Contents
1994
Volume: 14 Issue 5
24 Article(s)
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Fourier Optics and Signal Processing
Interconnection Matrix of the Banyan Network and Its Simulation Study
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The interconnection matrix of the banyan network was obtained and simulation calculation was carried out, which accords with experimental results. It provides an efficient analysis method for theoretical study on interconnection functions of the banyan networks.The interconnection matrix of the banyan network was obtained and simulation calculation was carried out, which accords with experimental results. It provides an efficient analysis method for theoretical study on interconnection functions of the banyan networks..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 513 (1994)
Instrumentation, Measurement and Metrology
Analysis on the Effective Ranging of TV Tracking for Low Altitude Target
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The influence on the TV tracking effective ranging in regard to both the signal and the forget-to-background contrast is analysed on the features of long-distance tracking and measuring of the target travelling at low altitude, based on the experience in development of opto-electronic tracking and measuring instrument.The influence on the TV tracking effective ranging in regard to both the signal and the forget-to-background contrast is analysed on the features of long-distance tracking and measuring of the target travelling at low altitude, based on the experience in development of opto-electronic tracking and measuring instrument. The discussion is emphasized on the dynamic contrast formed as the target passing across the TV field of view and its influence to the effective ranging. A method is proposed to improve the dynamic target-to-background contrast and to expand the TV tracking effective ranging by adopting electronic shutter and spectral matching techniques..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 523 (1994)
Electro-Optic Measurement and Simulation of Electric Field Distribution in GaAs/AlGaAs Array
[in Chinese], and [in Chinese]
This paper introduces a new nondestructive method-continuous wave electro-optic probing (CWEOP), which we have applied to detect the electrical field distribution of GaAs/AlGaAs LED array. The experiment results reflect the direction of injected current, the spreading of charge carriers and the homogeneity of the lightThis paper introduces a new nondestructive method-continuous wave electro-optic probing (CWEOP), which we have applied to detect the electrical field distribution of GaAs/AlGaAs LED array. The experiment results reflect the direction of injected current, the spreading of charge carriers and the homogeneity of the light emission by comparing the field distribution of each unit. The principle, experimental setup of the method and the experimental results and discussions to them are given. The comparison between the result of computer-aided simulation and the experiment one is also given at last..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 528 (1994)
A New Optical Frequency Discrimination Method
[in Chinese], and [in Chinese]
A new optical frequency discrimination method is presented in this paper. The initial theoritical envisage is demonstrated on the experimental system constructed by the interference filters.A new optical frequency discrimination method is presented in this paper. The initial theoritical envisage is demonstrated on the experimental system constructed by the interference filters..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 534 (1994)
A New Design of Normal Incidence Scanning Reflectometer
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A new type of the normal incidence scanning reflectometer, in which a M-type prism is used to split light beam, has been designed and constructed. The incident angle is about 5° and the photon energy region is from 1.5 to 3.5 eV. The measurement is controlled automatically by a computer. The measureing precision iA new type of the normal incidence scanning reflectometer, in which a M-type prism is used to split light beam, has been designed and constructed. The incident angle is about 5° and the photon energy region is from 1.5 to 3.5 eV. The measurement is controlled automatically by a computer. The measureing precision is about 0.01..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 539 (1994)
Lasers and Laser Optics
Mode and Temporal Coherence in a High-Gain Laser
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The dependence of temporal coherence of the laser beam on operation conditions of a high-gain laser has been calculated theoretically on the base of the model of Gaussian-shape power spectrum. We have studied temporal coherence of the CuBr laser experimentally and compared it with the calculating results.The dependence of temporal coherence of the laser beam on operation conditions of a high-gain laser has been calculated theoretically on the base of the model of Gaussian-shape power spectrum. We have studied temporal coherence of the CuBr laser experimentally and compared it with the calculating results..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 480 (1994)
Diffraction Coupled High Power Nd:YAG Lasers
[in Chinese]
In this paper, a novel resonator is proposed and designed for high power solidstate lasers, where the diffraction filter is used to get high quality beam, and the diffraction losses are used as useful output. We have obtained experimentally almost diffraction limited laser output with power near 100 Watts.In this paper, a novel resonator is proposed and designed for high power solidstate lasers, where the diffraction filter is used to get high quality beam, and the diffraction losses are used as useful output. We have obtained experimentally almost diffraction limited laser output with power near 100 Watts..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 486 (1994)
Nonlinear Optics
Cerenkov Second Harmonic Generation in Proton Exchanged LiTaO3Optical Waveguides
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The characters of proton exchanged(PE) LiTaO3 optical waveguides are studied and the Cerenkov second harmonic generation (CSHG) from 1.064 μm to 0.532 μm is demonstrated the in these waveguides with a conversion efficiency of 122 %/W. cm2.The quality of the harmonic beam is high and the beam divergences along the two dThe characters of proton exchanged(PE) LiTaO3 optical waveguides are studied and the Cerenkov second harmonic generation (CSHG) from 1.064 μm to 0.532 μm is demonstrated the in these waveguides with a conversion efficiency of 122 %/W. cm2.The quality of the harmonic beam is high and the beam divergences along the two directions of vertical and parallel to the plane of the waveguide are 1.3 and 3.3 milliradian respectively..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 490 (1994)
Optical Devices
Programming Optical Platform
[in Chinese], and [in Chinese]
On the basis of analyzing the three-axis image-stabilizing reflecting prism assembly,this paper presents a method for image-stabilizing with the prism assembly and scanning with the other optcal elements.and its respective formula is deduced. Combined with computer,the prism assemly can be named as programming optical On the basis of analyzing the three-axis image-stabilizing reflecting prism assembly,this paper presents a method for image-stabilizing with the prism assembly and scanning with the other optcal elements.and its respective formula is deduced. Combined with computer,the prism assemly can be named as programming optical platform..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 544 (1994)
Physical Optics
Gaussian Beam Propagation Through Gradient Index Fibers──A Group of Analytical Solutions for Beam Amplititude and Beam Spot Radius
[in Chinese]
Based on the para-ctal wave equation, a group of analytical solutions for amplititude and spot radius of the Gaussian beam propagation through ampered gradientindex fibers are derived. From which a series of specific solutions for Gaussian beam propagation in P8rabolic, conical and taper-like gradient index fibers are Based on the para-ctal wave equation, a group of analytical solutions for amplititude and spot radius of the Gaussian beam propagation through ampered gradientindex fibers are derived. From which a series of specific solutions for Gaussian beam propagation in P8rabolic, conical and taper-like gradient index fibers are obtained in this paper..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 494 (1994)
Wavevector Diagrams of Floquet-Bloch Waves in Periodic Dielectric Structures
[in Chinese]
The dispersion phenomena of the Floquet-Bloch waves in Periodic dielectric structures are analysed and summarized in terms of the wavevector diagrams. It is shown that the formation and variation of the stop-bands in wavevector diagrams are strongly dependent on the light wavelength and the structural parameters. With The dispersion phenomena of the Floquet-Bloch waves in Periodic dielectric structures are analysed and summarized in terms of the wavevector diagrams. It is shown that the formation and variation of the stop-bands in wavevector diagrams are strongly dependent on the light wavelength and the structural parameters. With the increase of the periodic length or with the decrease of the light wavelength, the wavevector diagrams become more complicated,and more stop-bands would appear..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 499 (1994)
The Numerical Calculation of the Vector Modal Theory for Rectangular-Groove Grating
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
According to the vector modal theory for rectangular-groove grating, the results of numerical calculation is given. We calculate the diffraction efficiency and polarization distribution of incident plane wave with arbitrary incident direction and polarization, and also study the effect of grating structural parameters According to the vector modal theory for rectangular-groove grating, the results of numerical calculation is given. We calculate the diffraction efficiency and polarization distribution of incident plane wave with arbitrary incident direction and polarization, and also study the effect of grating structural parameters (peroid, groove width,depth) on the diffration field..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 504 (1994)
Experimental Research on Sinusodial Phase Modulating Double F-P Interferometry
[in Chinese]
Experiment on multi-mode fibre used for light transmiting,sinusodial phase modulating F-P interferometry has been performed.It has been proved by using Fourier analysis of intensity signal that either fundermental frequence amplitude or phase of intensity imply some information about the change of cavity length (or optExperiment on multi-mode fibre used for light transmiting,sinusodial phase modulating F-P interferometry has been performed.It has been proved by using Fourier analysis of intensity signal that either fundermental frequence amplitude or phase of intensity imply some information about the change of cavity length (or optical path difference).Therefore a method of time duration measurement for measuring phase or fundermental frequence amplitude has been suggested. Analyses of the sensitivity thresholds measured with the present set-up show that the method and the set-up could be free of temperature drift and simplify the signal processing, hence be more suitable for the on-line measurement..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 508 (1994)
Quantum Optics
Multi-Photon Interaction Between N-Atom and Single-Model Light Field
[in Chinese], [in Chinese], and [in Chinese]
The exact solution to evolution of quantum state of total system for multiphoton interaction between N-atom and single-model light field has been obtained by using dressed dick's state method. We have also studied the eviution of population inversion of N-atom system and the quantum statistical properties of light The exact solution to evolution of quantum state of total system for multiphoton interaction between N-atom and single-model light field has been obtained by using dressed dick's state method. We have also studied the eviution of population inversion of N-atom system and the quantum statistical properties of light field and found some new phenomena of the system..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 469 (1994)
Evolution of the Field Entropy in the Jaynes-Cummings Model with an Additional Kerr Medium
[in Chinese], and [in Chinese]
The dynamics properties of the evolution of field entropy in the JaynesCummings model with an additional Kerr medium are studied.The effects of nonlinearity interaction of the Kerr medium with the model field and of detuning on the evolution of the field entropy are discussed.The dynamics properties of the evolution of field entropy in the JaynesCummings model with an additional Kerr medium are studied.The effects of nonlinearity interaction of the Kerr medium with the model field and of detuning on the evolution of the field entropy are discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 475 (1994)
Rapid Communications
Hyperfine Structure Measurements on High-Lying Levels of Lanthanum by Laser Fluorescence Spectroscopy
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
By using laser fluorescence spectroscopy we measured the hyperfine structures of three second-step transitions(0 cm -1→1 6856 cm-1→34272 cm-1),(3010 cm-1→20082 cm-1→36853 cm-1),(3010 cm-1→20082 cm-1→37544 cm-1) in a La hollow cathode discharge lamp. The a coefficients of 34272 cm -1,36853 cm-1,and 37544 cm-1 levels havBy using laser fluorescence spectroscopy we measured the hyperfine structures of three second-step transitions(0 cm -1→1 6856 cm-1→34272 cm-1),(3010 cm-1→20082 cm-1→36853 cm-1),(3010 cm-1→20082 cm-1→37544 cm-1) in a La hollow cathode discharge lamp. The a coefficients of 34272 cm -1,36853 cm-1,and 37544 cm-1 levels have been calculated. The results given in this paper are first reported..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 548 (1994)
Sensitivity Analyses of Light Scattering and Extinction Parameters to the Aerosol Refractive Index
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
By using Mie theory of light scattering, under different type of the Junge size distribution, the numberical calculations were carried out about the sensitivity of the ratio of aerosol extinction to backscatter, extinction and backscatter to real and imaginary parts of aerosol refractive index. Some useful conclusions By using Mie theory of light scattering, under different type of the Junge size distribution, the numberical calculations were carried out about the sensitivity of the ratio of aerosol extinction to backscatter, extinction and backscatter to real and imaginary parts of aerosol refractive index. Some useful conclusions were obtained..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 551 (1994)
Analytic Method for Calculating Propagation Comstant of TM Waves at a Nonlinear Interface
[in Chinese], and [in Chinese]
Exact dispersion relations and an analytic formula for calculating propagation constant and the power flux for TM guided waves at a nonlinear interface have been obtained. The advantage of this method is that the detailed field distrubutions are not necessarily known for solving the dispersion relations and also for caExact dispersion relations and an analytic formula for calculating propagation constant and the power flux for TM guided waves at a nonlinear interface have been obtained. The advantage of this method is that the detailed field distrubutions are not necessarily known for solving the dispersion relations and also for calculating the power flux..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 554 (1994)
Lens Design of the Flat Field, Apochromatic CF Microscopic Objective
[in Chinese]
This paper discussed the scientific meanning and the main design idea of the flat field, apochromatic CF microscopic objective which is a new model of microscopic objective since 1980' s. The paper discussed the main idea, correction of the secondary spectrum and the petzval sum, and the evaluation of image qualityThis paper discussed the scientific meanning and the main design idea of the flat field, apochromatic CF microscopic objective which is a new model of microscopic objective since 1980' s. The paper discussed the main idea, correction of the secondary spectrum and the petzval sum, and the evaluation of image quality. Finally the author evaluated the design example in terms of the Strehl ratio S. D..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 558 (1994)
Spectroscopy
Theoretical Study on Radiative Property of 42Ⅱ→32∑＋Transition in NaS Molecule
[in Chinese], [in Chinese], and [in Chinese]
Using the reflection method,the probability density of 42Ⅱ→32∑+ transition of NaS molecule was calculated.The spouteneous emission, conditions for populstion inversion and stimulated emission were studied theoretically a hos for the experimental.Using the reflection method,the probability density of 42Ⅱ→32∑+ transition of NaS molecule was calculated.The spouteneous emission, conditions for populstion inversion and stimulated emission were studied theoretically a hos for the experimental..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 449 (1994)
Spectral Properties and Zero-Phonon Transitions of Color Centers in Colored KCl and KBr Crystals
[in Chinese]
The production, observation and thermostability of the zero-phonon lines of R2 center and 756.6 nm in colored KCl crystals and R2 center in colored KBr crystals are investigated in detail. The proper thermal annealing was used for strengthening the zerophonon lines. The related explanation is given in this paper.The production, observation and thermostability of the zero-phonon lines of R2 center and 756.6 nm in colored KCl crystals and R2 center in colored KBr crystals are investigated in detail. The proper thermal annealing was used for strengthening the zerophonon lines. The related explanation is given in this paper..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 455 (1994)
Study of 23∏g←X1∑+gTwo-Photon Transition in Sodium Molecule
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
By comparing the veriations of equifrequency two-photon transition intensity in sodium molecules pumped by circularly and linearly polarized alser, and calculating the simulation emission spectra numerically,the two-photon transitions have been labelled.By comparing the veriations of equifrequency two-photon transition intensity in sodium molecules pumped by circularly and linearly polarized alser, and calculating the simulation emission spectra numerically,the two-photon transitions have been labelled..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 460 (1994)
A Study of Spectral Response Characterization on New S25and LEP photocathodes
[in Chinese]
In this paper, spectral response characterization of New S25 and LEP photocathodes is studied. Influences of photocathode structure parameter,photoelectron escape depth and photocathode thickness on spectral response characterization are theoretically analysed. Its potentiality for practical trialkali photocathodes is In this paper, spectral response characterization of New S25 and LEP photocathodes is studied. Influences of photocathode structure parameter,photoelectron escape depth and photocathode thickness on spectral response characterization are theoretically analysed. Its potentiality for practical trialkali photocathodes is calculated. It shows that to make trialkali photocathodes having the merits of New S25 and LEP photocathodes can compare with the NEA photocathodes on spectral response characterization..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 465 (1994)
Thin Films
Preparation and Optical Properties of the Bi_2S_3Microcrystallites Doped Thin Film
[in Chinese], [in Chinese], and [in Chinese]
The Bi2S3 microcrystallites doped thin film with a significant quantum size effects has been successivelly prepared by the sol-gel process from the hydrolysis of a complex solution of Si (OC2H5 )4, Bi (NO3 )3. 5H2O and SC (NH2)2. The room temperature optical transmission spectra of the films heat-treated at 500℃ for 0～The Bi2S3 microcrystallites doped thin film with a significant quantum size effects has been successivelly prepared by the sol-gel process from the hydrolysis of a complex solution of Si (OC2H5 )4, Bi (NO3 )3. 5H2O and SC (NH2)2. The room temperature optical transmission spectra of the films heat-treated at 500℃ for 0～120min show the evidence of quantum size effects as the red-shift of the transmission valley with longer heating time. The optical second harmonic generation.(SHG) was also observed using a Nd:YAG colliding mode locked laser with the maxium intensity of 104 W/cm2..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 518 (1994)
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