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Journals >
Chinese Journal of Lasers
Contents
1987
Volume: 14 Issue 9
19 Article(s)
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Research Article
[in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 1 (1987)
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Laser Devices and Laser Physics
A high power atomic iodine amplifier with an aperture of 320 mm
Chen Shisheng, G. Brederlow, E. Fill, J. K. Witte, and S. Witkowski
We have developed high power atomic iodine laser amplif er with an aperture of 320 mm and length of 1.4m. Its conversion efficiency reaches to 0.8%. The cross section of the amplif er is better than 4%. The diffraction index change during the pumpimg period is less than 2x 10-7. Experimental results show that the empir
We have developed high power atomic iodine laser amplif er with an aperture of 320 mm and length of 1.4m. Its conversion efficiency reaches to 0.8%. The cross section of the amplif er is better than 4%. The diffraction index change during the pumpimg period is less than 2x 10-7. Experimental results show that the empirical formula D P=20000(Pa.cm), in which P is the pressure of active material C3F7I inside the laser tube and D the diameter of an amplifer, is suitable for choosing parameters of amplifera..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 513 (1987)
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Effect of charged particle self-field on the gain of FEL’s
Zhao Donghuan, and Lei Shishan
Considering the condition of charged particle self-field the gain of FEL is studied and compared to the results obtained by neglecting the self-field. It is shown that self-field has some effects on the gain of the FEL’s.
Considering the condition of charged particle self-field the gain of FEL is studied and compared to the results obtained by neglecting the self-field. It is shown that self-field has some effects on the gain of the FEL’s..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 518 (1987)
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Pulsed laser characteristics of neodymium aluminum borate [NdAl
3
(BO
3
)
4
] (NAB) crystals
Huang Yichuan, Qiu Minwang, Chen Guang, Chen Jiming, and Luo Zundu
This paper presents the pulsed laser eharateristics of laser NAB crystals grown in our institute. The maximum laser outpu t of a NAB rod with dimensions of 3. 2mm X 23. 7mm was 422mJ a pulse when it was pumped with a single xenon flashlamp. The laser threshold of a NAB crystal rod with dimensions of 1.8mmX 2.4mm was de
This paper presents the pulsed laser eharateristics of laser NAB crystals grown in our institute. The maximum laser outpu t of a NAB rod with dimensions of 3. 2mm X 23. 7mm was 422mJ a pulse when it was pumped with a single xenon flashlamp. The laser threshold of a NAB crystal rod with dimensions of 1.8mmX 2.4mm was determined to be 67mJ. By using BDN dye for switching, the laser pulse width of a NAB rod with dimensions of 1.8minx8.4 mm was 8ns. The output laser beam was linearly polarized with beam divergence angle of about 2mrad and wavelength of A=1.063 μm..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 524 (1987)
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AM and FM noise in a semiconductor laser
Li Linlin, Wang Zhiguang, and Yang Enze
The influences of the thermal radiation, field zero-point fluctuation and spontaneous emission on the AM and FM noise in a semiconductor laser are studied theoretically.
The influences of the thermal radiation, field zero-point fluctuation and spontaneous emission on the AM and FM noise in a semiconductor laser are studied theoretically..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 529 (1987)
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Phase matching by intensity-dependent refraction index
Li Binxue, Huang Yongkai, Li Qun, and Liu Yashu
Phase matching for harmonics and frequency mixing by intensity-dependent refraction index e_ffcts is presented, in this way phase-matched third harmonic generation in Ba vapor has been realized for the first time.
Phase matching for harmonics and frequency mixing by intensity-dependent refraction index e_ffcts is presented, in this way phase-matched third harmonic generation in Ba vapor has been realized for the first time..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 533 (1987)
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A novel holographic encoding filter for correlation
Wang Xuming, Wang Zhaoqi, and Mu Guoguang
A novel filter for correlation is presented which; behaves as intensity correlatpr along with other elements and has the common advantages of intensity correlators.This lensless intensity correlation system is simple and easy to operate and decreases the requirement of resetting precision for the filter.
A novel filter for correlation is presented which; behaves as intensity correlatpr along with other elements and has the common advantages of intensity correlators.This lensless intensity correlation system is simple and easy to operate and decreases the requirement of resetting precision for the filter..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 537 (1987)
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Measurement of 3-D displacement vector using phase-comparison on Fourier transform plane
Chen Mingyi, and Hua Jianwen
Investigation of the phase change on Fourier transform plane caused by a moving object shows that it is possible to measure a 3-D displacement vector using comparison of the phase-change recorded on a double exposure hologram. Based on it, a novel approach for measuring a 3-D displacement vector is described here. Theo
Investigation of the phase change on Fourier transform plane caused by a moving object shows that it is possible to measure a 3-D displacement vector using comparison of the phase-change recorded on a double exposure hologram. Based on it, a novel approach for measuring a 3-D displacement vector is described here. Theoretical analysis shows that the problems usually appeare during interpreting the interferograms of a conventional double exposure hologram for 3-D, displacement measurement have been effectively avoided. Experimental results are well coincident with theoretical analysis. Quantitative calculation method ia also presented..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 540 (1987)
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Si-photocell with ultra-shallow junction by GILD and its characteristics
Zhou Zhengzhuo, Li Ding, Qiu Mingxin, and Zhou Yuliang
By means of GILD(gas immersion laser doping)on the surfaces of n-Si samples with BBra vapor as material, Si-photo-cells doped with boron have been manufactured with the maximum doping concentration of 1.2x 1021 B+/cm3 near the surface, the junction depth of 0.08/am at 1017 B+/cms and the conversion efficiency of about
By means of GILD(gas immersion laser doping)on the surfaces of n-Si samples with BBra vapor as material, Si-photo-cells doped with boron have been manufactured with the maximum doping concentration of 1.2x 1021 B+/cm3 near the surface, the junction depth of 0.08/am at 1017 B+/cms and the conversion efficiency of about 9.5% without antireflection coatings..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 544 (1987)
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Laser cladding of FeCrSiB alloy
Yang Xichen, Yan Yuhe, Wang Xiangkai, and Gu Hongwu
Laser cladding of FeCrSiB alloy coatings on A3 steel plate has been performed with a 5kW CcO2 laser. The microstrueture and performance have been significantly improved. Laser cladding casing consist of a’-Fe+y-Fe+M23O6+M7C3+Fe2B. Excellent performances of surface alloy have been, obtained on low priced steel plate. It
Laser cladding of FeCrSiB alloy coatings on A3 steel plate has been performed with a 5kW CcO2 laser. The microstrueture and performance have been significantly improved. Laser cladding casing consist of a’-Fe+y-Fe+M23O6+M7C3+Fe2B. Excellent performances of surface alloy have been, obtained on low priced steel plate. It is shown that laser cladding ia via-ble for controllably modified aiaterialS aurface..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 548 (1987)
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Optical correction of laser-Doppler-anemometry of cylindrical tube flow
Li Qien
A calculating procedure for optical correction of LDA measurement of cylindrical tube flow is presented. The calculated deviation error is less than 1.86 x10-11 in the ideal case of the tube filled with liquids having the same refractive index as the tube wall. This method can also be used to predict the position limit
A calculating procedure for optical correction of LDA measurement of cylindrical tube flow is presented. The calculated deviation error is less than 1.86 x10-11 in the ideal case of the tube filled with liquids having the same refractive index as the tube wall. This method can also be used to predict the position limit of the measured points..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 553 (1987)
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A new method for improving line discrimination of CO2 waveguide lasers
Wang Bo
Measuring the variation of the output" power of a waveguide CO2 laser with coupling distance for different curvatures of the cavity mirror, a minimal coupling loss point is obtained. Experimental results show that the frequency tuning range can thus be increased.
Measuring the variation of the output" power of a waveguide CO2 laser with coupling distance for different curvatures of the cavity mirror, a minimal coupling loss point is obtained. Experimental results show that the frequency tuning range can thus be increased..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 558 (1987)
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Output power of dye laser pumped by Cu vapor laser with different oscillator structures
[in Chinese], and [in Chinese]
By meana of experiment and simple theory; we investigated the output’ power of the tunable dye laser pumped by a Cu vapor laser with planar and concave mirrors used as the front mirror of the dye laser respectively. The experimental result shovs that for the same oscillator length there is a higher output pbwer for the
By meana of experiment and simple theory; we investigated the output’ power of the tunable dye laser pumped by a Cu vapor laser with planar and concave mirrors used as the front mirror of the dye laser respectively. The experimental result shovs that for the same oscillator length there is a higher output pbwer for the concave one than that for the planar one, which agrees with our theory..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 560 (1987)
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Phase noise of single mode semiconductor lasers
Ye Jiaxiong
Following Langevin rate equations, the expressions of phase noise power spectrum density are obtained and the results in good agreement with experiment and calculations are given.
Following Langevin rate equations, the expressions of phase noise power spectrum density are obtained and the results in good agreement with experiment and calculations are given..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 562 (1987)
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Effects of fiber external cavity on properties of semiconductor injection lasers
Shi fijing, Li Dongshu, and Zhou Wenjin
A segment of fiber was coupled to a GaAlAs DH laser as external cavity, and L-I characteristics and spectra of the laser with and without fiber coupled were measured.Mode selection in the laser with coupled fiber were observed.
A segment of fiber was coupled to a GaAlAs DH laser as external cavity, and L-I characteristics and spectra of the laser with and without fiber coupled were measured.Mode selection in the laser with coupled fiber were observed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 565 (1987)
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Thermal stability of nonresonant ring laser cavity
Lu Baida, and Huang Yuan
The thermal stability of a nonresonant ring laser cavity is analyzed by mans of equivalent laser resonantors. In the general case i. e., principal-point distances hi(i=1, 2) varies with the focal length of the internal thermal lens, the analytical expressions are derived and compared with those obtained by using approx
The thermal stability of a nonresonant ring laser cavity is analyzed by mans of equivalent laser resonantors. In the general case i. e., principal-point distances hi(i=1, 2) varies with the focal length of the internal thermal lens, the analytical expressions are derived and compared with those obtained by using approximate method..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 568 (1987)
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Study on laser alloying of 60
#
steel surfacel
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Experimental procedures are presented for laser alloying of 60# steel surface using a transversely excited flow CW CO2 laser with an output power of about 2 kW. Microstructural and electron spectrum analyses of the treated surface indicate that laser alloying offers the possibility in situ alloy synthesis on workpiece
Experimental procedures are presented for laser alloying of 60# steel surface using a transversely excited flow CW CO2 laser with an output power of about 2 kW. Microstructural and electron spectrum analyses of the treated surface indicate that laser alloying offers the possibility in situ alloy synthesis on workpiece surface..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 571 (1987)
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[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 575 (1987)
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[in Chinese]
[in Chinese], and [in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 14, Issue 9, 576 (1987)
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Laser Devices and Laser Physics