Journals >Chinese Journal of Lasers
Contents
1986
Volume: 13 Issue 5
19 Article(s)
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Research Article
Laser Devices and Laser Physics
Problems on generation of continuously tunable VUV coherent radiation by four wave-mixing
Li Binxue, and Huang Yongkai
The theory and experimental results on acquiring VUV coherent sources by four wave-mixing process are briefly described. An analysis of the important aspects for effective generation of VUV coherent radiation by FWM is presented.The theory and experimental results on acquiring VUV coherent sources by four wave-mixing process are briefly described. An analysis of the important aspects for effective generation of VUV coherent radiation by FWM is presented..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 257 (1986)
Theoretical analysis on time-invariant linear system made by monomode fibers
Zhang Tao, and Wan Liangfeng
Time-invariant linear optical system is analysed theoretically in dispersive optical monomode fibers with large dispersion of the first order,. and its potential applications in optical time filtering and optical information processing are proposed.Time-invariant linear optical system is analysed theoretically in dispersive optical monomode fibers with large dispersion of the first order,. and its potential applications in optical time filtering and optical information processing are proposed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 263 (1986)
Laser emission from fluorine atomic transition 3p4S0-3s4P
He Linsheng
The transition probabilities and the life-time concerned for fluorine atoms and Si+ ions are calculated with the help of angular theory momentum and Coulumb approximation method. It is confirmed that the laser emission at 634.8nm is produced by the atomic transition of fluorine 3p4S1/2 0-3s4P3/2.The transition probabilities and the life-time concerned for fluorine atoms and Si+ ions are calculated with the help of angular theory momentum and Coulumb approximation method. It is confirmed that the laser emission at 634.8nm is produced by the atomic transition of fluorine 3p4S1/2 0-3s4P3/2..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 266 (1986)
A low jitter two channel discharge pumped excimer laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A two channel fast discharge pumped excimer laser was designed. The jitter time bettween two output laser beams was measured as ±1 ns at the operation pressure of 1 atm,and ±5 ns at 2 atm, respectively. The output energy of each channel was 80-100 mJ, the maximum was approximatly 150 mJ.A two channel fast discharge pumped excimer laser was designed. The jitter time bettween two output laser beams was measured as ±1 ns at the operation pressure of 1 atm,and ±5 ns at 2 atm, respectively. The output energy of each channel was 80-100 mJ, the maximum was approximatly 150 mJ..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 270 (1986)
Explanation and discussion on the reported experimental results of characteristics of picosecond pulse generated from synchronously pumped dye laser system
Bao Kiaoyi, and Guan Xinan
In this paper, we give the simple analytic expressions of picosecond pulses in synchronfously pumped dye laser, and also some discussion and explanation based on the above theoretical results. This theory proved especially that for the pulsewidth and average power of synchronously pumped dye laser there exists an optimIn this paper, we give the simple analytic expressions of picosecond pulses in synchronfously pumped dye laser, and also some discussion and explanation based on the above theoretical results. This theory proved especially that for the pulsewidth and average power of synchronously pumped dye laser there exists an optimum value..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 273 (1986)
Direct analysis of gas components in CO2 lasers during their early working period
Wang Yuzhi, and Liu Jiansheng
An extremely small hole of about 10-20μm in diameter was made in a glass plate with special technology. A differential action of seven orders in pressure ratio was achieved with this hole and a turbo-molecular pump of 4501/s. Using this system, direct analysis of gas components in 300 mm wave guide CO2 lasers and 800 mAn extremely small hole of about 10-20μm in diameter was made in a glass plate with special technology. A differential action of seven orders in pressure ratio was achieved with this hole and a turbo-molecular pump of 4501/s. Using this system, direct analysis of gas components in 300 mm wave guide CO2 lasers and 800 mm normal type has been performed during their early working period. Some results are presented..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 277 (1986)
Fabrication and measurement of multimode immersed planar optical waveguide in glass plates
Ruan Lizhen, Xu Jingyu, Wu Huizhen, and Chen Yixin
Multimode waveguides in the soda-lime substrate glass are fabricated by applying an electric field assisted ion migration process and a post-diffusion baking at the diffusion temperature. Fabricating the multimode immerse planaer optical waveguide in glass by two-stage ion migration process is successful. The m-line spMultimode waveguides in the soda-lime substrate glass are fabricated by applying an electric field assisted ion migration process and a post-diffusion baking at the diffusion temperature. Fabricating the multimode immerse planaer optical waveguide in glass by two-stage ion migration process is successful. The m-line spectrum of waveguides are measured and the refractive-index profiles in the waveguides are calculated by the White method..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 281 (1986)
A comprehensive measurement method of parameters for semiconductor lasers and its application
Xiao Zongyao, Chen Lianyong, and Xin Huifang
In this paper,we describe a comprehensive measurement method of major parameters for semiconductor lasers. It has been used to measure threshold current, light output power. L-I characteristics, near-field and far-field distribution., lasing spectrum, structure and luminous position of devices can be measured and obserIn this paper,we describe a comprehensive measurement method of major parameters for semiconductor lasers. It has been used to measure threshold current, light output power. L-I characteristics, near-field and far-field distribution., lasing spectrum, structure and luminous position of devices can be measured and observed without moving the measured samples..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 284 (1986)
Producing grating with variable spacing
Chen Jianwen, Fu Shufeng, Zhang Dake, Qi Zhangfeng, Yang Sen, and Wang Zhijiang
In this article, a new method of producing linearly variable spatial frequency grating is proposed and expression of grating frequency is given. This is very simple and reliable. The range of grating frequency can be easily varied by adjusting the geometrical parameters of the experimental arrangement.In this article, a new method of producing linearly variable spatial frequency grating is proposed and expression of grating frequency is given. This is very simple and reliable. The range of grating frequency can be easily varied by adjusting the geometrical parameters of the experimental arrangement..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 291 (1986)
Three color display of high density information
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
This paper describes a new laser valve large screen dsplay of three colour high density information. Its resolution is 4×106 pixel and the display area is 1.6×1.6m3. The overlapping accuracy of two colour images is better than 0.1%.This paper describes a new laser valve large screen dsplay of three colour high density information. Its resolution is 4×106 pixel and the display area is 1.6×1.6m3. The overlapping accuracy of two colour images is better than 0.1%..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 295 (1986)
An undispersive four prism beam expander
Tang Xingli, Zhao Meicun, Qian Yulan, and Yu Kaiyi
The properties, principle, design considerations, problems and method of the undispersive four prism beam expander are described. The results on measurement and laser experiments are given.The properties, principle, design considerations, problems and method of the undispersive four prism beam expander are described. The results on measurement and laser experiments are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 298 (1986)
Excursion of aligned laser beam through atmosphere above water surface and land
Ma Jian, Tang Wu, Shen Shanxiong, Guo Zengxing, and Pan Zuoli
Laser beam excursion through atmosphere above the water surface and the land is presented. The results show that the beam excursion curves of the two paths have similar outline and cycle,and are similar to those of the temperature except of their phase ahead of 0.17-0.21π. The amount of beam excursion through the land Laser beam excursion through atmosphere above the water surface and the land is presented. The results show that the beam excursion curves of the two paths have similar outline and cycle,and are similar to those of the temperature except of their phase ahead of 0.17-0.21π. The amount of beam excursion through the land path hL in vertical direction in one cycle 24 hrs is greater than that of the water path hw, and hL/hW equals to 1.14-1.40..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 302 (1986)
Real time speckle shearing interferometer using Fe:LiNbO crystal
Wang Tianji, Fan Shaowu, Zhang Shichao, Li Taotang, Xu Liangying, Su Biyun, and Tong Neizhu
This paper reports an experimental setup of real time speckle shearing interferometer. In the setup we use Fe:LiNbO3 crystal as recording medium for the speckle photography. The. transmissivity at A=488nm is <5%. The wedge angle of the shearing lens is 1°. The image hologram is simultaneously constructed on theThis paper reports an experimental setup of real time speckle shearing interferometer. In the setup we use Fe:LiNbO3 crystal as recording medium for the speckle photography. The. transmissivity at A=488nm is <5%. The wedge angle of the shearing lens is 1°. The image hologram is simultaneously constructed on the Fe:LiNbO3 crystal while the shearing speckle phothgraphy is taken by the shearing lens on the crystal. This setup can be used in measuring the deformation and real time nondestructive testing..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 306 (1986)
Laser interference optometer and its application in ophthalmology
Chen Guojian, Shi Jinhui, and Xu Jiahua
The basic principle for measuring the visual acuity of the eye f undus using two-beam laser interferemetry is described. The optical system of laser interference optometer is described in diagram. The results of clinical research in 90 cases having poor eyesight and special examples with ordinary disease in ophthalmoloThe basic principle for measuring the visual acuity of the eye f undus using two-beam laser interferemetry is described. The optical system of laser interference optometer is described in diagram. The results of clinical research in 90 cases having poor eyesight and special examples with ordinary disease in ophthalmology are reported. It is pointed out that the phenomenon of "flash start" is important in the measurement of visual acuity of the retina-brain system..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 310 (1986)
A He-Ne laser with eight selectable lines in 1.15 μm region
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A He-Ne laser having eight laser lines in 1.15μm region with a dispersive cavity is reported. The eight lines are at 1.1986 μm, 1.1767 μm, 1.1614μm, 1.1601 μm, 1.1524 μm, 1.1409μm, 1.0844μm and 1.0798 μm respectively. The optimum discharge current has been measured and output power is obtained in the range of 0.025-2.0A He-Ne laser having eight laser lines in 1.15μm region with a dispersive cavity is reported. The eight lines are at 1.1986 μm, 1.1767 μm, 1.1614μm, 1.1601 μm, 1.1524 μm, 1.1409μm, 1.0844μm and 1.0798 μm respectively. The optimum discharge current has been measured and output power is obtained in the range of 0.025-2.02 mW..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 314 (1986)
Observations on treating diarrhea infants with He-Ne laser acupoint irradiation
Pan Xiangsheng
200 cases of diarrhea infants are treated with He-Ne laser acupoint irradiation, with an effetiveness of 96.5%. This theray is characterized by its shorter course of treatment, remarkable curative effect, simplicity and safety, painlessness and noside-effect.200 cases of diarrhea infants are treated with He-Ne laser acupoint irradiation, with an effetiveness of 96.5%. This theray is characterized by its shorter course of treatment, remarkable curative effect, simplicity and safety, painlessness and noside-effect..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 316 (1986)
Curing enuresis by laser acu point irradiation
[in Chinese], [in Chinese], and [in Chinese]
This article studies a contrast between 204 cases of enuresis cured by laser acupuncture-point irradiation and 78 cases cured by medicine treatment of meclofenox-ine. The full recovery rate for laser treatment was 45.09% and the total effective rate was 89.22%, while the full recovery rate for meclofenoxine treatment wThis article studies a contrast between 204 cases of enuresis cured by laser acupuncture-point irradiation and 78 cases cured by medicine treatment of meclofenox-ine. The full recovery rate for laser treatment was 45.09% and the total effective rate was 89.22%, while the full recovery rate for meclofenoxine treatment was 33.3% and the total effective rate was 70.5%. There is a very remarkable difference beween the two treatments (P <0.001).The problem of response produced after laser irradiation is stressed. 97. 79% of the patients had the response effect within six irradiations..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 317 (1986)
Therapy of children’s mumps with He-Ne laser
Tian Suqi
33 eases of children’s mumps have been treated with low power He-Ne laser irradiation on acupoints of earlobe and acquired obvious effects. The possible mechanism is discussed.33 eases of children’s mumps have been treated with low power He-Ne laser irradiation on acupoints of earlobe and acquired obvious effects. The possible mechanism is discussed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 5, 319 (1986)
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