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Acta Optica Sinica
Contents
1983
Volume: 3 Issue 6
17 Article(s)
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 1 (1983)
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Atmospheric Optics and Oceanic Optics
Experimental study of 10.6μm laser extinction by atmospheric aerosol
Wu JIHUA, SUN FENGYI, and GONG ZHIBEN
An experimental study demonstractes that there is a strong uncertainty of the 10.6μm laser extinction by atmospheric aerosol in relation to the same value of visibility or aerosol concentration. However, the data seem to indicate that there is a certain correlation between 10.6μm laser extinction by atmospheric aerosol
An experimental study demonstractes that there is a strong uncertainty of the 10.6μm laser extinction by atmospheric aerosol in relation to the same value of visibility or aerosol concentration. However, the data seem to indicate that there is a certain correlation between 10.6μm laser extinction by atmospheric aerosol and visibility from the statistical point of view. For such a correlation an approximate expression is given here, and the possible applications in laser engineering are discussed..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 536 (1983)
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Fourier Optics and Signal Processing
The imaging properties of holographic Iens
CAI LIZHONG, and LV LIANGXIAO
According to the point of view that the transmissive hologram can be reconstructed by reflection, the analyses of transmission imaging and reflection imaging are both presented. We postulated a model of lens-mirror composition for the ±1 order images of a holcgraphie lens. By using the method of Fourier optics, au
According to the point of view that the transmissive hologram can be reconstructed by reflection, the analyses of transmission imaging and reflection imaging are both presented. We postulated a model of lens-mirror composition for the ±1 order images of a holcgraphie lens. By using the method of Fourier optics, authors obtained the expressions for the point spread function and the transfer function of a holographic lens with arbitrary aperture. From this the limited resolution and the cut-off frequency may be derived. The iahomogeneity of the colour blur of image is also discussed..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 529 (1983)
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Instrumentation, Measurement and Metrology
Evaluation of the wave-front aberration by method of star-testing-Coma aberrations
XIANG CAIXIN
This paper points out: (1) One can evaluate a possible range of coma aberration quantities according to the dissymmetry in star patterns; (2) The maximum sensitivity of coma aberration evaluation is about λ/25; (3) It is difficult to determine exactly an geometrical value of coma aberration by method of star-testing.
This paper points out: (1) One can evaluate a possible range of coma aberration quantities according to the dissymmetry in star patterns; (2) The maximum sensitivity of coma aberration evaluation is about λ/25; (3) It is difficult to determine exactly an geometrical value of coma aberration by method of star-testing..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 557 (1983)
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Lasers and Laser Optics
Effects of inhomogeneous broadening of the performance of CW chemical lasers
E XUEQUAN, and GAO ZHI
In this paper CW diffusion chemical lasers with two energy levels are described by kinetic model. The results of the kinetic model in consideration of both inhomogenoous broadening and homogeneous broadening are given and compared with rate model. The discussion is focused on the effects of inhomogeneous broadening. Th
In this paper CW diffusion chemical lasers with two energy levels are described by kinetic model. The results of the kinetic model in consideration of both inhomogenoous broadening and homogeneous broadening are given and compared with rate model. The discussion is focused on the effects of inhomogeneous broadening. The specific formulas used for the calculation of the characteristic of oscillator are given. In case of certain G, and limited chemical pumping rate K, the intensity, power output and chemical efficiency of CW chemical lasers are exactly solved..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 513 (1983)
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High energy experiment of the ruby laser
WAXG ZHIJIANG, ZHOU FFUZHENG, and LIN KANGCHUN
Influences of the optical homogeneity of ruby laser on laser output energy are analysed in this paper. High energy experiment with the ruby laser has been conducted, and 1500 J* of laser energy has been obtained. Having resolved the problem of efficiency drop, 3000 J** laser energy has been reached.
Influences of the optical homogeneity of ruby laser on laser output energy are analysed in this paper. High energy experiment with the ruby laser has been conducted, and 1500 J* of laser energy has been obtained. Having resolved the problem of efficiency drop, 3000 J** laser energy has been reached..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 521 (1983)
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Study of three-body ion-ion recombination in XeCl
*
308.0 nmlaser
ZHENG CHENGEN
Recombination rates for processes Xe+ +Cl→ + M- XeCl* +M (M = He, Ne or Ar) have been calculated. It has been found that the recombination rates in buffer rare-gases He, Ne, Ar at 300K reach the maximums of 3.3cm3see-1, 2.5cm3sec-1, 2.4om3sec-1, at pressures of 17 atm, 6.5 atm, 2 atm respectively. In addition, the reco
Recombination rates for processes Xe+ +Cl→ + M- XeCl* +M (M = He, Ne or Ar) have been calculated. It has been found that the recombination rates in buffer rare-gases He, Ne, Ar at 300K reach the maximums of 3.3cm3see-1, 2.5cm3sec-1, 2.4om3sec-1, at pressures of 17 atm, 6.5 atm, 2 atm respectively. In addition, the recombination rates drastically decrease with increasing gas temperature at fixed gas density..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 525 (1983)
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Materials
The stresses and photoelastic effects in GaAs GaAlAs multilayer wafers with masked and selective thermal oxidation structure
LIU HONGDU, FENG ZHECHUAN, and GUO CHANGZI
In this paper, the stresses and photoelastic effects are calculated in GaAs-GaAIAs multilayer wafers with masked and selective thermal oxidation structure. Authors also propose a new method of Lloyd s mirror interference in a medium for determing directly the refractive index variations caused by the photoelastic effec
In this paper, the stresses and photoelastic effects are calculated in GaAs-GaAIAs multilayer wafers with masked and selective thermal oxidation structure. Authors also propose a new method of Lloyd s mirror interference in a medium for determing directly the refractive index variations caused by the photoelastic effect. The estimated values of index variation from our experiments agree with the theoretical ones within an order of magnitude. The above study would be valuable in the field of semiconductor lasers and integrated optics..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 541 (1983)
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Formation of refractive index gradient in optical glass
LI XISHAN, XIA QINGSHBNG, and JIANG ANMIN
Based on the combination of theory and practice, this paper discusses the formation of refractive index gradient in optical glass and related questions of optical quality in the production processes.
Based on the combination of theory and practice, this paper discusses the formation of refractive index gradient in optical glass and related questions of optical quality in the production processes..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 549 (1983)
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Rapid Communications
Using a synchronous optical probe to diagnose the temperature distribution and the effects of radio ponderomotive force in laser plasma
CHEN SHOUHUA, XU YUGUANG, and BONG ZHONGHUA
When a optical probo-beam is scattered by a plasma with high temperature and density, it is easy to separate the ion component from the electron conponent of the scattering spectrum. Thus, the plasma temperature distribution can be measured. Besides, the plasma electron density distribution has been measured using a in
When a optical probo-beam is scattered by a plasma with high temperature and density, it is easy to separate the ion component from the electron conponent of the scattering spectrum. Thus, the plasma temperature distribution can be measured. Besides, the plasma electron density distribution has been measured using a interferometer. The results show significant effects of the radiative ponderomotive force..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 562 (1983)
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Optical absorption of silicon under CW CO
2
laser irradiation
LI YUANHENG
Basing on the Fermi statistical distribution of electron and hole in semiconductor silicon, the dependence of the transmittance of silicon under CO2 laser irradiation on temperature has been calculated, furthermore theoretical results were proved by experimental data. It has been shown that silicon can strongly absorb
Basing on the Fermi statistical distribution of electron and hole in semiconductor silicon, the dependence of the transmittance of silicon under CO2 laser irradiation on temperature has been calculated, furthermore theoretical results were proved by experimental data. It has been shown that silicon can strongly absorb energy of the beam under intense CO2 laser irradiation, the mechanism of the absorption is dominately absorption of the free carrier..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 568 (1983)
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Re-discussion on the reticle method for measuring the parameters of Gaussian optical spot
YIN DAREN, and XU SHENLONG
Suppose a optical spot is of a Gaussian intensity distribution and is modulated by a sectored reticle, then the parameters of this optical spot can be exactly derived from measurements of the harmonic amplitude spectrum.
Suppose a optical spot is of a Gaussian intensity distribution and is modulated by a sectored reticle, then the parameters of this optical spot can be exactly derived from measurements of the harmonic amplitude spectrum..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 573 (1983)
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Spectroscopy
Phase orthogonality in polarization intermodulated excitation (POLINEX) spectroscopy
YAN GUANGYAO, and WANG ZHAOYONG
This paper reports the phase orthogonality both theoreitically and experimentally in POLINEX spectroscopy with a modulated polarization and a fixed polarization of two linearly polarized optical beams. It is possible to make the phase of the Doppler-free signal orthogonal to that of the Doppler-broadened background, if
This paper reports the phase orthogonality both theoreitically and experimentally in POLINEX spectroscopy with a modulated polarization and a fixed polarization of two linearly polarized optical beams. It is possible to make the phase of the Doppler-free signal orthogonal to that of the Doppler-broadened background, if the fixed polarizer is properly adjusted..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 481 (1983)
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The comparison between the optoacoustic detection and optoelectric detection of laser Stark spectroscopy
TU WEIMIN, XIE BEIXING, and WANG GUOWEN
In this paper, the experiment of optoacoustic detection of stark spectroscopy for CH3C1 and CH3F molecules is described. This method has been compared with conventional optoeleotric detection. An optoacoustic signal is produced when a laser line coincides with a molecular absorption line which has been shifted by makin
In this paper, the experiment of optoacoustic detection of stark spectroscopy for CH3C1 and CH3F molecules is described. This method has been compared with conventional optoeleotric detection. An optoacoustic signal is produced when a laser line coincides with a molecular absorption line which has been shifted by making use of stark effect, and is detected by a special microphone. The dependence of optoacoustic signals on sample gas pressure has been determined and derivative signals of a number of line components of CH3F molecule under the condition of 11500 V cm stark field and 150 mTorr pressure have been recorded. The experiment indicates that fche optoacoustic signal decreases rapidly when the pressure is reduced in order to apply high stark tield to the sample gas,and it limits to obtain higher stark field. Authors have discovered that under similar conditions the optoelectric detection has higher sensitivity and higher signal-noise ratio than optoacoustic detection. And yet the optoacoustic detection method may be improved undoubtedly by putting the laser closer to the microphone using higher laser power till the absorption saturated^ and reducing the gap between two stark electrodes..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 487 (1983)
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Laser-induced optogalvanic effects and spectra for polyatomic molecules
ZHOU SHIKANG, and WANG GuowEN
This paper reports the investigation of laser-induced optogalvanic effects and spectra of six samples CH3Cl, CH3OH, C2H3OH, C2H3C1, C2H4 and NH3. Intense optogalvanic effects have been observed. The actions of the V-I characteristics and discharge relaxations of discharge tubes on the optagalvanic effects are investiga
This paper reports the investigation of laser-induced optogalvanic effects and spectra of six samples CH3Cl, CH3OH, C2H3OH, C2H3C1, C2H4 and NH3. Intense optogalvanic effects have been observed. The actions of the V-I characteristics and discharge relaxations of discharge tubes on the optagalvanic effects are investigated. The mechanisms of the effects are discussed tentatively. The results show that laser-induced optogalvanic infrared spectroscopy can be used as means of analysis for gases or vapors with high spectral resolution..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 495 (1983)
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Optical spectrum of new ultrafast saturable absorption dyes and measurement of their relaxation time
QIU PINHUA
In this paper, theo ptical spectrum of several new infrared ultrafast saturable absorption dyes, the measurement of their relaxation time in picosecond region are mainlly described and the experimental technology are discussed. The time resolution of the setup has been determined being shorter than 1 ps by the autocorr
In this paper, theo ptical spectrum of several new infrared ultrafast saturable absorption dyes, the measurement of their relaxation time in picosecond region are mainlly described and the experimental technology are discussed. The time resolution of the setup has been determined being shorter than 1 ps by the autocorrelation measurement. The measured absorption recovery time of four kinds of the dyes are form 5 to 9 ps. Their optochemical stability is much better than Kodak 9860..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 501 (1983)
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Stimulated electronic Raman scattering in superheated rubidium vapour
WANG AHLIAN, and ZOU YINGHUA
Using a specially designed heat-pipe oven, the 5S1/2-6S1/2 stimulated electronic Eaman scattering (SERS) and some relative amplified spontaneous emission (ASE) have been observed in superheated Rb vapour. The experimental results reveal that ASE processes have some new characteristics and have dramatic influence on the
Using a specially designed heat-pipe oven, the 5S1/2-6S1/2 stimulated electronic Eaman scattering (SERS) and some relative amplified spontaneous emission (ASE) have been observed in superheated Rb vapour. The experimental results reveal that ASE processes have some new characteristics and have dramatic influence on the tuning profiles of the SERS signal..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 3, Issue 6, 507 (1983)
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Atmospheric Optics and Oceanic Optics
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