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Journals >
Chinese Journal of Lasers
Contents
1983
Volume: 10 Issue 5
20 Article(s)
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Research Article
[in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, -1 (1983)
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Laser Devices and Laser Physics
Phase conditions for free electron lasers
Lei Shizhan, Chen Jianwen, and Zhao Donghuan
The phase conditions for free electron lasers are analyzed on the basis of energy equations and Lorentz equations for the interaction of relativistic electrons with magnetostatic field and laser field. It is shown that the energy of relativistic electrons are reduced when the initial phase of incident light lies in the
The phase conditions for free electron lasers are analyzed on the basis of energy equations and Lorentz equations for the interaction of relativistic electrons with magnetostatic field and laser field. It is shown that the energy of relativistic electrons are reduced when the initial phase of incident light lies in the first and the fourth quadrants with respect to the relativistic electron heam. When the initial phase lies in the second and the third quadrants, the relativistic electrons are further accelerated..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 257 (1983)
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Measurement of vibrational displacement and stress of a blade by time-average holographic interferometry
Yu Naixun, and Qiang Shiyi
In this paper, the eomputative formulae used to measure 2-D vibrational displacement and stress in the time-averaged method are derived. By combining the finite element method, the computation for the first-order bending vibration of a blade has been made, and the computable displacement is compared with that, measured
In this paper, the eomputative formulae used to measure 2-D vibrational displacement and stress in the time-averaged method are derived. By combining the finite element method, the computation for the first-order bending vibration of a blade has been made, and the computable displacement is compared with that, measured directly by an eddying sensor. Holograms with as many as forty orders of fringes can be clearly observed, thus expanding the measurable scope of amplitude from 3λ to 10λ..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 261 (1983)
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Experimental study on stability of F
+
2
centers in oxygen doped LiF crystals
Ruan Yongfeng, Wan Lianfeng, and Guo Shaozhang
Experimental study on the stability of F2+ centers in oxygen doped LiF crystals is reported. The mechanism on the decay and stabilization by O of F2+ centres are discussed in detail. Experiments show that the decay process of F2+ centers in LiF is a second order reaction. The measurements of rate constants and activati
Experimental study on the stability of F2+ centers in oxygen doped LiF crystals is reported. The mechanism on the decay and stabilization by O of F2+ centres are discussed in detail. Experiments show that the decay process of F2+ centers in LiF is a second order reaction. The measurements of rate constants and activation energy of F2+ center decay in the range of room temperature indicate that the activation energy increases by about 0.2 eV and the rate constants decrease appreciably in oxygen doped LiF compared with the undoped crystals. A theoretical estimation of the difference of binding energy and that of electron affinity of F2+ centers between doped and undoped LiF crystals is also given briefly..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 269 (1983)
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A Nd glass rod laser amplifier using moving input laser beam
Deng Ximing, Li Chenfu, Wu Sudong, Wo Mingzhen, Ding Liming, Cai Xijie, Cheng Shouhua, Liu Hanxuen, Huang Guanlong, and Zhang Weiqin
The experimental results of a long pulse width Nd-doped glass rod laser amplifier using a moving input laser beam are reported. The damage threshold for the amplifier increases by a factor of over 2 using laser light of 5-10 ms in duration, and the brightness of the amplified output beam increases obviously in comparis
The experimental results of a long pulse width Nd-doped glass rod laser amplifier using a moving input laser beam are reported. The damage threshold for the amplifier increases by a factor of over 2 using laser light of 5-10 ms in duration, and the brightness of the amplified output beam increases obviously in comparison with that of the unmoving ones..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 274 (1983)
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Investigation on semiconductor Si doping by laser irradiation
Du Yuancheng, Sun Diechi, Zhao Yancheng, and Li Fuming
A method is described for semiconductor Si doping of organic colloidal dopants. Both P-type and N-type crystalline Si have been doped using arsenic, phosphor and boron. The electrical and opto-electrical characteristics of the doping area are investigated.
A method is described for semiconductor Si doping of organic colloidal dopants. Both P-type and N-type crystalline Si have been doped using arsenic, phosphor and boron. The electrical and opto-electrical characteristics of the doping area are investigated..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 277 (1983)
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Investigation on tunable lasers pumped by an excimer laser
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
UV laser emission from the dye solutions of P-terphenyl in methanol, ethanol, cyelohexane and P-dioxane pumped by an UV-preionized KrF excimer laser is reported. Laser conversion effieiency is 21% when ethanol is used as solvent. UV tunable laser emission has been obtained in the range of 335.8-345.9 nm with the tuned
UV laser emission from the dye solutions of P-terphenyl in methanol, ethanol, cyelohexane and P-dioxane pumped by an UV-preionized KrF excimer laser is reported. Laser conversion effieiency is 21% when ethanol is used as solvent. UV tunable laser emission has been obtained in the range of 335.8-345.9 nm with the tuned linewidth of-8A..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 281 (1983)
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A tunable LiF:F
2
color center laser
Zhao Jiaju, Zhou Yan, Xie Shengwu, and Lin Jialin
A tunable LiF:F2 color center laser using 0.53μm laser as the pumping source is reported. In this experiment, the concentration of F2 center in crystal is about 6.2×1017 cm-3, a value higher than that previously reported. The linewidth of the tunable laser output around 0.69μm is 1.5 A with an energy conversion ef
A tunable LiF:F2 color center laser using 0.53μm laser as the pumping source is reported. In this experiment, the concentration of F2 center in crystal is about 6.2×1017 cm-3, a value higher than that previously reported. The linewidth of the tunable laser output around 0.69μm is 1.5 A with an energy conversion efficiency of 2.9%. There were no bleaching effects in crystal until 6000 pulses have been shot..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 283 (1983)
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Parametric characteristics of an electrically initiated HF laser
Xu Jie, Cheng Yuming, He Guozhen, and Zhuang Xin
An electrically initiated HF laser of 1J output energy is reported. The influence of the operation parameters on the laser output characteristics are investigated experimentally.
An electrically initiated HF laser of 1J output energy is reported. The influence of the operation parameters on the laser output characteristics are investigated experimentally..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 286 (1983)
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A CW tunable CO laser with two wavelengths
Zhang Shunyi, and Gui Zhenxin
A CW tunable CO laser operating at two wavelengths is reported and the output characteristics for line composition are studied.
A CW tunable CO laser operating at two wavelengths is reported and the output characteristics for line composition are studied..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 289 (1983)
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Measurement of refractive index gradient of inorganic liquid laser system Nd.POCl
3
/ZrCl
4
and the effect of some additives on its dn
D
/dt
Shi Chunshan, and Lu Yuhua
Measurements of expansion coefficients (β) and refractive indexes (nD) and its gradienets (dnD/dt) are described. β, nD and dnD/dt of system POCl3-ZrCl4-Nd (CF3COO)3 are determined and dnD/dt is calculated by means of Gladstone-Dale equation. Elffect ofs 8 additives such as SeCl4 etc. on dnD/dt are studied.
Measurements of expansion coefficients (β) and refractive indexes (nD) and its gradienets (dnD/dt) are described. β, nD and dnD/dt of system POCl3-ZrCl4-Nd (CF3COO)3 are determined and dnD/dt is calculated by means of Gladstone-Dale equation. Elffect ofs 8 additives such as SeCl4 etc. on dnD/dt are studied..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 291 (1983)
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Investigation of laser-induced damage in IR optical crystals
Zhou Liangzhi
A passively mode-locked YAG: Nd laser is used to study the damage in KC1, NaCl and KBr single crystals by picosecond pulse irradiation. Intrinsic breakdown threshold and self-focusing parameters are measured experimentally. The influence of intrinsic factors, such as self-focusing, inclusion and pulse width on the dama
A passively mode-locked YAG: Nd laser is used to study the damage in KC1, NaCl and KBr single crystals by picosecond pulse irradiation. Intrinsic breakdown threshold and self-focusing parameters are measured experimentally. The influence of intrinsic factors, such as self-focusing, inclusion and pulse width on the damage measurement are analysed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 295 (1983)
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Measurement of picosecond absorption recovery time for dye molecules
Li Fuming, Liu Yixian, Chen Lingbing, and Yang Shanyuan
An improved experimental setup for measuring picosecond absorption recovery time is reported. Absorption recovery time for cryptocyanine in ethanol is measured to be 16±3ps. Based on simplified two-level model the relaxation time for upper level of the cryptocyainie molecule is estimated to be 21*4ps.
An improved experimental setup for measuring picosecond absorption recovery time is reported. Absorption recovery time for cryptocyanine in ethanol is measured to be 16±3ps. Based on simplified two-level model the relaxation time for upper level of the cryptocyainie molecule is estimated to be 21*4ps..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 299 (1983)
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Test of laser output performances of Nd:YAG crystals by low energy pumping
Gu Yazhen, and Lin He
Test on YAG: Nd rods of different qualities at low, moderate and CW energy pumping have been made. It is shown that compared to moderate energy pumping, the influence of crystal quality on laser output performances are more obvious.
Test on YAG: Nd rods of different qualities at low, moderate and CW energy pumping have been made. It is shown that compared to moderate energy pumping, the influence of crystal quality on laser output performances are more obvious..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 302 (1983)
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Statistical properties of intensity of partially polarized laser speckle pattern
Wang Naiquan, E Yun, and Zhang Hongjun
A liquid crystal is used as polarized modulator to change the polarizability of optical wave and form the partially polarized laser speckle pattern and the statistical properties of the intensity of partially polarized laser speckle pattern are studied.
A liquid crystal is used as polarized modulator to change the polarizability of optical wave and form the partially polarized laser speckle pattern and the statistical properties of the intensity of partially polarized laser speckle pattern are studied..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 306 (1983)
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Experimental analysis of accuracy for a calibrated equipment with capacitor discharge
Yu Guiqiu, and Huang Guanlong
This paper discusses the dependence of the absolute calibration accuracy on the characteristics of the switch used in the equipment for calibrating calorimeters. When calibrated at lower energies, the accuracy of the button swieth is higher than that of a silicon pontrolled switch.
This paper discusses the dependence of the absolute calibration accuracy on the characteristics of the switch used in the equipment for calibrating calorimeters. When calibrated at lower energies, the accuracy of the button swieth is higher than that of a silicon pontrolled switch..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 309 (1983)
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China emphysizes laser applications-Academia Sinioa holds an exhibition on scientific research achievementa
Zhou Wenguan, and Lu Shunhong
A brief introduction is given to the exhibition on the scientific research achievements sponsored by Academia Sinica from Nov. 27, 1982 to Jan. 8, 1983, with emphasis laying on laser applications in medical science, industry, space and optical fiber communication.
A brief introduction is given to the exhibition on the scientific research achievements sponsored by Academia Sinica from Nov. 27, 1982 to Jan. 8, 1983, with emphasis laying on laser applications in medical science, industry, space and optical fiber communication..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 311 (1983)
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Amplified spontaneous emission and discrimination of radiative spectral characteristics
[in Chinese]
Three methods for discriminating the radiative spectral characteristics are discussed which use the eoherence,distribution of radiative spectram as well as a dip in the side light spontaneous emission.
Three methods for discriminating the radiative spectral characteristics are discussed which use the eoherence,distribution of radiative spectram as well as a dip in the side light spontaneous emission..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 315 (1983)
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[in Chinese]
[in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 317 (1983)
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[in Chinese]
[in Chinese], and [in Chinese]
The results on animal test show that He-Cd laser irradiation could shorten the healing process of the wound induced by a CO2 laser.
The results on animal test show that He-Cd laser irradiation could shorten the healing process of the wound induced by a CO2 laser..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 5, 320 (1983)
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