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Journals >
Chinese Journal of Lasers
Contents
1986
Volume: 13 Issue 2
18 Article(s)
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Laser Devices and Laser Physics
[in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 1 (1986)
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Computer analysis by lens array for uniform illumination
Chen Zezun, Liang Xiangchun, and Deng Ximing
It is advantageous to use lens array for uniform illumination of high-power laser targets 1 . By using the computer analysis of the optical field on the targets, the characteristics of this way have been studied. In the present report, we propose a star-shaped arrangement of the concentricity deviation of the lens arra
It is advantageous to use lens array for uniform illumination of high-power laser targets 1 . By using the computer analysis of the optical field on the targets, the characteristics of this way have been studied. In the present report, we propose a star-shaped arrangement of the concentricity deviation of the lens array elements. This enables us to concentrate the two-dimensional interference pattern and can meet the requirements of the uniformity and experiments..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 65 (1986)
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Study on two physical machanisms for high order coherent Raman radiation
He Guangsheng, Zhou Fuxin, Liu Dun, and Liu Songhao
High order coherent Raman radiation caused by two different mechanisms in the stimulated Raman scattering experiments have been studied. One is the cascade stimulated scattering process, the other is Raman-resonance enhanced four-wave mixing which is characterized by phase matching condition and causes a hollow ring di
High order coherent Raman radiation caused by two different mechanisms in the stimulated Raman scattering experiments have been studied. One is the cascade stimulated scattering process, the other is Raman-resonance enhanced four-wave mixing which is characterized by phase matching condition and causes a hollow ring distributtion in the near-field. Experimental results judgement . using calcite sample have shown that these two physical processes can appear separately or simultaneously depending on the experimental conditions..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 71 (1986)
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Rate equation of four-level systems depending evidently on geometric parameters of the cavity
Gu Qiao
The rate equation of four-level systems which depends on the geometric parameters of the cavity evidently has been obtained by means of the equations for radiation-matter interaction. A relation satisfied by the geometric parameters of the laser cavity with stabiliezd power has been derived from the rate equation.
The rate equation of four-level systems which depends on the geometric parameters of the cavity evidently has been obtained by means of the equations for radiation-matter interaction. A relation satisfied by the geometric parameters of the laser cavity with stabiliezd power has been derived from the rate equation..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 76 (1986)
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Gain characteristics of free-electron lasers using Smith-Purcell effect
Zhang Dake
Coupled-mode approach and electron Bloch equations are combined to calculate the gain of free-electron lasers using Smith-Purecell effect in the gain quantum model. The possibility of increasing gain by changing the spatial frequency of the grating is studied.
Coupled-mode approach and electron Bloch equations are combined to calculate the gain of free-electron lasers using Smith-Purecell effect in the gain quantum model. The possibility of increasing gain by changing the spatial frequency of the grating is studied..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 80 (1986)
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Diffraction of layered phase grating and its application in measurement and test
Wang Baocheng
The calculation formulae derived in the paper can provide .important basis for the design and quality control of optical elements. This single periodic layered phase grating provides a new kind of element for precision measurements and its application in measurement and test is introduced.
The calculation formulae derived in the paper can provide .important basis for the design and quality control of optical elements. This single periodic layered phase grating provides a new kind of element for precision measurements and its application in measurement and test is introduced..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 86 (1986)
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Laser spectroscopic study on HCD lamps as a metal atomic vapor source
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
In this paper we report the experimental study of the metal atomic vapor, opto-galvanic effect and laser fluorescence in the HCD lamps. The fact that the observed lifetime of Cu 4p2P3/2 state increases with the discharge current is attributed to the radiation-trapping.
In this paper we report the experimental study of the metal atomic vapor, opto-galvanic effect and laser fluorescence in the HCD lamps. The fact that the observed lifetime of Cu 4p2P3/2 state increases with the discharge current is attributed to the radiation-trapping..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 91 (1986)
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Measurement of shape and width of mode-locked Ar
+
laser pulses by cross-correlation method
Guan Xinan, Yuan Shuzhong, and Lu Fuyun
Cross-correlating the mode-locked dye laser pulses and mode-locked Ar+ laser pulses in a KDP cristal plate, we determined that the pulse width of mode-locked Ar+ laser at 514.5 nm(or 488.0 nm) is about 210 ps and the pulse shape is of Gaussian type.
Cross-correlating the mode-locked dye laser pulses and mode-locked Ar+ laser pulses in a KDP cristal plate, we determined that the pulse width of mode-locked Ar+ laser at 514.5 nm(or 488.0 nm) is about 210 ps and the pulse shape is of Gaussian type..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 96 (1986)
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Instrumentation for rapid determination of reflective and transmissive spectra
Wang Bingkui, Li Weide, Zhang Zhiming, Li Ruiyong, and Sheng Yuchin
An effective and precision apparatus for rapid determination of optical reflective and transmissive spectra is described. By using a rapid rotating optical fiber to sample the incident and reflected or transmitted light beams respectively and feedback of the incident beam intensity to monitor the gain of the photomulti
An effective and precision apparatus for rapid determination of optical reflective and transmissive spectra is described. By using a rapid rotating optical fiber to sample the incident and reflected or transmitted light beams respectively and feedback of the incident beam intensity to monitor the gain of the photomultiplier for keeping the incident photo-current under constant level, the measured signal gives the transmissivity or reflectivity directly. Besides, due to rapid scanning of the sampled signals the requirement 04 the steadiness of the light source is not critical. The relative accuracy of the measurements in the range of 410nm to 650 nm is less than 2% and the time for scanning the complete visible spectrum is 2 minutes..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 99 (1986)
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Analysis of laser collimating system with a nagetive adjustment lens
Wang Lixing
The effects of offseting of negative adjustment lens on the characteristics of the laser collimating system is emphatically analyzed. A practical design method is suggested.
The effects of offseting of negative adjustment lens on the characteristics of the laser collimating system is emphatically analyzed. A practical design method is suggested..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 104 (1986)
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Optical absorption coefficient of magneto-optic garnet films
Liu Gongqiang, Yu Zhiqiang, and Liu Xianglin
This paper analyses various factors leading to optical attenuation in magneto-optic grauet films and derives expressions of optical absorption coefficient a and optical scattering coefficient γ. Values of a and 7 of (BiTm)3(FeGa)5O12 films were measured on the magnetooptic rotation measurement installation by means of
This paper analyses various factors leading to optical attenuation in magneto-optic grauet films and derives expressions of optical absorption coefficient a and optical scattering coefficient γ. Values of a and 7 of (BiTm)3(FeGa)5O12 films were measured on the magnetooptic rotation measurement installation by means of the comparison method of the magneto-optic modulation.By comparison with an ordinary method, it can not only eliminate effect of absorption in a substrate and reflection on the interface between a film and a substrate upon measuring the value of a of garnet films, but also separate optical scattering coefficient γ from optical absorption coefficient a, so that the measured value of a comparatively approaches the true value of optical absorption coefficient of magneto-optic garnet film materials..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 108 (1986)
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Large current rectangular pulsed laser power supply
Xue Bin, Wang Tongyi, and Yao Jianquan
By combining thyristor switch with large power transistor, large current rectangular pulsed laser power supply with stable smooth top is obtained,pulsed current of 80A and top current fluctuation within 2% are achieved.
By combining thyristor switch with large power transistor, large current rectangular pulsed laser power supply with stable smooth top is obtained,pulsed current of 80A and top current fluctuation within 2% are achieved..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 112 (1986)
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A CW LiF:F
-
2
color center laser
Song Zheming, Sun Jun, Cao Wenshi, and Song Lingfeng
A CW and quasi-CW LiP:F2- color center laser pumped by YAG:Nd3+ laser (λ=1.06μm) is reported. The output power is 300 mW and 150 mW respectively. Laser emission wavelength ranges from 1.10 to 1.25μm.The laser can operate stably at room temperature.
A CW and quasi-CW LiP:F2- color center laser pumped by YAG:Nd3+ laser (λ=1.06μm) is reported. The output power is 300 mW and 150 mW respectively. Laser emission wavelength ranges from 1.10 to 1.25μm.The laser can operate stably at room temperature..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 116 (1986)
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Stimulated Baman effect of dichloroethane
Meng Shaoxian, Zhang Weiqing, and Kang Yuying
Diehloroethane pumped with green ultrashort light pulse is investigated. The cause of Eaman light is analysed and its effect on mode-locked lasers is pointed out.
Diehloroethane pumped with green ultrashort light pulse is investigated. The cause of Eaman light is analysed and its effect on mode-locked lasers is pointed out..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 118 (1986)
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Atmospheric nitrogen laser with a single block of ceramics
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
This paper reports the experimental research for atmospheric pressure nitrogen laser or snort tube, with a single block ceramics as dielectric. When the laser discharge electrode is 5.8cm in length, we got pulse energy of 13μJ at 100 Hz, with a maximum average power of 1.3mW, pulse width of 0.8ns, beam divergence of 1.
This paper reports the experimental research for atmospheric pressure nitrogen laser or snort tube, with a single block ceramics as dielectric. When the laser discharge electrode is 5.8cm in length, we got pulse energy of 13μJ at 100 Hz, with a maximum average power of 1.3mW, pulse width of 0.8ns, beam divergence of 1.3×3 mrad..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 119 (1986)
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Selection of conditions for optogalvanic spectral analysis
Gui Zhenxing, Wang Yumin, and Zhang Shunyi
The optogalvanic responeivity E for He-Xe, He-Ne-Xe gas mixtures has beenmeasured. It has been found that the dependence of lg RXe/RHe on ly PXe/P0 is a linear one. Theinfluence of the pressure, discharge current, analytical line and gas compound on analytical sensitivity and accurary have been studied in particular.
The optogalvanic responeivity E for He-Xe, He-Ne-Xe gas mixtures has beenmeasured. It has been found that the dependence of lg RXe/RHe on ly PXe/P0 is a linear one. Theinfluence of the pressure, discharge current, analytical line and gas compound on analytical sensitivity and accurary have been studied in particular..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 121 (1986)
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LS-Ⅱ argon ion gas laser stabilized power meter
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The meter can be widely used in testing, cell analysis, laser protection, information processing and storage, electronic-color separation and instrument calibration etc. The meter has high power stability, low insertion loss and compat structure. Power stabilization is up to ±0.15%/hr.
The meter can be widely used in testing, cell analysis, laser protection, information processing and storage, electronic-color separation and instrument calibration etc. The meter has high power stability, low insertion loss and compat structure. Power stabilization is up to ±0.15%/hr..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 124 (1986)
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High accuracy laser wavemeter
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Model XCD-1 laser wavemeter is an interferometer with single corner-cube reflector. It can avoid cross-coupling between lasers. A calculator is used for calculation in the circuit. The influence of the lasing interruption of the dye laser can be eliminated by the phase-locked frequency multiplication technique and the
Model XCD-1 laser wavemeter is an interferometer with single corner-cube reflector. It can avoid cross-coupling between lasers. A calculator is used for calculation in the circuit. The influence of the lasing interruption of the dye laser can be eliminated by the phase-locked frequency multiplication technique and the envelope detection,automatic resetting. The wavemeter is calibrated with the saturated absorption of the spectral line of 23Na atom. Its absolute accuracy is up to 2 × 10-7..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 13, Issue 2, 126 (1986)
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