Journals >Chinese Journal of Lasers
Contents
1985
Volume: 12 Issue 1
20 Article(s)
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Research Article
Laser Devices and Laser Physics
Research on optic spatial frequency analysis of linear structures in remote sensing images
Zhu Ziqiang, Chen Zhenpei, Li Jitao, and Tang Guangjie
This paper describes the fundamental principle and experimental method for spatial frequency analysis of the linear structures in remote sensing images. The faint geologic structures in ERTS image of Yanting county, Sichuan province have been analysed by this method, and useful results obtained.This paper describes the fundamental principle and experimental method for spatial frequency analysis of the linear structures in remote sensing images. The faint geologic structures in ERTS image of Yanting county, Sichuan province have been analysed by this method, and useful results obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 1 (1985)
Real-time optical correlation processing with Fe:LiNbO3 crystal
Lu Tuansun, Liu Wenhu, Zhang Hongjun, Dai Jianhua, Wang Pengye, and Xu Liangying
A method of real-time optical correlation processing with Fe: LiNbO3 is reported. The experimental results consistent with theory are given.A method of real-time optical correlation processing with Fe: LiNbO3 is reported. The experimental results consistent with theory are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 6 (1985)
Frequency-selection and mode-locking of Nd:YAG laser
Tang Guisheng, and Qiu Peixia
Mode-locking of Nd: YAG laser has been achieved at four spectral lines(1.052μm, 1.061μm, 1.064μm and 1.073μm)by inserting prisms as dispersion elements in the cavity. The calculations on prisms are consistent with the experimental results. The stable output wavelength of the laser has been obtained.Mode-locking of Nd: YAG laser has been achieved at four spectral lines(1.052μm, 1.061μm, 1.064μm and 1.073μm)by inserting prisms as dispersion elements in the cavity. The calculations on prisms are consistent with the experimental results. The stable output wavelength of the laser has been obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 11 (1985)
Laser active color center F_B(Ⅱ)in KCl:Na crystals
YOu Lu, Li Ping, Li Shenghua, Fang Shugan, Wei Shouzu, He Shaoqi, and Wang Kuihua
By using additive coloration method, the F-center concentration of 1016～1018cm-3in KCl: Na crystals is obtained. FB(Ⅱ)center is formed by exposing the additively colored crystal to F-band excitation, and its emission band at 77K covers the range of 2.1 to 2.8 μm, and the peak is at 2.5μm.By using additive coloration method, the F-center concentration of 1016～1018cm-3in KCl: Na crystals is obtained. FB(Ⅱ)center is formed by exposing the additively colored crystal to F-band excitation, and its emission band at 77K covers the range of 2.1 to 2.8 μm, and the peak is at 2.5μm..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 15 (1985)
A large area X-ray source and it’s preionization characteristics for XeCl excimer laser
Lou Qihong, Wang Renwen, Cheng Xushan, Huo Yunsheng, Wei Yunrong, Ding Aizhen, and Zheng Chengen
A large area cold cathode diode X-ray source and it＇s performances, dosage distribution along with the laser tube and the effects of X-ray intensity on the laser output energy have been investigated experimentally.A large area cold cathode diode X-ray source and it＇s performances, dosage distribution along with the laser tube and the effects of X-ray intensity on the laser output energy have been investigated experimentally..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 20 (1985)
Experimental investigation on electron recombination characteristics of plasma
Wang Yuzhi, Dong Jingxing, and Xie Peiliang
Temporal and spatial characteristics of electron recombination in plasma have been studied by using a double cylindrical probe.Temporal and spatial characteristics of electron recombination in plasma have been studied by using a double cylindrical probe..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 22 (1985)
Ring cavity CO2 laser for branch-selection and narrow resonance produced by SF6 in cavity
Huang Yongkai, and Rong Jianmin
A new type of branch-selected ring CO2 laser is described. Laser output at the vibration-rotation lines has been obtained at 9.5μm and 10.6μm. The narrow resonance behavi-our of SF6 in the cavity has been observed.A new type of branch-selected ring CO2 laser is described. Laser output at the vibration-rotation lines has been obtained at 9.5μm and 10.6μm. The narrow resonance behavi-our of SF6 in the cavity has been observed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 25 (1985)
Synthesis of He-Ne laser frequency at 88 THz
Ni Yucai, Yan Hanmei, Ma Mingde, and Lin Jian
The beat signals of the harmonic mixing between He-Ne laser at 3.39μm, CO2 laser and microwave radiation of the klystron has been observed by using a W-Ni point contact MIM diodeu as the harmonic generator and mixer. The signal to noise ratio obtained was 22 dB at the bandwidth of 50 kHz.The beat signals of the harmonic mixing between He-Ne laser at 3.39μm, CO2 laser and microwave radiation of the klystron has been observed by using a W-Ni point contact MIM diodeu as the harmonic generator and mixer. The signal to noise ratio obtained was 22 dB at the bandwidth of 50 kHz..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 29 (1985)
Proton-exchanged optical waveguides in Ti:LiNbO3
Zheng Jianhe, Li Yushan, Wang Shurong, Huang Kuan, and Yu Rongjin
We report the method, condition for the single-mode waveguide, index profile, exchange coefficient, surface state and thermal stability of optical waveguides formed in Ti: LiNbO3 substrate by proton exchange in benzoic acid.We report the method, condition for the single-mode waveguide, index profile, exchange coefficient, surface state and thermal stability of optical waveguides formed in Ti: LiNbO3 substrate by proton exchange in benzoic acid..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 32 (1985)
Output wavelength measurement of a branch selected CO laser by OGE
Gui Zenxing, Wang Yumin, Zhang Shunyi, and Feng Jianzhong
A simple method is presented for measuring output wavelength of a CW branch-selected CO laser by OGE. The measured result is in agreement with that by a monochromator.A simple method is presented for measuring output wavelength of a CW branch-selected CO laser by OGE. The measured result is in agreement with that by a monochromator..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 37 (1985)
Fiber-optic transmission system for an experimental pulsed YAG:Nd laser apparatus used in decayed tooth prevention
Jiang Chengqi, and Tang Chengfu
The structure of a fiber-optic transmission system is described. Some parametric computing formulae are derived with an optical fiber with spherical end used for out-of-focusing coupling, and by means of this, the laser-induced damage on fiber flat end face is eliminated in the case of inserting a pulsed YAG: Nd laser The structure of a fiber-optic transmission system is described. Some parametric computing formulae are derived with an optical fiber with spherical end used for out-of-focusing coupling, and by means of this, the laser-induced damage on fiber flat end face is eliminated in the case of inserting a pulsed YAG: Nd laser beam into the fiber..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 43 (1985)
Pb1-xSnxTe and Pb1-ySnySe laser crystals
Zhu Xiaochun, Cao Gendi, Zhang Weizai, and Wang Hailong
This paper reports the Pb1-x SnxTe and Pb1-ySnySe crystals which have the suitable carrier concentration, low dislocation densities and a proper depth of P-N junction. The crystals have been directly obtained by a horizontal unseeded vapor growth technique at an ap-propriate controlling condition for crystal growth. ThThis paper reports the Pb1-x SnxTe and Pb1-ySnySe crystals which have the suitable carrier concentration, low dislocation densities and a proper depth of P-N junction. The crystals have been directly obtained by a horizontal unseeded vapor growth technique at an ap-propriate controlling condition for crystal growth. They have been used in fabricating the CW tunable diode lasers..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 48 (1985)
Growth and spectra of K3Nd(PO4)2 laser crystals
Hong Guangyan, and Zhang Qinghuan
Crystals of K3Nd(PO4)2 and K3NdxLa1-x(PO4)2 have been grown from KF-KCl melt. Chemical analysis and X-ray diffraction pattern proved the constitution of the crystals to be K3Nd(PO4)2. Their infrared, absorption, fluorescene spectra and fluorescence lifetime have been determined.Crystals of K3Nd(PO4)2 and K3NdxLa1-x(PO4)2 have been grown from KF-KCl melt. Chemical analysis and X-ray diffraction pattern proved the constitution of the crystals to be K3Nd(PO4)2. Their infrared, absorption, fluorescene spectra and fluorescence lifetime have been determined..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 51 (1985)
Research on laser-induced damage in KDP crystals at different wavelengths
Li Chengfu, Zhang Meizhen, and Guo Juping
Laser-induced damage thresholds in KDP crystals at two polarization directions(i.e. parallel or pcrpendicular to the optical axis)have been measured at 1.06,0.532 and 0.355μm. It is found that the damage threshold sharply decreases as laser frequency increases. The experi-mental result shows that laser-induced damage iLaser-induced damage thresholds in KDP crystals at two polarization directions(i.e. parallel or pcrpendicular to the optical axis)have been measured at 1.06,0.532 and 0.355μm. It is found that the damage threshold sharply decreases as laser frequency increases. The experi-mental result shows that laser-induced damage in KDP crystals is mainly due to multiphoton ionization..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 54 (1985)
[in Chinese]
[in Chinese], and [in Chinese]
The calculating formulae and design basis of the shock-attenuation table with two stages for holographic equipments and optical precision instruments are presented. A number of examples illustrate that the stability of this table may be an order of magnitude higher than that with one stage.The calculating formulae and design basis of the shock-attenuation table with two stages for holographic equipments and optical precision instruments are presented. A number of examples illustrate that the stability of this table may be an order of magnitude higher than that with one stage..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 57 (1985)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
The existence of de-excitation effect is verified experimentally and the to eliminate this effect is proposed.The existence of de-excitation effect is verified experimentally and the to eliminate this effect is proposed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 59 (1985)
[in Chinese]
[in Chinese]
A new He-Ne laser power supply with current stabilizer using silicon controlled rectifier is described. The power supply has the feutures of simplicity, high stability and low cost.A new He-Ne laser power supply with current stabilizer using silicon controlled rectifier is described. The power supply has the feutures of simplicity, high stability and low cost..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 60 (1985)
[in Chinese]
[in Chinese]
Clinical observetion on prophylasis of anorectal incisional infection by low power He-Ne laser irradiation is reported.Clinical observetion on prophylasis of anorectal incisional infection by low power He-Ne laser irradiation is reported..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 62 (1985)
[in Chinese]
[in Chinese], and [in Chinese]
Observation on curative effect of 30 cases of erysipelas with low power He-Ne laser irradiation of accupucture points is reported.Observation on curative effect of 30 cases of erysipelas with low power He-Ne laser irradiation of accupucture points is reported..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 12, Issue 1, 62 (1985)
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