Journals >Chinese Journal of Lasers
Contents
1983
Volume: 10 Issue 1
22 Article(s)
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Research Article
Laser Devices and Laser Physics
Diffraction of a blazed grating illuminated with a Hermit-Gaussian beam
Zheng Hui
The Fraunhofer diffraction distribution from a blazed grating illuminated with Hermit-Gaussian beams is investigated analytically. It is found that the resolution of the grating illuminated with a Hermit-Gaussian beam is not determined by the spot size on the grating but by the parameter of the beam itself, i. e. the rThe Fraunhofer diffraction distribution from a blazed grating illuminated with Hermit-Gaussian beams is investigated analytically. It is found that the resolution of the grating illuminated with a Hermit-Gaussian beam is not determined by the spot size on the grating but by the parameter of the beam itself, i. e. the radius of the beam waist section..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 1 (1983)
Simulation calculation of light propagation
Wang Guiying, and Fan Dianyuan
The field distribution of laser beam after passing through the spatial filters and the foeusable power of aberrated light beam in high power lasers have been calculated using self-similar propagation modes. The intensity profile of focusing volume of aberrated light beam is given, and the calculation accuracy is 1%.The field distribution of laser beam after passing through the spatial filters and the foeusable power of aberrated light beam in high power lasers have been calculated using self-similar propagation modes. The intensity profile of focusing volume of aberrated light beam is given, and the calculation accuracy is 1%..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 8 (1983)
Study of CARS application in chemistry
Gao Zheng, Liu Dianyou, Hua Luan, and Guo Chu
CABS technique with the broadband dye laser is described. With this technique, CARS as well as CSRS spectra can be obtained simultaneously and more than one Raman line of pyridine were recorded by each shot. The results reported show that this technique can be used to record Raman spectra of some organic molecules withCABS technique with the broadband dye laser is described. With this technique, CARS as well as CSRS spectra can be obtained simultaneously and more than one Raman line of pyridine were recorded by each shot. The results reported show that this technique can be used to record Raman spectra of some organic molecules with nanosecond time resolution..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 13 (1983)
Quick measurement of spectral distribution and efficiency of μs level flash-lamp using OMA-2 system
Wei Yunhou, Huang Bunlan, Huang Ruiping, Dong Zhifong, Chen Xirong, and Zhang Cunhao
By using OMA-2 system (Optical Multichannel Analyzer), the spectral distribution and UV spectral effeeiency in 2200 to 8800 A region of a flash-lamp with a pulse width (FWHM) of about 3 /LIS have been measured. Only four pulses are required for making each measurement.The influence of variation of discharge voltage andBy using OMA-2 system (Optical Multichannel Analyzer), the spectral distribution and UV spectral effeeiency in 2200 to 8800 A region of a flash-lamp with a pulse width (FWHM) of about 3 /LIS have been measured. Only four pulses are required for making each measurement.The influence of variation of discharge voltage and the gas pressure of the flash-lamp on its spectral distribution has been investigated. The UV spectral efficiency is increased from 13% to 17% with the increasing of discharge voltage and gas pressure. The total UV emission energy also increases appreciably..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 17 (1983)
Investigation on drilling by ultrasonic modulation of laser pulse spikes
[in Chinese], [in Chinese], and [in Chinese]
The advantages of using regular laser pulse spikes for drilling and the selection of pulse spike parameters are discussed. The regulation for ultrasonic modulation of laser pulse spikes and the influence of modulation on drilling are studied. The experiments and analyses have proved that ultrasonic modulation can improThe advantages of using regular laser pulse spikes for drilling and the selection of pulse spike parameters are discussed. The regulation for ultrasonic modulation of laser pulse spikes and the influence of modulation on drilling are studied. The experiments and analyses have proved that ultrasonic modulation can improve greatly the accuracy, surface finishing and reproducibility..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 20 (1983)
Experimental study on the deposition of ThF4 protective film and its radioactive protection
Sui Zhendong, Wu Binjiang, Ma Minchun, Wang Haiquan, and Kang Guilan
This paper describes the results of ThF4 protective coating on the gold eoatedreflectors.This paper describes the results of ThF4 protective coating on the gold eoatedreflectors..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 26 (1983)
Enhanced absorption of CO2 laser by silicon
Li Yuanheng, and Li Chunjin
The changes of transmissitivy and refletivity of ion-implanted Si with time under intense CW CO2 laser irradiation have been measured. It is discovered that there is enhanced absorption of intense CO2 laser by silicon. This phenomenon may be explained qualitatively by means of free carrier absorption.The changes of transmissitivy and refletivity of ion-implanted Si with time under intense CW CO2 laser irradiation have been measured. It is discovered that there is enhanced absorption of intense CO2 laser by silicon. This phenomenon may be explained qualitatively by means of free carrier absorption..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 28 (1983)
Grating dispersion cavity for CO lasers
Gui Zhenxing, and Zhang Shunyi
This paper reports a grating dispersion cavity used for line selection in CO lasers. Experimental comparison of this cavity with that of conventional grating shows an improvement of wavelength resolution.This paper reports a grating dispersion cavity used for line selection in CO lasers. Experimental comparison of this cavity with that of conventional grating shows an improvement of wavelength resolution..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 30 (1983)
Waveguide effects in the wavequide dye laser
Liu Li, Yi Guoguaug, and Huang Ruiyu
Although the refractive index of the dye solutions is lower than that of the cell material, the reflectivity is high as the light beam grazes at the inner surface of the cell and the solution is of high gain, a number of low order leaky modes can be supported by the leaky waves. Furthemore, the influence of the pump liAlthough the refractive index of the dye solutions is lower than that of the cell material, the reflectivity is high as the light beam grazes at the inner surface of the cell and the solution is of high gain, a number of low order leaky modes can be supported by the leaky waves. Furthemore, the influence of the pump light and the laser beam on the dye solution will bring about the nonuniform distribution of the refractive index of the solution, so the solution can be self-guided. Our experiments and the photos have proved the above analysis..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 32 (1983)
Experimental study on phase conjugate of multimode TEA CO2 lasers
Zou Haixin, Chen Lanyin, and Zhang Baofu
In this paper, we report the phase conjugate effects of multimode TEA CO2 lasers in saturable absorber SF6 and active medium CO2. The reflectivity of multimode phase conjugate wave is close to that of the longitudinal monomode.In this paper, we report the phase conjugate effects of multimode TEA CO2 lasers in saturable absorber SF6 and active medium CO2. The reflectivity of multimode phase conjugate wave is close to that of the longitudinal monomode..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 38 (1983)
Graphite for Ar+ lasers and its treatment
Zhao Jiyan, Jia Tingkui, and Li Shaowu
A new graphite with high strength and low sputtering used in laser systems is reported, and a reasonable technology to increase the treatmant temperature of segmented graphite is also presented. Our test shows that the carbon black graphite can greatly prolong the life-time-of Ar+ lasers.A new graphite with high strength and low sputtering used in laser systems is reported, and a reasonable technology to increase the treatmant temperature of segmented graphite is also presented. Our test shows that the carbon black graphite can greatly prolong the life-time-of Ar+ lasers..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 42 (1983)
Microstructure of hot-forged infrared laser window mrterial KCI
Deng Peizhen, Qiao Jingwen, Qian Zhenying, and Chen Demin
Alkali halide materials, with KCI in particular, have been considered as a promising candidate for high energy laser window.In order to investigate the stability of the mierostructure of hot-forged KCI, the grain boundaries were emerged by chemical etching and observed with a microscope, and incomplete recrystallizatioAlkali halide materials, with KCI in particular, have been considered as a promising candidate for high energy laser window.In order to investigate the stability of the mierostructure of hot-forged KCI, the grain boundaries were emerged by chemical etching and observed with a microscope, and incomplete recrystallization, secondary reerystallization, inhomogeneous microstructure and grain growth in polycrystal KCl were found..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 45 (1983)
Liquid-surface ultrasonic holography
Jiang Jinhu, and Chen Bingguan
This article describes the fundamental principle and experimental setup for liquid-surface ultrasonic, holography and reports the preliminary results in the application of this device to biological medical detection and NDT of industrial materials.This article describes the fundamental principle and experimental setup for liquid-surface ultrasonic, holography and reports the preliminary results in the application of this device to biological medical detection and NDT of industrial materials..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 49 (1983)
Experimental study on lowering the breakdown voltage for laser tubes
Gao Quansheng, Zhang Yufang, and Liu Xin
A number of experiments have preved that the breakdown voltage for gas laser tubes can be dropped by 50% using the modified laser tubes.A number of experiments have preved that the breakdown voltage for gas laser tubes can be dropped by 50% using the modified laser tubes..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 53 (1983)
On the mechanisms of breakdown voltage of gas laser tubes
Ma Younian
This paper presents different views on the mechanism of lowering breakdown voltage of gas laser tubes.This paper presents different views on the mechanism of lowering breakdown voltage of gas laser tubes..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 56 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Misalignment sensitivity of cube corner reflector-concave mirror resonators has been derived by means of augmented 4×4 transfer mataix, and compared with that of plano-concave resonators. The former is lower than the latter in some cases.Misalignment sensitivity of cube corner reflector-concave mirror resonators has been derived by means of augmented 4×4 transfer mataix, and compared with that of plano-concave resonators. The former is lower than the latter in some cases..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 58 (1983)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Frequency shift of Stokes radiation for cells of various lengths were measured. Also measured were light of various intensity generated at 992 cm-1 and 3064 bm-1 for different cell lengths.Frequency shift of Stokes radiation for cells of various lengths were measured. Also measured were light of various intensity generated at 992 cm-1 and 3064 bm-1 for different cell lengths..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 60 (1983)
[in Chinese]
[in Chinese]
The discharge delay technique of cross-excitation in laser microspectroscopy and its main advantages are introduced.The discharge delay technique of cross-excitation in laser microspectroscopy and its main advantages are introduced..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 61 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Pulses of 12 ps in duration were generated from a passively mode-locked Nd: YAG laser using an intracavity etalon.Pulses of 12 ps in duration were generated from a passively mode-locked Nd: YAG laser using an intracavity etalon..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 62 (1983)
[in Chinese]
[in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 64 (1983)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 10, Issue 1, 64 (1983)
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