Journals >Chinese Journal of Lasers
Contents
1983
Volume: 10 Issue 12
18 Article(s)
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Research Article
Laser Devices and Laser Physics
Full quantization theory of resonant multiphoton transition
Wang Bunwen
In this article we analyse the process of resonant multiphoton from the view point of full quantization theory. Using the interaction representation and Laplace Transform, a group of linear Algebra equations and then the analytic repesentation of its charateristic determinant are obtained. The analytic solution of multIn this article we analyse the process of resonant multiphoton from the view point of full quantization theory. Using the interaction representation and Laplace Transform, a group of linear Algebra equations and then the analytic repesentation of its charateristic determinant are obtained. The analytic solution of multiphoton transition probability is at last obtained, and it is much simpler than other previous methods..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 813 (1983)
Analytic resolution for small signal gain along the direction of gas flow of a transverse flow CO2 laser
Cheng Zhaogu, Wang Zheen, Chen Kexin, and Xi Quanxin
Based on the electron distribution function we derived approximately the analytic formula of the small signal gain along the gas flow, the dependence of the small signal gain on the downstream position gas velocity, mixture pressure, downstream length of the electrodes and the discharge current. The theory coincides esBased on the electron distribution function we derived approximately the analytic formula of the small signal gain along the gas flow, the dependence of the small signal gain on the downstream position gas velocity, mixture pressure, downstream length of the electrodes and the discharge current. The theory coincides essentially with the experiment..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 821 (1983)
Effects of rare-earth elements on KNdP4O12 laser crystals
Hong Guangyan, and Liu Yuesen
KNd0.9Ln0.1P4O12 crystals (Ln=La, Ce, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tim, Yb, Lu or Y) have been grown by evaporation solution methed. Their X-ray diffraction patterns, infrared, absorption, fluorescent spectra and fluorescent lifetime have been measured. The effects of Ln3+ on KNdP4O12 have been observed.KNd0.9Ln0.1P4O12 crystals (Ln=La, Ce, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tim, Yb, Lu or Y) have been grown by evaporation solution methed. Their X-ray diffraction patterns, infrared, absorption, fluorescent spectra and fluorescent lifetime have been measured. The effects of Ln3+ on KNdP4O12 have been observed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 826 (1983)
Thermal distortion of Nd-glasses
Chen Zexing, and Li Zhongya
Thermal distortion of phosphate and silicate glasses induced by single pulsed xenon-flash lamp in different condensers are investigated. Our experiments show that in addition to the thermo-optie coefficients P and Q, the configuration of the condenser and the optical absorption of the glass are significant factors whicThermal distortion of phosphate and silicate glasses induced by single pulsed xenon-flash lamp in different condensers are investigated. Our experiments show that in addition to the thermo-optie coefficients P and Q, the configuration of the condenser and the optical absorption of the glass are significant factors which may influence thermal distortion..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 832 (1983)
Study on improvement of lifetime for UV-TEA CO2 laser by catalytic reaction of decomposed products
Gong Desheng, Liu Fuchang, Sun Dafang, Lu Weiguo, Ling Yingyi, Zhuang Dounan, Cai Tingshi, Ding Aizhen, and Wang Timan
By employing gas catalysis and circulation for UV-TBA CO2 laser we have increased the lifetime of TEA CO3 laser from 500 to over 100,000 shots.By employing gas catalysis and circulation for UV-TBA CO2 laser we have increased the lifetime of TEA CO3 laser from 500 to over 100,000 shots..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 837 (1983)
Talbot effect in an infrared laser field and its applications
Zhuang Jiejia, Liu Wumin, and Shu Deming
Talbot effect in an infrared laser field was studied experimentally. A new method of directly calibrating pyroeleetric target in the infrared vidicon system by this effect is suggested.Talbot effect in an infrared laser field was studied experimentally. A new method of directly calibrating pyroeleetric target in the infrared vidicon system by this effect is suggested..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 840 (1983)
A remote controlled pulsed laser Doppler velocimeter
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The structure and the experimental results of a remote controlled pulsed laser Doppler velocimeter is described. Using dye for Q-switching, a ruby laser pumped with double puke discharge was used as the light source and an etalon as the spectral analyzer. This system has been used to measure the temporal velocity of thThe structure and the experimental results of a remote controlled pulsed laser Doppler velocimeter is described. Using dye for Q-switching, a ruby laser pumped with double puke discharge was used as the light source and an etalon as the spectral analyzer. This system has been used to measure the temporal velocity of the cooperated object in the range of several kilometers per second..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 843 (1983)
Automatic laser alignment system for workpiece setting
Zheng Shufang
This paper describes an automatic laser alignment system and an automatic leveling system for six-freedom workpiece setting. Also discussed are the static accuracy of the system, the stability as a computer is used for analysis and the contradiction between the stability and static accuracy.This paper describes an automatic laser alignment system and an automatic leveling system for six-freedom workpiece setting. Also discussed are the static accuracy of the system, the stability as a computer is used for analysis and the contradiction between the stability and static accuracy..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 845 (1983)
A simple and practical set-up for measuring the duration of single ultrashort pulses
Liang Peihui, Ye Chao, Meng Shaoxian, Zhang Weiqing, and Kang Tuying
In this paper we describe an experimental set-up in which a simple scanning photodiode array is used for display and the autocorrelation trace is shown on a conventional oscilloscope. The pulses come from a passively mode-locked Nd glass laser at 1.06um. After expanding and splitting, laser beams produce the noncollineIn this paper we describe an experimental set-up in which a simple scanning photodiode array is used for display and the autocorrelation trace is shown on a conventional oscilloscope. The pulses come from a passively mode-locked Nd glass laser at 1.06um. After expanding and splitting, laser beams produce the noncollinear second harmonic (NSHG) in a LiIO3 crystal. According to the dependence of the duration of the fundamental frequency beam on the half width of the NSHG spatial intensity distribution in our ease, it has been measured that the average duration of the pulse train is (19+2) ps, a sharp peak of 0.4ps being superimposed on a broad background. This setup is of low cost and pratical. Some calculations dealing with the design and operation are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 848 (1983)
Laser thin film for frequency doubling——high transmissivity at 1.06 μm and high reflectivity at 0.53μm
Li Qingguo
High transmissivity at 1.06μm and high reflectivity at 0.53μm are obtained by coating a supplementary layer on the A/4 stack. The primary results are T>99.3% at 1.06um and B>99.6% at 0.53μm.High transmissivity at 1.06μm and high reflectivity at 0.53μm are obtained by coating a supplementary layer on the A/4 stack. The primary results are T>99.3% at 1.06um and B>99.6% at 0.53μm..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 853 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
This paper describes a solid laser using NdxLa1-xP5O14(NLPP) as the medium. It has a size of a fountain pen and a pocket power supply.This paper describes a solid laser using NdxLa1-xP5O14(NLPP) as the medium. It has a size of a fountain pen and a pocket power supply..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 857 (1983)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Silane was deposited into silicon films on the substrates by first preheating the quartz substrates with laser, and then admitting the hybrid of silane gas and H3 gas into the reaction chamber. The thickness of the film center was found to be 2um with an area of 10.5 mm2.Silane was deposited into silicon films on the substrates by first preheating the quartz substrates with laser, and then admitting the hybrid of silane gas and H3 gas into the reaction chamber. The thickness of the film center was found to be 2um with an area of 10.5 mm2..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 858 (1983)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
This paper reports the combining treatment of 6 cases of advanced stage liver carcinoma with CO2 laser. The CO2 laser has been used in all of the cases to evaporate the section, earcinous tuber and the other metastatic mass of the carcinoma. A part of the liver has been cut off in three cases. None of them died on the This paper reports the combining treatment of 6 cases of advanced stage liver carcinoma with CO2 laser. The CO2 laser has been used in all of the cases to evaporate the section, earcinous tuber and the other metastatic mass of the carcinoma. A part of the liver has been cut off in three cases. None of them died on the operating table and a short time after the operation. A patient who has been followed up for ten months is still alive yet..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 859 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
We used a low power He-Ne laser to irradiate directly the accupoints and successfully treated the diseases, 98 sick ears in 84 cases. A mean course was4.6 days for the treatment of furnueulosis of the external auditory and 4.9 days for that of acute diffuse otitis.We used a low power He-Ne laser to irradiate directly the accupoints and successfully treated the diseases, 98 sick ears in 84 cases. A mean course was4.6 days for the treatment of furnueulosis of the external auditory and 4.9 days for that of acute diffuse otitis..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 860 (1983)
[in Chinese]
[in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 861 (1983)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 12, 864 (1983)
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