intensity correlation metering in the case of slant optical axis. The maximum image blurring allowances caused by both the out-plane displacement, deformation and the tilt have been presented.Allowing for CCD resolution, the authors have investigated in detail the image blurring allowance of digital intensity correlation metering in the case of slant optical axis. The maximum image blurring allowances caused by both the out-plane displacement, deformation and the tilt have been presented..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 632 (1994)
Lasers and Laser Optics
Radiation Time Property for Cavity Target Heated by Laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The study of radiation time property for cavity target heated by laser is reported. Laser wavelength of 1.053 μm, energy 30～750 J, pulse wideth 600～1100 ps with Gaussian shape are used to the target. The radiation time property of the source region are measured by two sub-keV X-ray energy specttometers respectively thrThe study of radiation time property for cavity target heated by laser is reported. Laser wavelength of 1.053 μm, energy 30～750 J, pulse wideth 600～1100 ps with Gaussian shape are used to the target. The radiation time property of the source region are measured by two sub-keV X-ray energy specttometers respectively through laser incidence hole and X-ray transmission hole. The emission X-ray time history of source region and the relation of pulse width with emission hole area, hole shape,emission energy region and laser irradiation intensity et al. are given..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 561 (1994)
A Study of Transform Function Model of Multiple Temporal-Spatial Variables Adaptive High Energy Laser Resonator
[in Chinese], and [in Chinese]
A mathematical model of the optical resonator of high energy laser is set up inthis paper specially for the unstable resonator of high energy laser by using the method ofmatrix transmission optics combining with diffraction integral equation. The results ofcomputer simulation show that the model is correct and some impA mathematical model of the optical resonator of high energy laser is set up inthis paper specially for the unstable resonator of high energy laser by using the method ofmatrix transmission optics combining with diffraction integral equation. The results ofcomputer simulation show that the model is correct and some important results areachieved..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 568 (1994)
Influence of Gas Comosition on Discharge State in TEA CO2Laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The gas composition during discharge process in TEA CO2 laser has been measured using a realtime system built by us and a four-pole mass spectrometer.Influence of the gas composition on the discharge state in TEA CO2 laser has beenanalyzed.The gas composition during discharge process in TEA CO2 laser has been measured using a realtime system built by us and a four-pole mass spectrometer.Influence of the gas composition on the discharge state in TEA CO2 laser has beenanalyzed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 574 (1994)
High-Power Tunable CW NaCl:(F+2)HColor Center Lasers
[in Chinese]
The recent experimental results of (F+2). color center laser are reported inNaCl crystal doped with sulfur and oxygen ions. The maximum power of 3 W and 4.8 W has been obtained with F+2:S-- and F+2:O-- centers respectively. The thermal andoptical stability of F+2:S-- and F+2:O-- centers compared experimentally.The recent experimental results of (F+2). color center laser are reported inNaCl crystal doped with sulfur and oxygen ions. The maximum power of 3 W and 4.8 W has been obtained with F+2:S-- and F+2:O-- centers respectively. The thermal andoptical stability of F+2:S-- and F+2:O-- centers compared experimentally..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 579 (1994)
Nonlinear Optics
Mirrorless Optical Bistability due to Reverse Saturation Absorption
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Mirrorless transient optical bistubility due to reverse saturation absorption inorganic materials has been studied. Optical bistubility loops have been obtained fromtheoretical calculation for copper pothalocyanine (CuPc). Increasing absorption opticalbistability has been abserved in CuPc solutions. Theory and experimeMirrorless transient optical bistubility due to reverse saturation absorption inorganic materials has been studied. Optical bistubility loops have been obtained fromtheoretical calculation for copper pothalocyanine (CuPc). Increasing absorption opticalbistability has been abserved in CuPc solutions. Theory and experiments show goodagreement..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 595 (1994)
The Properties of Amplitude High Power Squeezing of Odd and Even Coherent Superposition States
[in Chinese], [in Chinese], and [in Chinese]
In this Paper, the new orthonormalization eigenstates of the four-power of thephoton annihilation operator a4 are introduced, which are odd, even coherent states andodd, even coherent superposition states. And the properties of amplitude high powersqueezing of the odd and even coherent superposition states are studied.In this Paper, the new orthonormalization eigenstates of the four-power of thephoton annihilation operator a4 are introduced, which are odd, even coherent states andodd, even coherent superposition states. And the properties of amplitude high powersqueezing of the odd and even coherent superposition states are studied..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 599 (1994)
Optical Design and Fabrication
Analysis and Control of Narcissus Effect in Scanning Infrared Systems
[in Chinese], and [in Chinese]
A fast analysis method for the Narcissus effect based on pseudo-paraxial raytracing is proposed. The definitions and tracing formulae for the pseudo-paraxial rays are given. The Narcissus induced temperature reduction for the axial point and the Narcissus induced temperature variation over the field can then be calculaA fast analysis method for the Narcissus effect based on pseudo-paraxial raytracing is proposed. The definitions and tracing formulae for the pseudo-paraxial rays are given. The Narcissus induced temperature reduction for the axial point and the Narcissus induced temperature variation over the field can then be calculated. Different methods of reducing the Narcissus effect during automatic design of the optical system are discussed. All the analyses and controls are implemented in the GOSA (General Optical System Analysis and optimization) program developed at Beijing Institute of Technology..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 650 (1994)
Optical Devices
An Efficient Approach to Improve Discrmination for Synthetic Discriminant Function
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We propose a method to improve discrimination for synthetic discrimination function (SDF), which is carried out by training the complementary samples under the condition of zero correlation peaks while the samples under the condition of equal correlation pobs. Therefore, the distances between the trained class and all We propose a method to improve discrimination for synthetic discrimination function (SDF), which is carried out by training the complementary samples under the condition of zero correlation peaks while the samples under the condition of equal correlation pobs. Therefore, the distances between the trained class and all other classes are increased in the decision space and high discrimination is resulted from. On the other hand, the advantage of the distortion-invariant recognition for synthetic discrimination function is kept as well. Experimental results related to fingerprint identification are given..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 656 (1994)
Investigation for Ta2O5Planer Waveguide Humidity sensors
[in Chinese], [in Chinese], and [in Chinese]
The concept of optical waveguide sensors and its fabrication are described;Based on the experiment and the measurement results, the Ta2O5 waveguide humiditysensors are analyzed, including the mechanism, configuration and characteristics.The concept of optical waveguide sensors and its fabrication are described;Based on the experiment and the measurement results, the Ta2O5 waveguide humiditysensors are analyzed, including the mechanism, configuration and characteristics..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 662 (1994)
Physical Optics
Probability Distribution of Beam-Centre Wanders of Laser Beam in Atmosphere
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The probability distribution of the beam-centre wanders and the probability distribution of the fluctuating average intensity measured by the point-aperture and caused by beam wander have been studied by using the probability theroy for laser beam propagation in a turbulent atmosphere. The resultS shown, the probabilitThe probability distribution of the beam-centre wanders and the probability distribution of the fluctuating average intensity measured by the point-aperture and caused by beam wander have been studied by using the probability theroy for laser beam propagation in a turbulent atmosphere. The resultS shown, the probability distribution of the two-dimension beam wandrs obeys Rician distribution, and the probability distribution of the average intensity fluctuations measured by the point-aperture satisfies Gamma distribution..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 636 (1994)
Spectroscopy
Spectral Properties of Ho3+in ZBLAN glass
[in Chinese], [in Chinese], and [in Chinese]
The excitation and emission spectra of H03+ ions in ZBLAN glasses weremeasured. The oscillator strength, rediative probabilities and the stimulated cross sectionsof Ho3+ ions in ZBLAN were calculated. The effect of ion concentration on luminescenceand lifetime of H03+ ions in this host were studied in detail.The excitation and emission spectra of H03+ ions in ZBLAN glasses weremeasured. The oscillator strength, rediative probabilities and the stimulated cross sectionsof Ho3+ ions in ZBLAN were calculated. The effect of ion concentration on luminescenceand lifetime of H03+ ions in this host were studied in detail..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 583 (1994)
Photon-Gated Spectral Hole Buming in Zn Tetrabenzoporphin-Crotonic Acid/Phenoxy Resin System
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We have developed a new material system for the photon-gated hole burning:Zn-tetrabenzoporphin crotonic acid phenoxy resin, carried out various experiments forthe material and have a series of photon-gated holes at different wavelengthes with in aninhomogenously broadened absorption band at temperature of 20 K. We alsoWe have developed a new material system for the photon-gated hole burning:Zn-tetrabenzoporphin crotonic acid phenoxy resin, carried out various experiments forthe material and have a series of photon-gated holes at different wavelengthes with in aninhomogenously broadened absorption band at temperature of 20 K. We also dis cussrelative subjectes in some derail, such as, temperature affect, on hole, the hole lifetime,the photo-erasable performence of burnt holes, and the gating ratio G..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 589 (1994)
Thin Films
Development and Optical Performance of Soft X-ray Multilayer Phase Laminar Grating
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The developement and characterization of soft X-ray multilayer phase laminargrating are given detailly. The optical performance was measured at Beijing SynchrotronRadiation Facility, the results are discussed and analysised.The developement and characterization of soft X-ray multilayer phase laminargrating are given detailly. The optical performance was measured at Beijing SynchrotronRadiation Facility, the results are discussed and analysised..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 642 (1994)
Nonspecular Longitudinal Shift of the Beam Reflected From an Interface Containing Absorbing Medium
[in Chinese], [in Chinese], and [in Chinese]
Two expressions presented in this paper may be employed to calculate the value of longitudinal focal displacement of the reflected beam from an absorbing medium for both s and p polarization. Our calculations show that Fp is positive (p-wave shifts alongthe reflected direction), and Fs is negative (s-wave shifts along Two expressions presented in this paper may be employed to calculate the value of longitudinal focal displacement of the reflected beam from an absorbing medium for both s and p polarization. Our calculations show that Fp is positive (p-wave shifts alongthe reflected direction), and Fs is negative (s-wave shifts along the oppositive). Assuming that the extinction coefficient equals to zero, the two expressions can be simplified to the forms given by C. C. Chan and T. Tamir which fit only for the non-absorbing medium..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 646 (1994)
Vision, Color, and Visual Optics
Experimental Correction of the CIELUV System
[in Chinese]
A new experiment was carried out on a modern HP-workstation with the hope of providing a better agreement between corrected CIELUV value and subjective estimation of color differences. In the middle of a 19" screen two adjacent fields (2° or 10° in size) of different colors were shown. The left field wasA new experiment was carried out on a modern HP-workstation with the hope of providing a better agreement between corrected CIELUV value and subjective estimation of color differences. In the middle of a 19" screen two adjacent fields (2° or 10° in size) of different colors were shown. The left field was fixed at 5, 30, 50 and 70 CIELUV units respectively, and the color on the right field could be changed by verying its saturation and luminance. Observers were asked to adjust both colors to the same perceived color difference in relation to the background. The result shows that it was possible to achieve good agreement between predicted and perceived color differences by using a linear correction of the color coordinates u* and v*..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 6, 668 (1994)
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