Journals >Chinese Journal of Lasers
Contents
1983
Volume: 10 Issue 11
18 Article(s)
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Research Article
Laser Devices and Laser Physics
Calculation of multiphoton process of Cs atoms
Tan Weihan, and Luan Shaojin
Applying the Laplace transform of time-dependent Shrodinger equation, we have obtained a set of equations which can be treated as the stationary eigenvalue problem. The transition probability and energy level shift of Cs atoms in the process of three photon absorption have been calculated using this method.Applying the Laplace transform of time-dependent Shrodinger equation, we have obtained a set of equations which can be treated as the stationary eigenvalue problem. The transition probability and energy level shift of Cs atoms in the process of three photon absorption have been calculated using this method..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 749 (1983)
Theoretical calculation and experimental observation of laser hardening of carbon steels
Xie Bomin, Sun Tongkun, Li Xuechang, and Yin Shijian
We have used a transversely-excited flowing CO2 laser with the output power of about 2kW for heat-treatment of the surface of carbon-steel. A simple method for calculating the temperature change during the scanning process is proposed. The obtained data of the hardened zone near the surface coincide with the theoreticaWe have used a transversely-excited flowing CO2 laser with the output power of about 2kW for heat-treatment of the surface of carbon-steel. A simple method for calculating the temperature change during the scanning process is proposed. The obtained data of the hardened zone near the surface coincide with the theoretical predictions satisfactorily..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 754 (1983)
Study on structure and property of laser hardening of carbon steels
Pu Wanlin, Pen Aiping, and Miao Huihua
In this article the structures and properties have been studied on six crabon steels in laser hardening. The rule for structural changes and unusual phenomena occuring in laser hardening have been analysed.In this article the structures and properties have been studied on six crabon steels in laser hardening. The rule for structural changes and unusual phenomena occuring in laser hardening have been analysed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 759 (1983)
A high repetition rate mode-locked Nd:YAG laser and analysis on its thermally stable resonator
He Huijuan, Lu Guoxian, Li Yongchun, Gu Shengru, Qian Linxing, and Zhao Longxing
A high repitition rate mode-locked Nd: YAG laser is reported. Pumping induced thermal lens effect in resonator is studied and the conditions for thermally stable resonator is analyzed.Two configurations of thermally stable resonators have been designed and the experimental results given. The maximum repetition rate of A high repitition rate mode-locked Nd: YAG laser is reported. Pumping induced thermal lens effect in resonator is studied and the conditions for thermally stable resonator is analyzed.Two configurations of thermally stable resonators have been designed and the experimental results given. The maximum repetition rate of laser is 30pps (TEM00 mode), the energy of envelope is about 10mj, the divergence of beam is about 0.5mr and the minimum pulse width(FWHM)is 21ps..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 765 (1983)
Research of stability of Nd:YAG AM mode-locked laser
Huang Guobiao, Dong Shalei, Guan Yiling, and Wen Zhongyi
To improve the output stability of the mode-looked laser, technical problems have studied on the 200MHz acousto-optical modulator, 100 MHz U. H. F. driving source, the stabilization of the laser resonator length, the stable current of the Kr lamp, shock-proof, stabilization of light by light-feedback, etc.To improve the output stability of the mode-looked laser, technical problems have studied on the 200MHz acousto-optical modulator, 100 MHz U. H. F. driving source, the stabilization of the laser resonator length, the stable current of the Kr lamp, shock-proof, stabilization of light by light-feedback, etc..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 770 (1983)
Discharge spectra of mercuric halides and their kinetic processes
Yu Yaojin, Jiang Aibao, Zhang Jilin, and Han Shaoqin
Discharge spectra of mercuric halide containing Ne, N2, Xe gases have been measured. Kinetic processes have been measured with the methed of afterglow. The experimental results show that emission spectra of a mercuric halide (B3Σu+→X2Σu+) result from the electron collision, Penning reaction and the transfer of the collDischarge spectra of mercuric halide containing Ne, N2, Xe gases have been measured. Kinetic processes have been measured with the methed of afterglow. The experimental results show that emission spectra of a mercuric halide (B3Σu+→X2Σu+) result from the electron collision, Penning reaction and the transfer of the collision energy..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 774 (1983)
Preparation of doped-KCI single crystals as color center laser material
Sun Rongchuan, Zhang Wenzhen, Qiu Jizhan, Ding Changrong, and Xu Chenghuang
Using Czoehralsky method, single crystals of sizes up to φ25×100 mm of lithium-doped KC1 as color center laser material were obtained. The lithium content was controlled to within 10-3-10-2% by weight in crystal. The absorption spectra of three doped-KCl single crystals after being irradiated with X-rays were measUsing Czoehralsky method, single crystals of sizes up to φ25×100 mm of lithium-doped KC1 as color center laser material were obtained. The lithium content was controlled to within 10-3-10-2% by weight in crystal. The absorption spectra of three doped-KCl single crystals after being irradiated with X-rays were measured..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 778 (1983)
Study of non-crystalline metals by laser irradiation using SEM
Huang Dequn, Wang Haobing, and Su Baorong
The surface morphology, crack section morphology and metallographic structure of Fe-and-Al based eutectics (Fe-Ni-P-B-C, Al-Si, Al-Si-Mg-Mn) before and after treatment with high repetition rate YAG laser light were observed with a scanning electron microscope. The results show that the sample surface irradiated by laseThe surface morphology, crack section morphology and metallographic structure of Fe-and-Al based eutectics (Fe-Ni-P-B-C, Al-Si, Al-Si-Mg-Mn) before and after treatment with high repetition rate YAG laser light were observed with a scanning electron microscope. The results show that the sample surface irradiated by laser light has been changed into Non-crystalline and the non-crystalline layer possesses higher ductility and better thermal stability..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 782 (1983)
Measurement of photoacoustic signal by laser heterodyne at high temperatures
Guo Zhuanyun, and Zhang Guangyin
Photoacoustic absorption measurement of intrinsic GaAs by laser heterodyne at high temperature of 500K was made for the first time.Photoacoustic absorption measurement of intrinsic GaAs by laser heterodyne at high temperature of 500K was made for the first time..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 785 (1983)
Frequency doubling of a CW dye laser with an external auxiliary active cavity
Lu Yaxiong
The article discusses the possibility to improve the efficiency of frequency doubling of single-mode E6G CW dye laser radiation in an external auxiliary active ring cavity. With this technique, ultraviolet output power can be an order of magnitude greater than that obtained with a passive cavity.The article discusses the possibility to improve the efficiency of frequency doubling of single-mode E6G CW dye laser radiation in an external auxiliary active ring cavity. With this technique, ultraviolet output power can be an order of magnitude greater than that obtained with a passive cavity..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 788 (1983)
Measurment of atmospheric attenuation of DF/HF chemical laser radiation
Wu Jihua, Pu Dasheng, Chen Xiaohua, Gong Zhiben, Zhang Rongyao, Lian Jiyou, and Liu Jianyong
In this paper we present the main results of the attenuation of some spectral lines of DF/HF chemical laser radiation, measured in the actual atmosphere. A comparison, of our results with other theoretical and experimental work is made.In this paper we present the main results of the attenuation of some spectral lines of DF/HF chemical laser radiation, measured in the actual atmosphere. A comparison, of our results with other theoretical and experimental work is made..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 792 (1983)
Laser welding of titanium
Li Qingxiu, Yi Boten, and Wan Naibin
A series of tests have been made to examine the effects of O2, N2, H2 and air on laser welding of titanium and inert gas was used to protect the welding section. Our experimental results indicate the necessity of using inert gas as a protective measure in obtaining satisfactory welding effects.A series of tests have been made to examine the effects of O2, N2, H2 and air on laser welding of titanium and inert gas was used to protect the welding section. Our experimental results indicate the necessity of using inert gas as a protective measure in obtaining satisfactory welding effects..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 795 (1983)
Application of liquid crystal light valve to real-time optical data processing
Zhong Qiming, Jiang Tingqiu, Che Mingyu, and Ji Rongcai
In this paper we report some experiments of the liquid crystal light valve (LCLV) fabricated in our laboratory for realtime optical data processing, including edge enhancement, optical correlation and holographic recording of manuscripts and documents.In this paper we report some experiments of the liquid crystal light valve (LCLV) fabricated in our laboratory for realtime optical data processing, including edge enhancement, optical correlation and holographic recording of manuscripts and documents..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 798 (1983)
A pulsed HF laser with unstable resonator
Xu Jie, Cheng Yuming, He Guozhen, and Zhuang Xin
A detailed experimental study of the performances of a pulsed HF laser with unstable resonators of different magnification has been made. The significant improvement of the beamquality has been achieved. And the energy of the laser with an unstable resonator has not been decreased.A detailed experimental study of the performances of a pulsed HF laser with unstable resonators of different magnification has been made. The significant improvement of the beamquality has been achieved. And the energy of the laser with an unstable resonator has not been decreased..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 801 (1983)
Possibility of developing a new kind of optical elements
Li Xianshu, Yang Zhuohao, Chen Xiaoke, and Zhou Xianguang
Based on the matrix theory for the light propagation in a system consisting of plane screens [1, 2] and the relevant idea [3] proposed by one of the authors, an initial design for a new kind of optical elements is first presented here. Its main feature is that regardless of the order of the input light beam mode with aBased on the matrix theory for the light propagation in a system consisting of plane screens [1, 2] and the relevant idea [3] proposed by one of the authors, an initial design for a new kind of optical elements is first presented here. Its main feature is that regardless of the order of the input light beam mode with axial symmetry, after passing through a sequence of these elements the output light wave will be nearly a fundamental mode. Obviously, some action to transform the high order modes of light beam into the fundamental mode should take place here. Hence was named "the screen for transformation of light beam modes". Although our desing is not satisfactory, the energy losses are too large, it has been shown that there is great possibility of developing this new kind of optical element..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 807 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
The refractive indices and the transmissivities of the GaP crystal made in our country have been measure d.At He-Ne laser wavelength of 6328A the refractive index is 3.310, the transmissivity for the sample of 5mm thick is about 80%. The experiments showed that the characteristics of polarization rotation for the GaP pThe refractive indices and the transmissivities of the GaP crystal made in our country have been measure d.At He-Ne laser wavelength of 6328A the refractive index is 3.310, the transmissivity for the sample of 5mm thick is about 80%. The experiments showed that the characteristics of polarization rotation for the GaP prism coupler had not been observed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 810 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Emission of pulsed Nd-glass laser at 1.36μm is reported. Threshold and efficiency of the laser are measured and the optimum reflectivity of output-mirror is determined.Emission of pulsed Nd-glass laser at 1.36μm is reported. Threshold and efficiency of the laser are measured and the optimum reflectivity of output-mirror is determined..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 11, 811 (1983)
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