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Acta Optica Sinica
Contents
1986
Volume: 6 Issue 9
16 Article(s)
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Research Article
[in Chinese]
.
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 1 (1986)
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Fourier Optics and Signal Processing
Optical data processed Fourier transform spectrometer
MU GUOGUANG, KONG QIANG, WANG ZHAOQI, and LIU HUAGUANG
In this paper we present a new technique for accomplishing the Fourier transformation of interferograms via total optical means. The technique involves: (1) Obtaining intsrferograms of input optical signals through scanning by a Michelson interferometer. (2) Accomplishing the time-to-space coordinate transformation of
In this paper we present a new technique for accomplishing the Fourier transformation of interferograms via total optical means. The technique involves: (1) Obtaining intsrferograms of input optical signals through scanning by a Michelson interferometer. (2) Accomplishing the time-to-space coordinate transformation of the interferograms by linearly recording on proper medium through a temporal-spatial transducer (KDP). (3) Completing the Fourier transformation of the spatial interferogram by using a coheroirt optical spoctrum analyzing system and then obtaining the spectrum of the input optical signal at the output plane of the system..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 801 (1986)
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Theory for Lau effect of plane objects
LIU LIREN
A new idea is proposed to extend the Lau effect to any types of plane objects, and it is explained by a model of off-axis optical Fourier-transformation system. Two necessary conditions are deduced. First there must exist a definite correlation pattern between the intensity transmittances of two plane objects; second,
A new idea is proposed to extend the Lau effect to any types of plane objects, and it is explained by a model of off-axis optical Fourier-transformation system. Two necessary conditions are deduced. First there must exist a definite correlation pattern between the intensity transmittances of two plane objects; second, the plane objects can be self-imaged by diffraction in a plane monochromatic wave of normal incidence. The Lau effect of two gratings is also discussed completely from the new viewpoint, where by the Fresnol's effect is extended. In this case it is easy to predict the profiltw oi Lau fringes from the correlation operation..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 807 (1986)
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Instrumentation, Measurement and Metrology
Investigation on increasing measurement accuracy of radius of spherical curvature
YANG LI
Application of laser interferometry and digital interferometry in measuring curvature radius of spherical surfaces is discussed and compared with conventional method using spherical glass plates. The calculation results of measurement accuracies of both methods are given. The principle for further inprovement of measur
Application of laser interferometry and digital interferometry in measuring curvature radius of spherical surfaces is discussed and compared with conventional method using spherical glass plates. The calculation results of measurement accuracies of both methods are given. The principle for further inprovement of measurement accuracy of spherometer is presented..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 834 (1986)
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Lasers and Laser Optics
Investigation of a single-axial-mode Nd:YLF oscillator for laser fusion system
CAO WEILOU, CHEN QINHAO, SUN YUNLONG, ZHU ZEIMING, CHEN SHAOHE, XIE QIAO, and DEN XIMING
Single-axial-mode Q-switched Nd:YAG and Nd:YLF oscillators with quasi-CW prelase or pulsed prelase have been developed successfully. This paper is the first report on the long duration 100% single-axial-mode operation of a pulsed prelase Q-sivitched oscillator by cavity length control. The Nd: YLF oscillator has been u
Single-axial-mode Q-switched Nd:YAG and Nd:YLF oscillators with quasi-CW prelase or pulsed prelase have been developed successfully. This paper is the first report on the long duration 100% single-axial-mode operation of a pulsed prelase Q-sivitched oscillator by cavity length control. The Nd: YLF oscillator has been used in a big laser fusion system..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 769 (1986)
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An iron-ring wiggler used in a free-electron laser
CHU CHENG, HU YU, LU ZAITONG, SHI RUIGEN, and ZHANG LIFEN
We have made numerical calculation for the iron-ring wiggler used in our free-electron laser based on stimulated Raman soattering. The theoretical results were borne out by experimental measurements. By using this wriggler together with a guiding magnetic tield as the pumping source, we have obtained free-electron lase
We have made numerical calculation for the iron-ring wiggler used in our free-electron laser based on stimulated Raman soattering. The theoretical results were borne out by experimental measurements. By using this wriggler together with a guiding magnetic tield as the pumping source, we have obtained free-electron laser radiation..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 776 (1986)
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The properties of colliding pulse mode-locking in consideration of coherent interaction
CHEN JUTAO, LIU YUPU, and WANG ZHIJIANG
We have calculated the properties of colliding pulse mode-locking by considering coherent interactions. The results are in remarkable difference from those calculated from rate equations, and they are in qualitative agreement with experiments, especially with regard to pulse shapes.
We have calculated the properties of colliding pulse mode-locking by considering coherent interactions. The results are in remarkable difference from those calculated from rate equations, and they are in qualitative agreement with experiments, especially with regard to pulse shapes..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 781 (1986)
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Model analysis and experimental study of a synchronously pumped transient mode-locked rhodamine dye laser
LUO NINGYI, CHEN SHAOHUO, CHEN QINHAO, CAO WEILOU, and DENG XIMING
The evolution of light pulses from a synchronously pumped transient mode-looked rhodamine dye laser has been caloulated by using the rate equation method. The transient characteristics of the system with only 12-round-trip modulation are analysed. The real time observed on a streak camera with 1.25 (ps/ channel) is in
The evolution of light pulses from a synchronously pumped transient mode-looked rhodamine dye laser has been caloulated by using the rate equation method. The transient characteristics of the system with only 12-round-trip modulation are analysed. The real time observed on a streak camera with 1.25 (ps/ channel) is in a qualitative agreement with the computed results. Effects of the pump power on the laser pulse width are calculated. We found that the laser pulses first become shorter, then become longer and finally tend to a dynamio equilibrim. The gain. modtuation plays a role only in "the former part of laser poise round-trips; the laser pulse "width becomes longer as the pump increases..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 789 (1986)
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A compact sealed-off TEA CO
2
laser
GUO ZHEN, GAO GUIZHEN, and YU ZHIQI
A compact sealed-off TEA CO2 laser with Kovar-glass envelope for rangefinders has been developed. Using the free-potential electrode corona preionization technique, a compact, rugged, stable and reliable device has been achieved. It has both a long shelf life and operating life.
A compact sealed-off TEA CO2 laser with Kovar-glass envelope for rangefinders has been developed. Using the free-potential electrode corona preionization technique, a compact, rugged, stable and reliable device has been achieved. It has both a long shelf life and operating life..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 796 (1986)
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Materials
Calculations of crystal field parameters and energy levels of Pr
3+
ion in PrP
5
O
14
crystals
[in Chinese], and [in Chinese]
By using basic vector of point group irreducible representation as the wave function, the crystal field parameters, Racah parameters, spin-orbit interaction parameter and configuration parameters of Pr3+ ion in PrP5O14 crystals are calculated in this paper. Both J mixing and no-J mixing cases are considered. The energy
By using basic vector of point group irreducible representation as the wave function, the crystal field parameters, Racah parameters, spin-orbit interaction parameter and configuration parameters of Pr3+ ion in PrP5O14 crystals are calculated in this paper. Both J mixing and no-J mixing cases are considered. The energy levels of J mixing case are given and assigned for corresponding irreducible representations. The calculated result is in agreement with experiment..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 828 (1986)
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Nonlinear Optics
Temporal behavior of stimulated Raman scattering excited by amplitude modulating pump light
MENG SHAOXIAN, ZHANG WEIQING, LIN LIHUANG, and LIN ZUNQI
We experimentally investigated the temporal behavior of the forward and backward Stokes pulses from the stimulated Raman scattering in ethanol pumped by subnano second 6321 A pulse with amplitude modulation. It was found that both the forward and backward Stokes pulses have the same modulation period as that of the pum
We experimentally investigated the temporal behavior of the forward and backward Stokes pulses from the stimulated Raman scattering in ethanol pumped by subnano second 6321 A pulse with amplitude modulation. It was found that both the forward and backward Stokes pulses have the same modulation period as that of the pump team, but the modulatity of the Stokes pulses is much larger. A theoretical explanation for the experimental results is presented..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 824 (1986)
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Physical Optics
Long-range surface modes of metal-clad four-Layer waveguides
YANG FUZI, CAO ZHANGQI, RUAN LIZHEN, and FANG JUNXIN
The surface modes of metal-clad four-layer waveguides were analysed theoretically. We found that the long-range surface modes could be excited in such waveguides. The long-range surface modes were studied experimentally by using the angle-scanning-attenuated total-reflection method, the dependence of wave vector mode l
The surface modes of metal-clad four-layer waveguides were analysed theoretically. We found that the long-range surface modes could be excited in such waveguides. The long-range surface modes were studied experimentally by using the angle-scanning-attenuated total-reflection method, the dependence of wave vector mode losses on waveguide parameters was measured. Experimental results were in good agreement with theoretical calculations..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 815 (1986)
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Rapid Communications
Nonlinear optical coupling modes
LIAO CHANGJUN, and GEORGE I. STEGEMAN
Modes of coupling an external radiation field into an integrated optics waveguide, of which the guiding film is characterized by an in tensity-dependent refractive index, have been analyzed. Unlike the linear optical coupling, the transfer function is not a constant through its coupling area in a nonlinear coupler. The
Modes of coupling an external radiation field into an integrated optics waveguide, of which the guiding film is characterized by an in tensity-dependent refractive index, have been analyzed. Unlike the linear optical coupling, the transfer function is not a constant through its coupling area in a nonlinear coupler. The coupling efficiency can be increased by contouring suitably the layer of the nonlinear material in the coupling region..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 842 (1986)
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A new X-ray analyzer crystal——trihydroxymethylaminomethane
SU GENBO, HUANG GONGFAN, and LI ZHENGDONG
According to the relation between crystal structure and X-ray diffraction property, a new analyzer crystal-trihydroxymethylaminomethane (TAM) lias been prepared. Its was found to have a stable physico-chemical property with characteristics such as mechanical performance, linear expansion coefficient and X-ray diffracti
According to the relation between crystal structure and X-ray diffraction property, a new analyzer crystal-trihydroxymethylaminomethane (TAM) lias been prepared. Its was found to have a stable physico-chemical property with characteristics such as mechanical performance, linear expansion coefficient and X-ray diffraction property better than pentaerythritol (PET) crystal commonly used today. It has also been found that the TAM crystal is useful in practical applications..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 848 (1986)
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An approach to optimization of optical tolerance for minimum cost
TANG JIUHUA, and YU WEIZHOU
An optimization model of optical tolerance is proposed to enable straight forward calculation instead of the usual tolerance-budget balancing by trial and error. The objective function, is the minimum fabrication cost of the optical system. A general expression relating the cost of component processing to the tolerance
An optimization model of optical tolerance is proposed to enable straight forward calculation instead of the usual tolerance-budget balancing by trial and error. The objective function, is the minimum fabrication cost of the optical system. A general expression relating the cost of component processing to the tolerance is obtained by fitting to existing data. The constraints are image qualities in terms of MTF and distortion. An example is given which has two variables and is solved by network algorithm..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 854 (1986)
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Filamentation instability of nonuniform intense laser light in plasmas
LI XINLIN, and XU ZHIZHAN
The filamentation instability of nonuniform intense electromagnetic radiation, which contains large-amplitude Gaussian intensity variations (i.e., hot spots), has been studied. The relations of this instability with the intensity and transverse scale length of the initial perturbation, and with initial plasma electron
The filamentation instability of nonuniform intense electromagnetic radiation, which contains large-amplitude Gaussian intensity variations (i.e., hot spots), has been studied. The relations of this instability with the intensity and transverse scale length of the initial perturbation, and with initial plasma electron density have been calculated and discussed. The results indicate that the large-amplitude Gaussian perturbations superimposed on a linearly polarized plane electromagnetic wave will fall apart....
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 6, Issue 9, 859 (1986)
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Fourier Optics and Signal Processing
Instrumentation, Measurement and Metrology
Lasers and Laser Optics
Materials
Nonlinear Optics
Physical Optics
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