Journals >Chinese Journal of Lasers
Contents
1988
Volume: 15 Issue 9
19 Article(s)
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Research Article
Perfection and laser performances of Nd:YAG crystals grown by temperature gradient technique (TGT)
Deng Peizhen, Qiao Jingwen, Hu Bing, and Zhou Yongzong
The formation and development of detects in Nd:YAG crystals grown by TGT have been studied systematically with different methods. According to the defect formation mechanism, the high quality area within crystal boules can be enlarged notably after reasonable modification of the growth parameters. Single transverse modThe formation and development of detects in Nd:YAG crystals grown by TGT have been studied systematically with different methods. According to the defect formation mechanism, the high quality area within crystal boules can be enlarged notably after reasonable modification of the growth parameters. Single transverse mode and single longitudinal mode laser output have been obtained easily from high dopant （Nd2O3 1wt％） and high optical homogeneneous laser rods. However, the effect of interference fringe distortion due to the growth strie in the crystal on the beam quality from disk laser and the laser threshold remain to be improved..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 522 (1988)
Fluorescence characteristics of Be0.3Al2O3:Cr3+ crystals
Hu Zhiwei, Wu Guangzhao, Ma Xiaoshan, Pan Peicong, and Zhang Xiurong
Origin of sharp luminescence lines in BeO·3A12O3:Cr3+ crystal, several different luminescence centers were found, and the energy transfer models among different Cr ion centers were put forward.Origin of sharp luminescence lines in BeO·3A12O3:Cr3+ crystal, several different luminescence centers were found, and the energy transfer models among different Cr ion centers were put forward..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 528 (1988)
Interference filter analyses of an encoded phase-picture
Zhou Kun, Zhong Yongbi, and Ghen Zhenpei
Theoretical analyses and experimental verification of the pseudo-coloring principle of density were made by regarding an encoded phase-picture as an interference filter and some meaningful results wore obtained.Theoretical analyses and experimental verification of the pseudo-coloring principle of density were made by regarding an encoded phase-picture as an interference filter and some meaningful results wore obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 531 (1988)
Holographic phase conjugated mirrors
Zhang Jinfang, Wang Mincao, and Yu Meiwen
A novel holographic phase conjugated mirror is put forward. Conjugated light wave could be obtained directly when the phase conjugated mirror is illuminated by the corresponding original object light wave.A novel holographic phase conjugated mirror is put forward. Conjugated light wave could be obtained directly when the phase conjugated mirror is illuminated by the corresponding original object light wave..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 561 (1988)
Study on natural vibration property of single tier high frame by laser holographic interferometic experiments
Qi Lan, Zhang Congwen, He Bosen, and Gu Hongen
Single tier high frame is a typical frame of factory building. It is necessary to determine natural vibration property of the frame in earthquake-resistant design. We have studied natural vibration property of the frame by laser holographic interferometry. The results show that this method is useful in studying these pSingle tier high frame is a typical frame of factory building. It is necessary to determine natural vibration property of the frame in earthquake-resistant design. We have studied natural vibration property of the frame by laser holographic interferometry. The results show that this method is useful in studying these problems..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 562 (1988)
Laser Manufacturing
Study on laser C.N and C.B alloying of 20# steel surfaces
Zheng Kequan, and Zhang Siyu
Experimental procedure is presented in 20# steel surfaces of carbonitriding and carbo-boronization by employing a transeversely-excited CO2 laser. The results indicate the chemical composition and microstructure in the laser penetrated layers has undergone a radical change and its hardness and resistance to abrasion haExperimental procedure is presented in 20# steel surfaces of carbonitriding and carbo-boronization by employing a transeversely-excited CO2 laser. The results indicate the chemical composition and microstructure in the laser penetrated layers has undergone a radical change and its hardness and resistance to abrasion have been greatly improved..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 568 (1988)
Laser Physics
Physical optics analysis on virtual concentric resonator modes
Chen Zhongmin
A virtual concentric resonator has very good mode-selection ability. The eigen solutions of the field distribution of a virtual concentric resonator have been derived in the paper by using fundamental mathematic processing.A virtual concentric resonator has very good mode-selection ability. The eigen solutions of the field distribution of a virtual concentric resonator have been derived in the paper by using fundamental mathematic processing..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 513 (1988)
Time characteristics of light pulses from copper vapor lasers
Wu Zehua, Wang Yongjiang, Xia Tiejun, Sun Wie, and Ying Xixiong
The dependence of pumping time of light pulses of 510.6nm and 578.2nm copper vapor laser lines on neon pressure and discharge voltage has been measured. The pumping time of 578.2nm laser pulses with different neon pressures decreases as the discharge voltage increases, and that of 510.6nm laser line is more sensitive wThe dependence of pumping time of light pulses of 510.6nm and 578.2nm copper vapor laser lines on neon pressure and discharge voltage has been measured. The pumping time of 578.2nm laser pulses with different neon pressures decreases as the discharge voltage increases, and that of 510.6nm laser line is more sensitive with respect to neon pressure..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 519 (1988)
Non-Fourier thermoelastic response to laser impact on a target
Yuan Gang, and Zhou Guangquan
Starting from modified Fourier heat conduction law, the propagation law of thermal shock-wave produced by laser light on one dimensional semi-infinite medium is discussed. Analytical expressions are obtained on short time and long time approximations. The short time approximate solution represents non-Fourier behaviourStarting from modified Fourier heat conduction law, the propagation law of thermal shock-wave produced by laser light on one dimensional semi-infinite medium is discussed. Analytical expressions are obtained on short time and long time approximations. The short time approximate solution represents non-Fourier behaviour and the long time approximate solution degrades into thermal coupled wave solution in classial heat conduction law..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 537 (1988)
Weak-Gaussian aperture approximation and fundamental characteristics of phase conjugate resonators(PCRs)
Li Baida, Cai Bangwei, and Wang Shaomin
Physical meaning of weak-Gaussian aperture approximation and the fundamental characteristics of PCRs are discussed in detail. The conditions for compensating intracavity distortions of PCRs is derived by using the transfer matrix method. Properties of PCRs are essentially different from those of conventional resonatorsPhysical meaning of weak-Gaussian aperture approximation and the fundamental characteristics of PCRs are discussed in detail. The conditions for compensating intracavity distortions of PCRs is derived by using the transfer matrix method. Properties of PCRs are essentially different from those of conventional resonators..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 544 (1988)
Light-induced four-wave mixing and scattering rings in LiNbO3:Fe crystals
Zhang Guangyin, Wu Yuanqing, Liu Siming, and Wang dinxiong
This paper reports two new scattering rings that appear when an extraordinarily polarized laser beam is incident on a thin sheet of LiNdO3:Fe crystal and discusses the mechanism leading to the phenomenon.This paper reports two new scattering rings that appear when an extraordinarily polarized laser beam is incident on a thin sheet of LiNdO3:Fe crystal and discusses the mechanism leading to the phenomenon..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 549 (1988)
Experimental investigation on Compton free electron lasers
Fu Ensheng, Wang Zhijiang, Wang Bing, Chen Lei, Shi Peisheng, Zhou Huifen, He Duohui, Wang Fuhua, Pei Yuanji, Jia Qika, Liang Ruzhen, and Yan Yan
Experimental results on a Compton free electron laser are reported. Free electron radiation with an average power of 1.4W at 10μm was obtained when 22MeV relativistic electron beam was injected into the SmCo5 permanent undulator with 3cm period for a total of 98 periods by a linear accelerator.Experimental results on a Compton free electron laser are reported. Free electron radiation with an average power of 1.4W at 10μm was obtained when 22MeV relativistic electron beam was injected into the SmCo5 permanent undulator with 3cm period for a total of 98 periods by a linear accelerator..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 553 (1988)
Accurate measurement of threshold current for semiconductor lasers
Zhao Yiguang
Analysis in this paper shows that a harmonic measurement method can be used to determine accurately the threshold current of semiconductor lasers. The experimental method and results are given and compared with those of other methods.Analysis in this paper shows that a harmonic measurement method can be used to determine accurately the threshold current of semiconductor lasers. The experimental method and results are given and compared with those of other methods..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 555 (1988)
Study on CVL beams
Yin Xianhua, Tao Yongxiang, Liang Baogen, Cui Jianli, and Chen Lifei
It was found that the annular structure of the stimulated emission is mainly due to nonuniform decay of the lower active level or the ground state "thermal dumping" resulting from excessive heat in axial region of the discharge tube.It was found that the annular structure of the stimulated emission is mainly due to nonuniform decay of the lower active level or the ground state "thermal dumping" resulting from excessive heat in axial region of the discharge tube..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 558 (1988)
Relaxation oscillation and beam characteristics of higher order Raman emission
Cheng Xusan, Lou Qihong, Huo Yunsheng, and Wang Runwen
Raman shifted convesion from AS3（226 nm） to S5 （849 nm） have been observed in high pressure H2 pumped by high power XeCl eximer laser radiation （308 nm）. Its photonconversion efficiency into blue-green region （S3, 499nm） was obtained up to 39％. Relaxation oscillations of higher order Raman shifted emissions were obtainRaman shifted convesion from AS3（226 nm） to S5 （849 nm） have been observed in high pressure H2 pumped by high power XeCl eximer laser radiation （308 nm）. Its photonconversion efficiency into blue-green region （S3, 499nm） was obtained up to 39％. Relaxation oscillations of higher order Raman shifted emissions were obtained and analysed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 564 (1988)
Rapid Communications
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 571 (1988)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 572 (1988)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 9, 573 (1988)
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