Journals >Chinese Journal of Lasers
Contents
1981
Volume: 8 Issue 8
24 Article(s)
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Research Article
Laser Devices and Laser Physics
Radiation spectrum of relativistic electrons in a spatially periodic transverse magnetic field
Wang Runwen, and Lei Shizhan
The motion track of relativistic electrons in a spatially periodic transverse magnetic field has been analysed. Under some conditions, the electron motion is harmonic in the direction perpendicular to the original incident one. Radiation spectrum and spectral width have been obtained using harmonic mode, nonhamonie is The motion track of relativistic electrons in a spatially periodic transverse magnetic field has been analysed. Under some conditions, the electron motion is harmonic in the direction perpendicular to the original incident one. Radiation spectrum and spectral width have been obtained using harmonic mode, nonhamonie is also discussed. It has been shown that radiation spectrum depends on the initial electron velocity and the intensity of magnetic tiell..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 1 (1981)
A thermally stable parallel-plane resonator
Li Shize
Theory of Fresnel scale diffraction and imaging rule of optical mode were used to investigate the resonator with internal lens and basic structures of equivalent resonator are introduced. Calculation and analysis show that a parallel-plane resonator with internal lens may be equivalent to the plane-spheric resonator. lTheory of Fresnel scale diffraction and imaging rule of optical mode were used to investigate the resonator with internal lens and basic structures of equivalent resonator are introduced. Calculation and analysis show that a parallel-plane resonator with internal lens may be equivalent to the plane-spheric resonator. l.t is a thermally stable resonator if the alignment of the nsonator mirrors and lens satisfies the formulas derived in this paper. Properties of mode selection of this type of resonator and some design examples are discussed too..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 5 (1981)
Analysis on Q-switching by a shutter Q-switch
Zhu Zhenhe
It is proved that the employment of two-fold or four-fold speed-up deviee is necessary for a shutter Q-switch and there is a slight flicker of the laser beam in the cavity. The mechanism of multi-pul ses generation is explained. The numerical calculation for typical cases is completed with a computer. It is proved thatIt is proved that the employment of two-fold or four-fold speed-up deviee is necessary for a shutter Q-switch and there is a slight flicker of the laser beam in the cavity. The mechanism of multi-pul ses generation is explained. The numerical calculation for typical cases is completed with a computer. It is proved that the performance of the shutter Q-switch will be improved by placing- the prism in a closed cell with gas of suitable refractive index..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 12 (1981)
A 200 Mb/s modulation experiment employing an injection GaAs GaAlAs DH laser
Zhao Luguang, and Zhou Tubo
In this paper, we describe a 200Mb/s modulation experiment employing an injection GaAs-GaAlAs DH laser.The modulation is driven by the bias current below the threshold.In this paper, we describe a 200Mb/s modulation experiment employing an injection GaAs-GaAlAs DH laser.The modulation is driven by the bias current below the threshold..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 19 (1981)
Improvement of pumping performance of flashlamps used for dye laser excitation with intense pulse preionization
Guo Dongsheng, Bong Shuqin, and Li Xiufang
Improvement of the pumping performance of flashlamps used in dye laser excitation with intense pulse preionization as well as the optimum conditions for operation are studied. A simple and reliable circuit has been developed and the laser efficiency has been doubled.Improvement of the pumping performance of flashlamps used in dye laser excitation with intense pulse preionization as well as the optimum conditions for operation are studied. A simple and reliable circuit has been developed and the laser efficiency has been doubled..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 23 (1981)
Investigation of drilling with false concentric resonator of changeable energy
Sun Kun, Song Keliang, Bao Shanfei, Li Weijun, and Liu Shokui
At present, plane parallel resonator is often used in multipulse laser drilling with average distribution of pulse energy. We consider it is disadvantageous in regard to accuracy, surface finishing and reproducibility for the drilled holes. Through analysis and experiments on output characteristics of resonators as welAt present, plane parallel resonator is often used in multipulse laser drilling with average distribution of pulse energy. We consider it is disadvantageous in regard to accuracy, surface finishing and reproducibility for the drilled holes. Through analysis and experiments on output characteristics of resonators as well as rational distribition of pulse, energy, improvement in accuracy, surface finishing and repoducibility of the .drilled holes can be achieved, especially in improving their taper, by using false concentric resonator with changeable energy..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 26 (1981)
Study of parameters in pulsed laser welding
Tsao Mincui, Zheng Qiguang, and Sun Shuhua
Selection of laser pulse shape, pulse duration, flux density are discussed in pulsed laser microwelding and the experimental results are given.Selection of laser pulse shape, pulse duration, flux density are discussed in pulsed laser microwelding and the experimental results are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 31 (1981)
Pulsed xenon flashlamps and filter envelopes made of quartz tubes and their use in lasers
Tsa Guigen, Li Xindi, and Qian Jianming
In pulsed flashlamps and filter envelopes made of quartz tubes with appropriate thickness and proper concentration of doped rare-earth elements, such as cerium, europium etc, UV radiation below 3500 A is essentially eliminated, thus filter solution and yellow glass filter envelopes in solid state lasers can be replacedIn pulsed flashlamps and filter envelopes made of quartz tubes with appropriate thickness and proper concentration of doped rare-earth elements, such as cerium, europium etc, UV radiation below 3500 A is essentially eliminated, thus filter solution and yellow glass filter envelopes in solid state lasers can be replaced and the colouring of laser material prevented.Comparison has been made among filtering characteristics of different filter materials and their efficiencies in repetitive pulse Nd:YAG lasers. Experimental results show that using doped-quartz in Nd:YAG laser and Nd:glass lasers, laser efficiency can be increased by (25-100)%, or even higher..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 39 (1981)
Losses of optical thin films
Fan Zhenxiu
Three types of loss factors-surface scattering, volume scattering and absorptance for optical thin films have been systematically analysed and calculated. The reflectivity, transmissitivity and losses of the optical thin /Jims were calculated with these factors existing simultaneonsly. In computing program, the effectsThree types of loss factors-surface scattering, volume scattering and absorptance for optical thin films have been systematically analysed and calculated. The reflectivity, transmissitivity and losses of the optical thin /Jims were calculated with these factors existing simultaneonsly. In computing program, the effects of various loss factors on optical properties of thin films have been taken into account, so the computed model and ways are more universal than the ordinary ones. As examples the computed results for eleven layers of ZnS/MgF2 reflective coating and twenty-one layers of TiO2/SiO2 reflective coating are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 45 (1981)
A cold cathode He-Cd laser of high power and long lifetime is reported. Maximum monomode output of over 100 mW has been obtained with a discharge length of 140 to 150 cm. The lifetime is over 3500 hours when the output is 50 mW with a dischage length of 125 cm.
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 54 (1981)
[in Chinese]
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This paper describes a mixed dielectric waveguide laser glued by polished quarts plates and polished copper plates, with cross section of 1mm×1mm. Preliminary results on CO2 laser output from multiple transverse synchronous discharge in waveguide filled with He, N2 and CO2 gas mixtures are reported.This paper describes a mixed dielectric waveguide laser glued by polished quarts plates and polished copper plates, with cross section of 1mm×1mm. Preliminary results on CO2 laser output from multiple transverse synchronous discharge in waveguide filled with He, N2 and CO2 gas mixtures are reported..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 55 (1981)
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In the experiments on laser heating of plasma, angular distribution of laser beam energy is measured by array imaging. In combination with the principles of equivalent planes, the time-integrated energy distribution was meaured at the focal plane and various planes out of focus of target lens.In the experiments on laser heating of plasma, angular distribution of laser beam energy is measured by array imaging. In combination with the principles of equivalent planes, the time-integrated energy distribution was meaured at the focal plane and various planes out of focus of target lens..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 56 (1981)
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[in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 59 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 59 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 60 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 60 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 62 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 62 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 63 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 64 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 64 (1981)
[in Chinese]
[in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 65 (1981)
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Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 8, Issue 8, 65 (1981)
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