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Journals >
Chinese Journal of Lasers
Contents
1987
Volume: 14 Issue 11
18 Article(s)
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 1 (1987)
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Laser Devices and Laser Physics
Suggestion of neutron generation with powerful lasers
Wang Ganchang
Concrete suggestion of producing neutrons using laser light is put forward. Also described are the reasons for selecting LiD as preferential target, and dependence of neutron yield N on the incident light energy E and the focus range. In addition, preparation of LiD targete, the experimental demonstration of neutron an
Concrete suggestion of producing neutrons using laser light is put forward. Also described are the reasons for selecting LiD as preferential target, and dependence of neutron yield N on the incident light energy E and the focus range. In addition, preparation of LiD targete, the experimental demonstration of neutron and X-ray together with some issues of quantitative measurement are discussed. To make the facility compact, the author proposed that chemicals might be used instead of capacitors..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 641 (1987)
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Two-dimensional theoretical model for diffusional CW oxygen-iodine chemical lasers
Feng Hao, and Zhuang Qi
A two-dimensional theoretical model for predicting the diffusional CW oxygen-iodine laser performances is presetted. The parallel mixing at constant lateral pressure between a pair of primary and secondary streams is assumed. A set of parabolic partial differential equations are solved using the finite-difference techn
A two-dimensional theoretical model for predicting the diffusional CW oxygen-iodine laser performances is presetted. The parallel mixing at constant lateral pressure between a pair of primary and secondary streams is assumed. A set of parabolic partial differential equations are solved using the finite-difference techniques. The change of specific power with flow direction and the effect of the concentration of O2(1) on specific power are studied..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 646 (1987)
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A large volume UV preionized TEA CO
2
laser containing Ar
Yu Shusheng, and Du Longlong
In a large volum UV preionized TEA CO2 laser partial replacement of He with industrial-grade Ar is possible. The effects of Ar contents on the discharge stability and the output pulse energy are studied. When CO2-N2-He-Ar is doped with tripropylamine, the discharge stability can be improved.
In a large volum UV preionized TEA CO2 laser partial replacement of He with industrial-grade Ar is possible. The effects of Ar contents on the discharge stability and the output pulse energy are studied. When CO2-N2-He-Ar is doped with tripropylamine, the discharge stability can be improved..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 650 (1987)
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A single-mode pulsed dye laser pumped by a copper vapour Laser
Zhao Meioun, Zhu Lizhi, Qian Yulan, and Tang Xingli
The design of a pulsed single-mode dye laser pumped by a copper vapour laser 13 presented. The experimental results using Rh6G, BhB and Kiten Bed S are given. The dye laser produces up to 200mW single-mode average power at an efficiency of over 4.5%. The linewidth. of the single-mode laser is 100MHz and its wavelength
The design of a pulsed single-mode dye laser pumped by a copper vapour laser 13 presented. The experimental results using Rh6G, BhB and Kiten Bed S are given. The dye laser produces up to 200mW single-mode average power at an efficiency of over 4.5%. The linewidth. of the single-mode laser is 100MHz and its wavelength range is 563-642 nm..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 654 (1987)
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Effect of change in scale and rotation of signals in a lensless intensity correlator
Wang Zhaoqi
The effect of change in scale and rotation of the signals in a lenslesa intensity correlator using Fresnel holographic filter has been considered both theoretically and experimentally. The experimental results show that it ia not sensitive to scale change and rotation. Thus it offers convenience in the application of c
The effect of change in scale and rotation of the signals in a lenslesa intensity correlator using Fresnel holographic filter has been considered both theoretically and experimentally. The experimental results show that it ia not sensitive to scale change and rotation. Thus it offers convenience in the application of certain pattern recognition..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 658 (1987)
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Investigation of regularity of frequency doubling effect in benzene derivative molecular crystals
Li Songxian, Li Junqian, Wu Wenshi, Zhou Nianshu, and Wu Bochang
The dipole moments of eighteen benzene derivative molecules were calculated theoretically, and the frequency doubling properties of their crystals were predicted. These molecular crystals have been synthesized and their frequency doubling effects and molecular dipole moments have also been measured. The theoretically p
The dipole moments of eighteen benzene derivative molecules were calculated theoretically, and the frequency doubling properties of their crystals were predicted. These molecular crystals have been synthesized and their frequency doubling effects and molecular dipole moments have also been measured. The theoretically predicted frequency doubling properties were in fair agreement with the measured values. This provides us new evidence that there is a correlation between the frequency doubling effects and the molecular dipole moments which was put forward by the authors some time ago. Four benzene derivatives that may become promising frequecy doubling materials have been selected. Among them the intensities of second harmonic efficiency of 3-MNA and 3-NBA is 7 and 2 respectively, with that of ADP taken as unity..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 662 (1987)
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Projection type holographic microscope (PHM) with double projection objectives and a holographic screen
Xu Kunxian
A projection-type holographic microscope with double projection-objectives and a holographic screen used for integrated circuits assembly and quality control is described. The optical principle of PHM, recording scheme of holographic dispersion of screen and relative parameters of PHM are discussed.
A projection-type holographic microscope with double projection-objectives and a holographic screen used for integrated circuits assembly and quality control is described. The optical principle of PHM, recording scheme of holographic dispersion of screen and relative parameters of PHM are discussed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 667 (1987)
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Diagnosis of kinetic process in silane LPCVD by means of OLD
Fu Guangsheng, Li Xiaowei, Han Li, Zhang Lianshui, Dong Lifang, Lu Furun, and Xue Chunyin
The shock wave in SiH4 laser plasma chemical vapour deposition (LPCVD) are measured byoptoacoustic laser deflection (OLD) technique. The result shows that the shock wars induced by laser gas breakdown is the basic gaa kinetic process in LPGVD. Also discussed is its influence on thin film growth.
The shock wave in SiH4 laser plasma chemical vapour deposition (LPCVD) are measured byoptoacoustic laser deflection (OLD) technique. The result shows that the shock wars induced by laser gas breakdown is the basic gaa kinetic process in LPGVD. Also discussed is its influence on thin film growth..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 671 (1987)
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Study on optical properties of superficial layers on bulk metal surfaces
Yang Xinliang, Qi Jining, Guo Hong, and Zhang Zhiming
Optical properties of superficial layers on bulk metal surface are determined by ATB technique with the Otto configuration. The measured ATE spectra are fitted with the theoretical calculations and their optical constants and thickness of the superficial layers are determined.
Optical properties of superficial layers on bulk metal surface are determined by ATB technique with the Otto configuration. The measured ATE spectra are fitted with the theoretical calculations and their optical constants and thickness of the superficial layers are determined..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 674 (1987)
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Statistical correlation properties of optical field produced by single mode and multi-mode optical fibers
Qin Keqi, Chen Jianwen, and Wang Runwen
The optical field at the exit end of multi-mode fiber is treated as a quasi-homogeneous source, while that of single-mode fiber is treated as homogeneous partial coherence source. The second-order statistical correlation function and angular correlation function are used to analyze the correlation properties of the exi
The optical field at the exit end of multi-mode fiber is treated as a quasi-homogeneous source, while that of single-mode fiber is treated as homogeneous partial coherence source. The second-order statistical correlation function and angular correlation function are used to analyze the correlation properties of the exit end and the near and far field of optical fibers. The transverse and angular coherent lengths and the optical intensity distribution parameters have been obtained. The theoretical results are compared to those of experiments..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 677 (1987)
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Research of ultrasonic modulated laser micro-probe spectrophotometer
Lian Jie, An Ruguo, Zhang Guitian, Jian Xiluo, Shi Yi, and Bu Fengquan
An ultrasonic modulated solid laser as light source has been developed on the basis of analysing the shortcomings of free-running laser applied universally to laser micro-probe spectrophotometer presently. A new design of time-delay voltage supply of auxiliary electrodes is put forward. Combining the two techniques, an
An ultrasonic modulated solid laser as light source has been developed on the basis of analysing the shortcomings of free-running laser applied universally to laser micro-probe spectrophotometer presently. A new design of time-delay voltage supply of auxiliary electrodes is put forward. Combining the two techniques, an ultrasonic modulated laser micro-probe spectrophotometer with high stability, high sensitivity and low background of spectrum has been developed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 685 (1987)
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A laser power supply with newly designed thyristor 3-phase rectifier
Wang Shikang, and Xue Bin
A newly designed thyristor full wave rectifier is introduced here. Differing from the traditional synchronizing and triggering mode, the rectifier adopts the opto-electric coupler as isolator and the couter-EPROM set as pulse allotter. Though both the analogue and digital mode are involved in the processing of signal t
A newly designed thyristor full wave rectifier is introduced here. Differing from the traditional synchronizing and triggering mode, the rectifier adopts the opto-electric coupler as isolator and the couter-EPROM set as pulse allotter. Though both the analogue and digital mode are involved in the processing of signal transmission, the main process which included the series-phase-shifting and the parallel-triggering is formed by the digital circuit. So apart from the merits of simplicity and reliability, the outstanding advantage is the high anti-disturbance ability. It can be the first choice as laser power supply..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 689 (1987)
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Study on stimulated Raman scattering of CH
4
Cui Yiben, Shen Deli, Zhao Zhensheng, Pan Zhonghan, Hu Xuejin, and Liu Songhao
Experimental results on the SE8 of CH4 pumped by 0.532μm laser are reported. The pulse width of the first-order Stokes light is 1/2 shorter than that of the pumping one.
Experimental results on the SE8 of CH4 pumped by 0.532μm laser are reported. The pulse width of the first-order Stokes light is 1/2 shorter than that of the pumping one..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 692 (1987)
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Investigation on CARS thermometry for flame temperature measurement
Wang Qinyu, Jin Taogen, Dong Genfa, Yu Haiping, and Li Yufen
CARS spectra of N2 in a premised coal gas/air flat flame have been measured. By comparing the experimental spectra with the theoretically calculated one, the temperature of the flame has been determined.
CARS spectra of N2 in a premised coal gas/air flat flame have been measured. By comparing the experimental spectra with the theoretically calculated one, the temperature of the flame has been determined..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 694 (1987)
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Etched and fused hemispherical microlenses for coupling single-mode laser into single-mode fiber
Lu Shanda, and Jin Zhiliang
The contour lines of the coupling efficiency of hemispherical mierolenses determined by parameters of single-mode laser and single-mode fiber are calculated. The method for etched and fused fabrication on the single-mode fiber end is described. Experimental results for hemispherical lenses are in good agreement with th
The contour lines of the coupling efficiency of hemispherical mierolenses determined by parameters of single-mode laser and single-mode fiber are calculated. The method for etched and fused fabrication on the single-mode fiber end is described. Experimental results for hemispherical lenses are in good agreement with the theory, and 70% of the optimum theoretical value has been obtained..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 697 (1987)
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Concentration profile of dopants in optical fiber preforms measured with Raman spectra
Ma Quang, Li Yu, Wang Tinting, Cai Tinshi, and Gao Jian
The concentration profile of dopants in optical fiber preforms has been measured with Eaman spectra and the results agree quite well with those from scanning electron microscope equipped with energy spectroscope.
The concentration profile of dopants in optical fiber preforms has been measured with Eaman spectra and the results agree quite well with those from scanning electron microscope equipped with energy spectroscope..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 700 (1987)
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[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 11, 703 (1987)
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Laser Devices and Laser Physics