Journals >Chinese Journal of Lasers
Contents
1986
Volume: 13 Issue 10
19 Article(s)
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Laser Devices and Laser Physics
Classical description of planar channeling radiation for positrons
Shao Mingzhu, and Luo Shiyu
The motion equation of the particles is converted into 2nd order ordinary differential equation with a nonlinear term in the frame of classical physics. The solution of equation, and the oscillation period of particles are represented analytically by Jacobian elliptic function and the 1st kind of complete elliptic inteThe motion equation of the particles is converted into 2nd order ordinary differential equation with a nonlinear term in the frame of classical physics. The solution of equation, and the oscillation period of particles are represented analytically by Jacobian elliptic function and the 1st kind of complete elliptic integral. Some important properties of the radiation are discussed, the maximum radiation energy for the position and the spectral distribution are calculated. The comparison shows essential agreement between the experiment and the theory..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 607 (1986)
Rigorous mode method for studying diffraction properties of optical discs
Ruan Yu, and Zhou Zhiping
The optical disc and its readout system are analyzed. Rigorous mode method is used to set up a mathematical model of the optical disc diffraction process. The proposed Portran-77 computing programs using the appropriate numerical techniques can provide rapid, detailed and numerical solutions. The computing results are The optical disc and its readout system are analyzed. Rigorous mode method is used to set up a mathematical model of the optical disc diffraction process. The proposed Portran-77 computing programs using the appropriate numerical techniques can provide rapid, detailed and numerical solutions. The computing results are in good agreement with those of experiments..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 612 (1986)
New physical explanation of producing phase-conjugate wave in backward stimulated scattering
He Guangsheng, Liu Dun, and Liu Songhao
A new explanation of phase-conjugation (PC) process in backward stimulated scattering (BSS) is given. There are two nonlinear processes occurring simultaneously in BSS: one is pure stimulated scattering,and the other is partly degenarated four-wave-mixing PC process. The close combination of these two processes makes tA new explanation of phase-conjugation (PC) process in backward stimulated scattering (BSS) is given. There are two nonlinear processes occurring simultaneously in BSS: one is pure stimulated scattering,and the other is partly degenarated four-wave-mixing PC process. The close combination of these two processes makes the BSS to be a PC wave to a certain degree. From this point of view we solved the nonlinear coupled-wave equations for the backward SBS and proved that the backward SBS has a perfect PC property only when some particular conditions are satisfied. A four-wave-mixing detecting method was used to investigate this and the experimental results are in good agreement with our theory..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 618 (1986)
Beam propagation characteristics in ring resonators
Lv Baida, and Qin Tali
The beam propagation characteristics in the 8-shaped ring resonator containing four mirrors are calculated and comparied with the standing wave resonator by using-three methods: (1) propagation matrix representation; (2) equivalent sequence of thick lenses, and (3) waist position being selected as the reference developThe beam propagation characteristics in the 8-shaped ring resonator containing four mirrors are calculated and comparied with the standing wave resonator by using-three methods: (1) propagation matrix representation; (2) equivalent sequence of thick lenses, and (3) waist position being selected as the reference developing plane. The influence of astigmatism is also discussed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 623 (1986)
Characteristics of recombination and emission of light in Cd vapor plasma
Wang Yughi, and Chu Zhenxheng
The characteristics of recombination and emission of light in Cd vapor plasma are studied. The influence of various buffer gases and the gas pressures on the Cd vapor plasma are investigated.The characteristics of recombination and emission of light in Cd vapor plasma are studied. The influence of various buffer gases and the gas pressures on the Cd vapor plasma are investigated..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 628 (1986)
Amplification effect of the evanescent wave on LPom modes in the liquid core laser cavity
Liu Li, and Yi Guoguang
Making use of the liquid core optical fiber formed in the waveguide dye laser t ube, have proved the amplification effect of the evanescent wave on LPom modes.Making use of the liquid core optical fiber formed in the waveguide dye laser t ube, have proved the amplification effect of the evanescent wave on LPom modes..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 631 (1986)
A 10 W transverse flow excimer laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A transverse flow excimer laser produces an output power of 10 W at 308nm. The gas reeireulating system and the dosage distribution of X-ray preionization are described, and the effects of gas flow velocity on the laser output are rediscussed.A transverse flow excimer laser produces an output power of 10 W at 308nm. The gas reeireulating system and the dosage distribution of X-ray preionization are described, and the effects of gas flow velocity on the laser output are rediscussed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 635 (1986)
Investigation on laser hardening of high speed steel tools
Sun Kun, Wang Xiu, Hu Bingwen, and Wang Keqin
In this paper characteristics of field pattern distribution by laser hardening and the important parameters are presented. Through analysis on multi-factor tests, the optimum parameters are determined. Test of cutting performance shows that its lifetime can be incre-ased greatly.In this paper characteristics of field pattern distribution by laser hardening and the important parameters are presented. Through analysis on multi-factor tests, the optimum parameters are determined. Test of cutting performance shows that its lifetime can be incre-ased greatly..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 639 (1986)
Encoding of pseudocolor equidensities using combined Ronchi gratings
Zhou Jin, and Gao Wenqi
According to the halftone principle, a screen is introduced which is composed of Ronchi gratings by means of theta modulation. The screen can be used to encode a picture with continuous gray tones. The encoded picture can be demodulated by a spatial filtering system with a polychromatic source. A picture with pseudocolAccording to the halftone principle, a screen is introduced which is composed of Ronchi gratings by means of theta modulation. The screen can be used to encode a picture with continuous gray tones. The encoded picture can be demodulated by a spatial filtering system with a polychromatic source. A picture with pseudocolor of equidensity can be gained.The screen can be made easily and developed into multi-density slices..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 643 (1986)
CW Ar+ laser recrystallization of inP films on SiO2
Lin Chenglu, and Zhu Qing
Polyeystalline InP films are deposited on SiO2 insulating substrate using a conventional EF sputtering equipment. The experimental results show a significant increase in grain size after Ar+ laser irradiation. Analysis of the stoichiometrical rate of InP by Rutherford backscattering spectrometry shows that the decomposPolyeystalline InP films are deposited on SiO2 insulating substrate using a conventional EF sputtering equipment. The experimental results show a significant increase in grain size after Ar+ laser irradiation. Analysis of the stoichiometrical rate of InP by Rutherford backscattering spectrometry shows that the decomposition of InP is greatly suppressed by using a SiO2 encapsulant. Theoretical discussion on the recrystallization mechanism under Ar+ laser irradiation is presented..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 646 (1986)
Experimental research on receiving surface uniformity of large aperture laser calorimeters
Wang Buihua, and Gu Fangping
Receiving surface uniformity of 80 mm aperture bulk absorption glass calorimeters have been measured and studied. The uniformity can be improved by suitably choosing materials thickness of receiver disk and distribution of semiconductor thermoelectric modules. The uniformity error is within ±2.1%.Receiving surface uniformity of 80 mm aperture bulk absorption glass calorimeters have been measured and studied. The uniformity can be improved by suitably choosing materials thickness of receiver disk and distribution of semiconductor thermoelectric modules. The uniformity error is within ±2.1%..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 650 (1986)
Forming of ring profile laser beams and its applications
He Hailin
This paper reports a new and useful optical component-a cylinder converterwith two convex circular cones. It can poavert circular profile of a laser beam into a ring one with given sizes. The principle, structure and choice of parameters are described. Some applications of laser beams with ring profiles are given.This paper reports a new and useful optical component-a cylinder converterwith two convex circular cones. It can poavert circular profile of a laser beam into a ring one with given sizes. The principle, structure and choice of parameters are described. Some applications of laser beams with ring profiles are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 654 (1986)
Investigation of temporal and spatial resolution for laser-material interaction
Zhuang Deunan, and Zhuang Dakui
In the experiment of interaction between laser light and target materials, the luminescence, temperature, the counter action of resultant products on laser light, and the temporal and spatial resolution have been measured.In the experiment of interaction between laser light and target materials, the luminescence, temperature, the counter action of resultant products on laser light, and the temporal and spatial resolution have been measured..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 658 (1986)
Doubt about method of equivalent eonfocal resonators
Lv Baida
Problems concerning the theory of equivalent conf ocal resonators are investigated. It is worth considering the strictness of building up mode theory with the equivalent oonf ocal resonator method.Problems concerning the theory of equivalent conf ocal resonators are investigated. It is worth considering the strictness of building up mode theory with the equivalent oonf ocal resonator method..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 662 (1986)
Eesearch of saturable absorber for colliding pulse mode-locked Nd:YAG lasers
Lin Xing, Zhang Wenshen, Wu Fengtie, Zhuang Huiming, Zheng Yunshan, and Sun Zanao
In this paper, the mode-locking of pentamathylidyne dissolved in various solvents were studied and their averagepulse duration was measured. The mode-locked pulse trains using pentamethylidyne, undeeamethylidyne and BDN as the saturable absorbers were observed ona 600 MHz oscilloscope respectively, and their mode-lockeIn this paper, the mode-locking of pentamathylidyne dissolved in various solvents were studied and their averagepulse duration was measured. The mode-locked pulse trains using pentamethylidyne, undeeamethylidyne and BDN as the saturable absorbers were observed ona 600 MHz oscilloscope respectively, and their mode-locked quality and stability were compared..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 664 (1986)
Measurement of e-beam velocity spread of a Baman free electron laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We have measured the velocity spread of the e-beam of our Raman free-electron laser by considering the Larmor motion of electrons in a finite guiding magnetic field. Measurement shows that the axial velocity spread is 0.1%, satisfying the criteria for collective effects to dominate.We have measured the velocity spread of the e-beam of our Raman free-electron laser by considering the Larmor motion of electrons in a finite guiding magnetic field. Measurement shows that the axial velocity spread is 0.1%, satisfying the criteria for collective effects to dominate..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 666 (1986)
Analysis of 89 eases of oral muco celes cured with Nd:YAG laser light
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Reported here are clinical results of 89 cases of oral mucoceles treated byNd: YAG laser with satisfactory effect.Reported here are clinical results of 89 cases of oral mucoceles treated byNd: YAG laser with satisfactory effect..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 667 (1986)
[in Chinese]
[in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 13, Issue 10, 668 (1986)
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