Journals >Chinese Journal of Lasers
Contents
1987
Volume: 14 Issue 5
17 Article(s)
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Laser Devices and Laser Physics
Field profiles and mode equations of optical waveguide with Fermi index profile
Fan Junqing
The research on modes of planar optical waveguides with Fermi index profile is developed. The exact expressions of field profiles and mode equations which suit the cases of arbitrary a and d conbination are derived.The research on modes of planar optical waveguides with Fermi index profile is developed. The exact expressions of field profiles and mode equations which suit the cases of arbitrary a and d conbination are derived..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 257 (1987)
Steady-state characteristic analysis lor bistable laser diodes
Zhong Lichen, and Guo Yili
In this paper We analyze the steady-state characteristics of bistable semiconductor laser diode (BILD). A simple model for optical output of BIDL is obtained using nonlinear rate quations for electron and photon densities. This model emphasizes the physical mechanisms and parameters responsible for the bistability, givIn this paper We analyze the steady-state characteristics of bistable semiconductor laser diode (BILD). A simple model for optical output of BIDL is obtained using nonlinear rate quations for electron and photon densities. This model emphasizes the physical mechanisms and parameters responsible for the bistability, gives the state equation and explains the main features of BILD. Bistability with a very large hysteresis in P0-P4 characteristics is an outstanding feature of BILD..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 262 (1987)
Gas flow effects in pulse avalanche discharge XeCl excimer lasers
Qi Jianping, Lou Qihong, Ding Zean, Huo Yunsheng, and Wang Runwen
The gas velocity of a high pressure transverse flow excimer laser was measured with laser interferometer. The effects of gas heating caused by gas discharge on the laser output power were analysed theoretically. Maximum output power of 18 W at 16 pps was obtained with uniform transverse flow technology.The gas velocity of a high pressure transverse flow excimer laser was measured with laser interferometer. The effects of gas heating caused by gas discharge on the laser output power were analysed theoretically. Maximum output power of 18 W at 16 pps was obtained with uniform transverse flow technology..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 267 (1987)
Measurement of subnanosecond laser pulse width by deconvolution
Jiang Hongli, Lin Meirong, and Chen Wenju
This paper presents an effective method in which a picosecond laser pulse is observed with an instruments of subnanosecond time response and the observed signal is deconvolved to obtain the pulse width.This paper presents an effective method in which a picosecond laser pulse is observed with an instruments of subnanosecond time response and the observed signal is deconvolved to obtain the pulse width..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 272 (1987)
Reflectivity character of the resonance active medium
Fan Junying
An anomalous character of reflectivity of resonance active medium is analysed theoretically based on the treatment of nonlinear optical susceptibility of two level atomic system. The calculation curves of the relationship between B and A A* and B and 5 (A is the amplitude of the electric field of the laser beam, while An anomalous character of reflectivity of resonance active medium is analysed theoretically based on the treatment of nonlinear optical susceptibility of two level atomic system. The calculation curves of the relationship between B and A A* and B and 5 (A is the amplitude of the electric field of the laser beam, while 5 is the dimensionless detuning of center line of the atomic system about the’center frequency e0)) are obtained for the laser active medium as Nd: YAG crystal. It is shown that there is still dependence of B on A A* even at very low intensity of AA4.*-10-4..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 275 (1987)
Infrared fluorescence from laser induced sensitized reaction of SF6-UF6-H2 system
Ha Zhiqiang, Hou Huiqi, and Qin Qigong
Infrared fluorescence from the sensitized reaction in SF6-UFS-H3 system induced by 10.6.m P(24) line of a pulsed CO2 laser is investigated. The time resolved IB fluorescence of vibrationally excited HF* is measured with an InSb photovoltic detector and is compared with that from the SF6-H2 system under the similar expeInfrared fluorescence from the sensitized reaction in SF6-UFS-H3 system induced by 10.6.m P(24) line of a pulsed CO2 laser is investigated. The time resolved IB fluorescence of vibrationally excited HF* is measured with an InSb photovoltic detector and is compared with that from the SF6-H2 system under the similar experimental conditions. Our results show a linear dependence of fluorescence intensity with laser fluence. The time resolved IE fluorescence of HF* is dependent on the partial pressure of UF6, the fluorescence intensity obey the single exponential decay at lower PUIV but non-single exponential decay is observed at higher POT,- The time dependence of the HF* fluorescence intensity is explained with the infrared photo-sensitized reaction mechanism of the 8F6-UFe-H3 system..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 279 (1987)
Laser excited fluorescence spectra of atomic uranium
Wang Songyue, Jin Changtai, Sheng Mingtao, and Wang Xiulan
Fluorescence, radiation from atomic uranium were detected conveniently at 753.393, 763.175 and 763.954 nm when a do operated hollow cathode lamp aa uranium vapor source was irradiated by a CW ion laser pumped rhodamine 6G dye Jaser light. The elimination of intense background mainly attributed to the emissionfromthe laFluorescence, radiation from atomic uranium were detected conveniently at 753.393, 763.175 and 763.954 nm when a do operated hollow cathode lamp aa uranium vapor source was irradiated by a CW ion laser pumped rhodamine 6G dye Jaser light. The elimination of intense background mainly attributed to the emissionfromthe lamp are discussed in detail..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 283 (1987)
Laser wavelength meter with F-P etalon
Wu Ruikun
We report here the results about operation characteristics and error for F-P etalon wevelength meter with a reference beam. We have done some wavelength measurement experiment in a F-P system, in which the diameter of the interference pattern was measured by an OMA system and a He-Ne laser beam as reference beam. The EWe report here the results about operation characteristics and error for F-P etalon wevelength meter with a reference beam. We have done some wavelength measurement experiment in a F-P system, in which the diameter of the interference pattern was measured by an OMA system and a He-Ne laser beam as reference beam. The EMS error for 32 different wavelength measurements was about 0.0019nm..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 287 (1987)
Investigation of dependence of photoacoustic signal on optical beam position at samples
Wang Guifen, Zhang Ghunping, Ma Genyuan, and Zhang Guangyin
We used a piezoelectric ceramics as photoacoustic detector and investigated the dependence of photoacoustic signal on optical beam position at samples which was yielded by the optical absorption of the crystal Si at 10.6 /wn. The experimental results demonstrate that the photoacoustio signal was maximum when the opticaWe used a piezoelectric ceramics as photoacoustic detector and investigated the dependence of photoacoustic signal on optical beam position at samples which was yielded by the optical absorption of the crystal Si at 10.6 /wn. The experimental results demonstrate that the photoacoustio signal was maximum when the optical beam was located at the centre of sample. When the optical beam scans along the diameter of the circular sample the photoacoustic signals decrease gradually as the distance between the position and the centre ’of sample increase. The measured results are in good agreement with those of the theoretical calculations..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 292 (1987)
Design and experiment of multiple frequency beam splitting thin films
Fan Ruiying, Lu Yuemei, and Fan Zhengxiu
Design of a multiple frequency thin film is reported which possesses high reflectance at primary frequency and high tranmittance at doubled and tripled frequencies. The experimental results are given.Design of a multiple frequency thin film is reported which possesses high reflectance at primary frequency and high tranmittance at doubled and tripled frequencies. The experimental results are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 295 (1987)
Bis-thiourea cadmium chloride (BTCC) —— A novel nonlinear optical crystal of organometallic complex
Xing Guangcai, Jiang Minhua, Shao Zongshu, and Xu Dong
According to the idea of "combining the inorganic distorted polyhedron with asymmetric conjugate organic molecules", preliminary exploratory results of nonlinear optical material of organometallic complex are reported for the first time. Comprehensive study was carried out on the growth and the linear and nonAccording to the idea of "combining the inorganic distorted polyhedron with asymmetric conjugate organic molecules", preliminary exploratory results of nonlinear optical material of organometallic complex are reported for the first time. Comprehensive study was carried out on the growth and the linear and nonlinear optical properties of the typical material--bis-thiourea cadmium chloride (BTCC). The results show that the organometallic complex is a category of promising nonlinear optical material..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 302 (1987)
Miniature xenon flashlamp pumping source for small lasers
Cha Guigen, Wang Shiming, Jiang Shijie, and Sheng Guajian
Miniature xenon flashlamps with a size of 3x (12 - 50) mm used as pumping source of small lasers have been developed.Miniature xenon flashlamps with a size of 3x (12 - 50) mm used as pumping source of small lasers have been developed..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 309 (1987)
Analysis of detection system of fiber current sensors
Tang Xueyu, Liao Tanbiao, Wu Gengsheng, and Pan Anpei
Two detection systems of fiber current sensors are described and compared in this paper. The analyses indicates that the double way detection system has higher level of SNB and stronger ability of suppressing distrubances than the single way detection system. It is not only used for measuring AC hut also DC and is consTwo detection systems of fiber current sensors are described and compared in this paper. The analyses indicates that the double way detection system has higher level of SNB and stronger ability of suppressing distrubances than the single way detection system. It is not only used for measuring AC hut also DC and is considered to be the better detection system of fiber current sensors. The ^single way detection system has advanteges of simple structure, convenient adjustment and no special requirement for photodetector and amplifier. It is also useful in other fiber sensors such as fiber voltage meter..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 312 (1987)
Deuterium enrichment from methane by TEA CO2 laser
[in Chinese], [in Chinese], and [in Chinese]
Irradiating the mixture of methane and bromine with 9.6m 5(22) line of TEA C02 laser, we excite CH2D3 selectively and increase the rate of the bromination reaction of CH3D2 so that deuterium is enriched. The reaction mixture consists of 30 Torr CH4, 30 Torr CH2D3 and 10 Torr Br3. The enrichment factor is 1.48.Irradiating the mixture of methane and bromine with 9.6m 5(22) line of TEA C02 laser, we excite CH2D3 selectively and increase the rate of the bromination reaction of CH3D2 so that deuterium is enriched. The reaction mixture consists of 30 Torr CH4, 30 Torr CH2D3 and 10 Torr Br3. The enrichment factor is 1.48..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 317 (1987)
Luminescence of color centers in YAG
[in Chinese], and [in Chinese]
Fundamental parameters of the luminescence of color centers in YAG are reported in this paper. A color center’s concentration about 1x1017 cm-3 has been obtained. The fluorescence quantum efficiency is close’.tounit, and the lifetime is 3.1+0.5 ns.Fundamental parameters of the luminescence of color centers in YAG are reported in this paper. A color center’s concentration about 1x1017 cm-3 has been obtained. The fluorescence quantum efficiency is close’.tounit, and the lifetime is 3.1+0.5 ns..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 318 (1987)
LPS-Ⅱ laser power stabilizer
[in Chinese], and [in Chinese]
LPS-II laser power stabilizer with LiNb03 electro-optic modulator and high performance servo-circuit is described. The power instability is less than 4-0.05%, with the insertion loss of less than 50%. If a sinusoidal wave or a square wave signal is inputed into the modulation terminal, a stable laser beam with the gameLPS-II laser power stabilizer with LiNb03 electro-optic modulator and high performance servo-circuit is described. The power instability is less than 4-0.05%, with the insertion loss of less than 50%. If a sinusoidal wave or a square wave signal is inputed into the modulation terminal, a stable laser beam with the game waveform as the electric signal will be obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 5, 319 (1987)
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