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Contents
1983
Volume: 10 Issue 4
26 Article(s)
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Research Article
Laser Devices and Laser Physics
Subnatural linewidth two-photon spectroscopy
Huang Yongkai
The principle of the subnatural linewidth two-photon spectroscopy is described in this paper. The optimum conditions for observing the subnatural linewidth are analyzed. The expression of two-photon absorption probability for the decaying optical pulse series excitation is given and a simple experimental method is suggThe principle of the subnatural linewidth two-photon spectroscopy is described in this paper. The optimum conditions for observing the subnatural linewidth are analyzed. The expression of two-photon absorption probability for the decaying optical pulse series excitation is given and a simple experimental method is suggested..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 193 (1983)
Study on intracavity frequency doubling by Mg:LiNbO3 for an acousto-optic Q-switched Nd:YAG laser
Wang Tingfu, and Zhang Ghunyu
This paper reports the experimental results on the frequency doubling characteristics of Mg:LiNbO3 crystals (phase matching, photorefractive effect), and the parametric optimization for intracavity frequency doubling. Using Mg:LiNbO3 for intracavity frequency doubling of an acousto-optic Q-switched (3KHz) Nd:YAG laser This paper reports the experimental results on the frequency doubling characteristics of Mg:LiNbO3 crystals (phase matching, photorefractive effect), and the parametric optimization for intracavity frequency doubling. Using Mg:LiNbO3 for intracavity frequency doubling of an acousto-optic Q-switched (3KHz) Nd:YAG laser (3.6 kW, pumping power), output of green light with an average power of 2W, pulse width of 300 ns, peak power of 2.3 kW and conversion efficiency of 34% at 0.53μm have been obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 198 (1983)
Gain and saturation characteristics of an X-ray preionized avalanche discharge XeCl laser
Zheng Chengen, Huo Yunsheng, and Wei Yunrong
The small signal gain and saturation intensity of an X-ray preionized avalanche discharge XeCl laser are determined with the maximam loss method over a gas pressure range of 2 to 5 atm., and they are found to increase with the laser gas pressure up to at least 5 atm.The small signal gain and saturation intensity of an X-ray preionized avalanche discharge XeCl laser are determined with the maximam loss method over a gas pressure range of 2 to 5 atm., and they are found to increase with the laser gas pressure up to at least 5 atm..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 201 (1983)
Two-pass SHG produced by a LiNbO3:MgO crystal in the resonator of a Q-switched YAG laser
Zheng Chuanxiang, Zhou Yewei, Yang Shauzhi, Xie Jian, and Zhon Jiguo
In this paper two-pass SHG by a LiNbO3:MgO crystal placed in the resonator of a Q-switched YAG laser is studied and the conversion efficiency of about 60% has been obtained.In this paper two-pass SHG by a LiNbO3:MgO crystal placed in the resonator of a Q-switched YAG laser is studied and the conversion efficiency of about 60% has been obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 205 (1983)
Polarization characteristics of lasers with a LiF:F-2 Q-switch
Zhang Guifen
The polarization characteristics of the laser with a LiF:F2- Q-switch are studied. The reasons causing the polarization are presented.The polarization characteristics of the laser with a LiF:F2- Q-switch are studied. The reasons causing the polarization are presented..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 207 (1983)
Measurement of the conversion efficiency and tuningrange of some 1, 4-bis[β-(substituted phenyl)ethenyl]benzene derivatives
Xue Jiayou
The conversion efficiency and tuning range excited with nitrogen laser or Nd:YAG (THG 354.7nm) laser have been measured. It was found that these dyes give higher conversion efficiency than PPO and eoumarin -120. The tuning range is between 4075-4300A.The conversion efficiency and tuning range excited with nitrogen laser or Nd:YAG (THG 354.7nm) laser have been measured. It was found that these dyes give higher conversion efficiency than PPO and eoumarin -120. The tuning range is between 4075-4300A..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 210 (1983)
A selective branch CO2 laser operating in sequence bands
Wu Tieqiang, Xu Genchuan, Wang Shiyao, and Zhu Guoying
A CO2 laser producing lines of (00°2- [10°1, 02°1]I,Ⅱ) transitions is described. This laser is a conventional selective branch CO2 laser with intracavity hot cell. The technique can double the number of output lines of CO2 lasers. The experimental results are given.A CO2 laser producing lines of (00°2- [10°1, 02°1]I,Ⅱ) transitions is described. This laser is a conventional selective branch CO2 laser with intracavity hot cell. The technique can double the number of output lines of CO2 lasers. The experimental results are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 212 (1983)
Raman-resonant four-wave parametric mixing process in rubidium vapour
Wang Alian, and Zou Yinghua
The experimental observation and theoretical analysis on the Raman-resonant four-wave parametric mixing process in rubidium vapour have been made. The theory agrees with the experimental results.The experimental observation and theoretical analysis on the Raman-resonant four-wave parametric mixing process in rubidium vapour have been made. The theory agrees with the experimental results..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 215 (1983)
Diagnosis and compensation of wavefront distortion of laser beams
Yu Wenyan, Wang Guiying, Wang Shisen, and Li Ya
This paper reports a new method to compensate the wavef ront distortion. Taking a laser beam of astigmatic aberration as an example, the state of the laser beam compensating system can be given by the axial hologram of the laser beam. And the techniques of double-slit filter and "cross-filter" can be used to This paper reports a new method to compensate the wavef ront distortion. Taking a laser beam of astigmatic aberration as an example, the state of the laser beam compensating system can be given by the axial hologram of the laser beam. And the techniques of double-slit filter and "cross-filter" can be used to extract the near field wavef ront of the laser beam with phase modulation and amplitude fluctuation. It is possible to use the active compensating technique of laser beam in a high power Nd-glass laser system..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 220 (1983)
Talbot shearing interferometer and its application
Luo Yizu, and Wang Weijan
In this paper, we propose a principle and a method of rising the accuracy for the Talbot shearing interferometer. Tests for prisms, lenses and phase objects are given and their filtering shearing interferometric images of the respective diffraction order are also presented. Finally, the experimental results that coinciIn this paper, we propose a principle and a method of rising the accuracy for the Talbot shearing interferometer. Tests for prisms, lenses and phase objects are given and their filtering shearing interferometric images of the respective diffraction order are also presented. Finally, the experimental results that coincide with the theory are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 225 (1983)
Measurement of refractive index profile of Ti-diffused LiNbO3 plane waveguides
Huang Zhangyong
Measurement of the refractive index profile of the Ti-diffused LiNbO3 planewaveguides was performed. The measurement principle and the preparation of samples are briefly described and the results are given.Measurement of the refractive index profile of the Ti-diffused LiNbO3 planewaveguides was performed. The measurement principle and the preparation of samples are briefly described and the results are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 230 (1983)
Graded refractive index waveguides with metal-cladding
Lin Shengqiang, Li Yushan, and Jin Feng
On the glass waveguide formed by ion exchange, a silver metal layer is deposited, thereby the graded refractive index waveguide with metal-cladding is made. Eigenvalues are solved by ray-optics method. Experimental results show that the measured values of effective, refractive indices agree with the theoretical ones.On the glass waveguide formed by ion exchange, a silver metal layer is deposited, thereby the graded refractive index waveguide with metal-cladding is made. Eigenvalues are solved by ray-optics method. Experimental results show that the measured values of effective, refractive indices agree with the theoretical ones..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 232 (1983)
Research on propagation characteristics of modes in photoresist-glass planar optical waveguides
Hong Peizhi, and Yu Rongjin
The experimental studies on the propagation characteristics of modes in the photoresist-glass planar optical waveguides are reported. The effects of the photoresist film overlays on the propagation of modes in glass planar optical waveguides by silver-ion exchange are measured. The experiments of the strip-loaded curveThe experimental studies on the propagation characteristics of modes in the photoresist-glass planar optical waveguides are reported. The effects of the photoresist film overlays on the propagation of modes in glass planar optical waveguides by silver-ion exchange are measured. The experiments of the strip-loaded curved waveguides are described..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 235 (1983)
Multi-point contact MIM
Liao Shiqiang, Zhou Rufang, Tan Ciai, and Sun Shundi
We have constructed a long life time multi-point contact MIM. The diode mount is adjusted by combining the mechanical and electrical structure. Using W-Ni, W-Fe and W-Cu multi-point contact MIM, the fast response signals at 23 GHz in em wave, 50 GHz in mm wave, 10.6μm in CO2 laser and 6328 A in He-Ne laser have been deWe have constructed a long life time multi-point contact MIM. The diode mount is adjusted by combining the mechanical and electrical structure. Using W-Ni, W-Fe and W-Cu multi-point contact MIM, the fast response signals at 23 GHz in em wave, 50 GHz in mm wave, 10.6μm in CO2 laser and 6328 A in He-Ne laser have been detected. The beat signal of about 30 MHz have been observed from two grating-tuned CO2 lasers..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 238 (1983)
Selection of single pulses with an all avalanche transistor driver
Mang Yanping, Fan Dianyuan, and Xing Jiang
An optical switch with an all avalanche transistor driver is developed. It is designed to reliably select a single pulse from a mode-locked pulse train. Its operational principle and experimental results are described. The test indicates that this device has the advanteges of stable performances, reliable operation, shAn optical switch with an all avalanche transistor driver is developed. It is designed to reliably select a single pulse from a mode-locked pulse train. Its operational principle and experimental results are described. The test indicates that this device has the advanteges of stable performances, reliable operation, short delay time(-20 ns), minimum jitter, long life time and no electromagnetic disturbances..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 242 (1983)
Highly reliable and accurate power supply for repetitive pulsed lasers
Sun Naigeng, Wang Zhian, Xu Zenhua, Yuan Cunde, Zhang Baoxin, Han Aimei, and Cheng Dehua
A new circuit for repetitive pulsed supply is presented in this paper. It has the advantages of high reliability, high repetition accuracy of output voltage (typically up to 10-8), stable frequency, simple circuit structure and easy adjustment and maintenance. In addition, when the fiashlamp is continuously conducted, A new circuit for repetitive pulsed supply is presented in this paper. It has the advantages of high reliability, high repetition accuracy of output voltage (typically up to 10-8), stable frequency, simple circuit structure and easy adjustment and maintenance. In addition, when the fiashlamp is continuously conducted, the flashlamps, silicon controlled rectifiers, rectifying diodes and other circuit elements would not be damaged..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 246 (1983)
[in Chinese]
Liu Yonqzheng, Wu Xueyu, Liu Shonghao, and Wang Gugui
In this paper, we report several changes observed after 7402 cells were irradiated with a CW argon laser of low intensity. The effects on 7402 cells treated and untreated with HPD after being irradiated are compared. The wavelength effect is studied simultaneously.In this paper, we report several changes observed after 7402 cells were irradiated with a CW argon laser of low intensity. The effects on 7402 cells treated and untreated with HPD after being irradiated are compared. The wavelength effect is studied simultaneously..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 249 (1983)
[in Chinese]
[in Chinese], and [in Chinese]
The structure and performances of a small CW HF chemical laser are described. A total of 18 lines from V=1-0 and 2-1 transitions have been observed. The maximum single line output is 900 mW. In single frequency operation, the short-term frequency stability is about 20-30 MHz.The structure and performances of a small CW HF chemical laser are described. A total of 18 lines from V=1-0 and 2-1 transitions have been observed. The maximum single line output is 900 mW. In single frequency operation, the short-term frequency stability is about 20-30 MHz..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 250 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
We have demonstrated experimentally that the photodiode array is a useful tool for realtime measurement of two dimensional farfield pattern for semiconductor lasers thereby one can obtain the transverse mode structure which appears very important in optic fiber communication.We have demonstrated experimentally that the photodiode array is a useful tool for realtime measurement of two dimensional farfield pattern for semiconductor lasers thereby one can obtain the transverse mode structure which appears very important in optic fiber communication..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 251 (1983)
[in Chinese]
[in Chinese], and [in Chinese]
Safisfactory clinical results of 48 cases on sequels of celebral concussion treated with low power (7mw) He-Ne laser aeupoint irradiation in the past three years are reported. Through follow up, 27 cases (60%) were healed completely, 17 cases (36%) improved, 2 eases (4%) unchanged. The total effective rate reaches up tSafisfactory clinical results of 48 cases on sequels of celebral concussion treated with low power (7mw) He-Ne laser aeupoint irradiation in the past three years are reported. Through follow up, 27 cases (60%) were healed completely, 17 cases (36%) improved, 2 eases (4%) unchanged. The total effective rate reaches up to 96%..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 253 (1983)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 254 (1983)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 254 (1983)
[in Chinese]
[in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 255 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 255 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 4, 256 (1983)
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