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Acta Optica Sinica
Contents
1987
Volume: 7 Issue 2
17 Article(s)
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Research Article
[in Chinese]
.
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 1 (1987)
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Fourier Optics and Signal Processing
Laser correlation imaging of UHF acoustic standing wavefront
YI MING, LIU LIXIN, WU ZHIXIAN, HUANG ZONGHUA, and YANG XUANMIN
On the basis of the Fourier optics, we ve analysed the optical far-field of a laser beam passing through the UHF acoustic standing waves and found that there is temperal spectrum in the spatial spectrum on the far-field plane besides the spatial spectrum. In accordance with the above results we ve developed an imaging
On the basis of the Fourier optics, we ve analysed the optical far-field of a laser beam passing through the UHF acoustic standing waves and found that there is temperal spectrum in the spatial spectrum on the far-field plane besides the spatial spectrum. In accordance with the above results we ve developed an imaging principle of UHF acoustic standing wavefronts: by temporal crosscorrelation, the non-zero Value of correlation of the same temporal frequencies in the different spatial frequencies is obtained. Therefore we have not only clarified the confusion of the theory but also developed a new method for imaging the UHF acoustic st anding wavefronts. And the results have been proved experimehtally..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 175 (1987)
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Lasers and Laser Optics
Quantum theory and experimental study of laser polarization
GUO SIJI, GAO ZHIHUI, and MAO HUAJIN
The full quantum theory of laser polarization is presented in this paper. The polarization properties of multimode laser beam in anisotropio cavity are analysed. Basic equations, calculation curve and polarization configurations of describing the inter-angle of mode polarization directions in 6328 A He-Ne laser vs. ani
The full quantum theory of laser polarization is presented in this paper. The polarization properties of multimode laser beam in anisotropio cavity are analysed. Basic equations, calculation curve and polarization configurations of describing the inter-angle of mode polarization directions in 6328 A He-Ne laser vs. anisotropy are given. The effects of the phase anisotropy on mode polarization by stress is investigated. The experimental result and theory analysis is coincident..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 97 (1987)
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Telescopic resonators for dynamic stable TEM_(00) mode operation
LU BAIDA
In the general case the condition for thermal stability of telescopic resonators in TEM00 mode operation is derived by using equivalent resonators and transfer matrix method. The expression is simple but strict, and can be generalized easily to the multielement resonators with many internal lenses one of which is therm
In the general case the condition for thermal stability of telescopic resonators in TEM00 mode operation is derived by using equivalent resonators and transfer matrix method. The expression is simple but strict, and can be generalized easily to the multielement resonators with many internal lenses one of which is thermal lens. The results are compared and discussed with those obtained by approximate methods..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 105 (1987)
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Study of thermal gas lens in self-heated copper vapor lasers
SHENG QIMING, and LIANG PEIHUI
Analysis of the thermal gas lens in the discharge tube of a self-heated copper vapor lasers (OVL) is given. For the different schemes of copper vapor laser, it has been found that the steady-state OVL can be equivalent to a convex lens or a concave lens. As results of the experiment, the relations between the focal len
Analysis of the thermal gas lens in the discharge tube of a self-heated copper vapor lasers (OVL) is given. For the different schemes of copper vapor laser, it has been found that the steady-state OVL can be equivalent to a convex lens or a concave lens. As results of the experiment, the relations between the focal length of the thermal gas lens and the input power and buffer gas pressure are presented. The evolution process of the thermal gas lens from concave to convex lens is described..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 112 (1987)
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The operation of an electron-beam controlled CO
2
laser at 6 atmospheres
Guo WUMING, YANG HONGYAO, WANG JIANWEI, XU YIZHUANG, and WU NIANlu
The operation of an electron-beam controlled CO2 laser at 6 atmospheres in reported. The discharge characteristic and the frequency tunability are studied.
The operation of an electron-beam controlled CO2 laser at 6 atmospheres in reported. The discharge characteristic and the frequency tunability are studied..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 120 (1987)
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Materials
Study of self-frequency-doubling from 1.06 to 0.53μm with a multi-functional crystal NYAB
LIU ENQUAN, HOU XUEYUAN, LU BAOSHENG, WANG JUN, PAN HENGFU, and JIANG MINHUA
A new excited emission/nonlinear multi-funotioiial crystal rare earth borate crystal NdxY1-xAl3(BO3)4(abb. NYAB) has been developed. The effective nonlinear coefficient of type I phase matohirtg XIeff=4.056×10-9 e.s.u. is 4 timea more than that of the KDP crystals provided that the phase matohing coditions are sat
A new excited emission/nonlinear multi-funotioiial crystal rare earth borate crystal NdxY1-xAl3(BO3)4(abb. NYAB) has been developed. The effective nonlinear coefficient of type I phase matohirtg XIeff=4.056×10-9 e.s.u. is 4 timea more than that of the KDP crystals provided that the phase matohing coditions are satisfied. The measured value by SHG method is in good agreement with this data. Using the tunable dye laser (Dataohrom-5000) as pumping source, the laser self-frequency-doubling output from the NYAB crystal at 1.06~0.53 μm is obtained for the first time. The threshold energy measured is less than 2 mJ, maximum oonyersion efficiency is 14.3%; and the output energy at 0.53 μm is 5mJ..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 139 (1987)
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Theoretical calculation and experimental observation of birefringence images of dislocation in SBN crystals
XU XIUYING, and ZHANG XINGKUI
In this paper, considering the photo-elastic anisotropy, we calculated the contrast of birefringence topography of dislocation in SBN crystals along the optical axis. It is shown that the petals of edge dislocation image for anisotropio crystals are longer than that for isotropic crystals. The images for screw dislocat
In this paper, considering the photo-elastic anisotropy, we calculated the contrast of birefringence topography of dislocation in SBN crystals along the optical axis. It is shown that the petals of edge dislocation image for anisotropio crystals are longer than that for isotropic crystals. The images for screw dislocation have no contrast. These results have been compared with experiments..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 144 (1987)
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Nonlinear Optics
Broad-band SHG of Q-switched Nd: glass laser
QIN WENHUA, CAI XIJIE, WANG ZHJIANG, and WU HONGXING
The coupling equations describing broad-band laser nonlinear interaction arae presented. Several types of frequency-doublers are used for broad-band SHG of a Nd: glass Q-switched laser system with Δλ,(FWHM) =60A. The experimental results gree with the theory very well.
The coupling equations describing broad-band laser nonlinear interaction arae presented. Several types of frequency-doublers are used for broad-band SHG of a Nd: glass Q-switched laser system with Δλ,(FWHM) =60A. The experimental results gree with the theory very well..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 151 (1987)
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Optical Design and Fabrication
General consideration of optical system in the projection aligner
WANG ZHIJIANG, and ZOU HAIXING
The specific parameters of main optical system are deduced from the requirement of pattern transfer for the projection aligner. The limit of these parameters is discussed.
The specific parameters of main optical system are deduced from the requirement of pattern transfer for the projection aligner. The limit of these parameters is discussed..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 159 (1987)
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OPTOELECTRONICS
Ponderomotive effect near the reflection points of electron plasma waves
YU WEI, and XU ZHIZHAN
In this paper, the ponderomotive effect near the reflection points of electron plasma waves is investigated for the first time. The interdependent relations among the various parameters which characterize the effect are determined, and the plasma density jump and electron plasma wave are self-consistently derived.
In this paper, the ponderomotive effect near the reflection points of electron plasma waves is investigated for the first time. The interdependent relations among the various parameters which characterize the effect are determined, and the plasma density jump and electron plasma wave are self-consistently derived..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 166 (1987)
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Rapid Communications
Review on the tolerance for colour contribution index of camera lenses (ISO/CCI)
SHEN HAILONG
In this paper, chromaticity co-ordinates of photographic effect of camera lenses corresponding to the six points, which limited the tolerance of ISO/001, is calculated by means of the basic formulae of colorimetry. The color difference of photographic, effects between the lenses according with the six points and the IS
In this paper, chromaticity co-ordinates of photographic effect of camera lenses corresponding to the six points, which limited the tolerance of ISO/001, is calculated by means of the basic formulae of colorimetry. The color difference of photographic, effects between the lenses according with the six points and the ISO standard camera lens is computed by using the OIE 1964 color difference formulae. According to these results, the rationality of the tolerance of ISO/CCI is discussed and the proposal for dividing the teleranoe of ISO/CCII into two regions is presented..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 181 (1987)
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A new approach enhancing squeezing
[in Chinese], and [in Chinese]
The re-squeezing approach was found to enhance squeezing. In this letter a hybrid transient second harmonic generation prooesses is discussed and large squeezing of mode w is obtained.
The re-squeezing approach was found to enhance squeezing. In this letter a hybrid transient second harmonic generation prooesses is discussed and large squeezing of mode w is obtained..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 188 (1987)
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On the polymerization of LB mono-molecular layers studied by ATR technique
YANG XINLIANG, CHEN GUANHUN, ZHANG ZHIMING, TAO FENGGANG, and XU LINXIAO
The polymerization of a Langmuir-Blodgett mono-molecular layers composed with 11-methaoryloylaminoundecanoio acid molecules is studied. It is the first time to show that these organic molecules will be straightened during the polymerization process.
The polymerization of a Langmuir-Blodgett mono-molecular layers composed with 11-methaoryloylaminoundecanoio acid molecules is studied. It is the first time to show that these organic molecules will be straightened during the polymerization process..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 190 (1987)
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Spectroscopy
Experimental and theoretical investigation on the anomolous signal in Ne CW optogalvanic spectroscopy
YIN LIFENG, HU QIQUAN, LI SHIFANG, and LIN FUCHEN
Based on the measured results by using the technique of sensitivity fluorescence speotroscopy and the improved theoretical model suggested by authors early, the mechanism of anomolous optogalvanio signal induced by CW laser tuned to the resonance frequency between the transitions of Ne 1s3, 1s5 and 2p levels was explai
Based on the measured results by using the technique of sensitivity fluorescence speotroscopy and the improved theoretical model suggested by authors early, the mechanism of anomolous optogalvanio signal induced by CW laser tuned to the resonance frequency between the transitions of Ne 1s3, 1s5 and 2p levels was explained satisfactorily..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 126 (1987)
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Mechanism of optogalvanic signal generated in CO
2
-N
2
mixture system
ZHOU GUANGDI, WANG CHAOHUA, and TANG MINGJIANG
The optogalvanio signal (OGS) in CO2-N2 discharge tube irradiated by CO2 laser has been measured by a narrow band-pass filter, and the electron energy distribution (EED) has been measured by a second-order differential circuit. It is considered that OGS in CO2-N2 discharge tube is generated through step ionization when
The optogalvanio signal (OGS) in CO2-N2 discharge tube irradiated by CO2 laser has been measured by a narrow band-pass filter, and the electron energy distribution (EED) has been measured by a second-order differential circuit. It is considered that OGS in CO2-N2 discharge tube is generated through step ionization when CO2 and N2 molecules in electric excited states are disturbed, and the rate of step ionization is changed by 10.6μm laser irradiation..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 134 (1987)
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X-Ray Optics
Enhancement of X-ray emission from laser plasma in high frequency electric field
FENG XIANPING, FAN PINZHONG, ZHANG ZENGQUAN, and XU ZHIZHAN
It was found experimently that the X-ray emission was enhanced from GaAs and Zn plasmas irradiated by a Nd:glass laser pulse with width of 2ns and on target power density of 5 ×1013 W/cm2 in a high frequency electric field in 0.1 Torr air atmosphere. The intensity of X-ray was much stronger in the presence of the
It was found experimently that the X-ray emission was enhanced from GaAs and Zn plasmas irradiated by a Nd:glass laser pulse with width of 2ns and on target power density of 5 ×1013 W/cm2 in a high frequency electric field in 0.1 Torr air atmosphere. The intensity of X-ray was much stronger in the presence of the high frequency field than that without it. The ratios of the intensity α -I(field)/I(no field) were determined from the obtained spectra, however the plasma temperature deduced from the recombinatition continuum was lower in the presence of high frequency eleotrio field (Te=300 eV) than, that without it (Te=430 eV)..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 7, Issue 2, 171 (1987)
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Fourier Optics and Signal Processing
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