Journals >Chinese Journal of Lasers
Contents
1988
Volume: 15 Issue 4
20 Article(s)
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Research Article
Measurement of stimulated emission cross section of CO2 laser from 00°1-10°0 transition
Ma Yangwu, and Han Yonghuan
On the basis of measured expression from the rate equation, the stimulated-emission cross sections of seven lines of CO2 laser from 00?-10? transition at different conditions were measured by means of a pulse-amplification-gain technique, and 83 values of were obtained. Theoretical values of were calculated according tOn the basis of measured expression from the rate equation, the stimulated-emission cross sections of seven lines of CO2 laser from 00?-10? transition at different conditions were measured by means of a pulse-amplification-gain technique, and 83 values of were obtained. Theoretical values of were calculated according to an analytical expression from the definition of The measured values of were compared with theoretical ones, and they are in satisfactory agreement.Finally,an analysis was made of the dependence of on the rotational quantum number J,its temperature and the pressure of active gas mixture..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 221 (1988)
Elastic wave generated with pulsed laser light
Zhang Xiaorong, Gan Changming, and Zheng Leqi
The application of laser pulse in generating elastic wave is reported The experimental system is described which uses a ruby pulsed laser as light source and interdigital transducer as receiver. The observed results are discussed. It is shown that this method has great potential in non-contactive generation of elastic The application of laser pulse in generating elastic wave is reported The experimental system is described which uses a ruby pulsed laser as light source and interdigital transducer as receiver. The observed results are discussed. It is shown that this method has great potential in non-contactive generation of elastic waye.
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 227 (1988)
Laser pulse photoacoustic effect in liquid and detection by beam deflection method
Shi Baixuan, Yu Qingao, and Qi Yong
Laser pulsed photoaeoustic effect in liquid and detection technique by beam deflection method are demonstrated. The possibility of sound velocity measurement in liquid is examined. An experimental device is designed and the sound velocities in water at different temperatures are measured.Laser pulsed photoaeoustic effect in liquid and detection technique by beam deflection method are demonstrated. The possibility of sound velocity measurement in liquid is examined. An experimental device is designed and the sound velocities in water at different temperatures are measured..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 231 (1988)
Areal-time and rapid scanning autocorrelator for measuring duration of femtosecond laser pulses
Zhang Yinghua, Fu Baoxiang, Zhang Gruoxuan, and Liu Yupu
A rapid scanning autoeorrelator suitable for measuring the duration of femtosecond laser pulses in real-time is described. The autocorrelator consists of an audio loud-speaker, an oscilloscope and an electronic controller. It has the advantages of simple structure, easy alignment and low costA rapid scanning autoeorrelator suitable for measuring the duration of femtosecond laser pulses in real-time is described. The autocorrelator consists of an audio loud-speaker, an oscilloscope and an electronic controller. It has the advantages of simple structure, easy alignment and low cost.
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 243 (1988)
Holography and Information Processing
Rainbow holographic imaging with spatial filtering pseudocolor image plane
Liu Shou, and Zhang Xiangsu
This article describes a simple experimental optical avrangement with slit image plane rainbow holograms are recorded using a single lager beam, and the pseudo-color encoding can be made at the same time.This article describes a simple experimental optical avrangement with slit image plane rainbow holograms are recorded using a single lager beam, and the pseudo-color encoding can be made at the same time..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 214 (1988)
Paired correlation spekles and speckle-moires
He Duomin, and Liu Zhishen
Based on the concept of paired correlation speckle patterns, the mechanism of moize-specklegram is explained both theoretically and experimentally, and speckle-moira phenomenon are furthrer investigated.Based on the concept of paired correlation speckle patterns, the mechanism of moize-specklegram is explained both theoretically and experimentally, and speckle-moira phenomenon are furthrer investigated..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 216 (1988)
Laser Physics
Experimental investigation of cavity configurations for CVL pumped dye lasers
Tang Chuanshun, and Sun Wei
Four kinds pf cavity configurations of dye lasers transversely pumped by high PEF CuBr lasers are investigated and their operating characteristics compared. The doable prism expander with Littrow mounted grating cavity is found to be the optimum. Linewidth achieved is 0.0012 nm in 598~640 nm range and the conversion efFour kinds pf cavity configurations of dye lasers transversely pumped by high PEF CuBr lasers are investigated and their operating characteristics compared. The doable prism expander with Littrow mounted grating cavity is found to be the optimum. Linewidth achieved is 0.0012 nm in 598~640 nm range and the conversion efficiency is 7.5%. The amplified: spontaneous emission of 1.5% and single longitudinal mode operation areobtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 193 (1988)
Beam divergence of copper vapor laser versus efficiency of dye laser pumped with it
Liang Peihui, Sun Xiaoxiang, Zhang Shaofeng, Wo Minzheng, Ren Hong, and Wang Zhiying
Experimental results is presented which show that at the pumping level of 5W, when the beam divergence of copper vaper laser reduces from 8 mrad to 1 mrad, the outpnt power of the dye laser pumped with it will be doubled or more. Further improvement of divergence, however, can only result in slight increase of effcencyExperimental results is presented which show that at the pumping level of 5W, when the beam divergence of copper vaper laser reduces from 8 mrad to 1 mrad, the outpnt power of the dye laser pumped with it will be doubled or more. Further improvement of divergence, however, can only result in slight increase of effcency of the dye laser. This conclusion is in good agreement with the simple analysis of geometric optics. Thus, injection locked unstable resonator is the best arrangement for copper vapor laser as pumping source for dye lasers..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 197 (1988)
Saturable reactor used as charging inductor in copper vapor lasers
Huang Zhenguo, Shan Huanyan, Chen Ti, Huo yuan, Wang Hong, and Yu Zuehe
Design considerations of the saturable readtor used for copper vapor lasers are given. The experiments show that the use of saturable reactor improvess the switch. performances of thyratron and increases the pulse repetition frequency and input electric powerDesign considerations of the saturable readtor used for copper vapor lasers are given. The experiments show that the use of saturable reactor improvess the switch. performances of thyratron and increases the pulse repetition frequency and input electric power.
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 201 (1988)
Expanding of pulse duration of two channel synchronous XeCl excimer laser
Cao Hongru, Chen Tongrong, Che Mingyu, Li Zhaolin, Zhao Zhensheng, Yin Baolong, and Hu Xuejin
A notel two-channel discharge pumped excimer laser is reported. Two sets of LC pulse forming were line connected with the main dischange capaeitors respectively and oontroled by a common spark gap, discharged to their own channel. A pulse duration of 60 as from XeCl excimer laser was obtained, which was operated at finA notel two-channel discharge pumped excimer laser is reported. Two sets of LC pulse forming were line connected with the main dischange capaeitors respectively and oontroled by a common spark gap, discharged to their own channel. A pulse duration of 60 as from XeCl excimer laser was obtained, which was operated at fine sychronism(jitter time 4ns).The energy of each laser beam was 120mJ..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 204 (1988)
Effects of flow velocity on activation features of the medium in transverse flow CO2 lasers
Zhongxiang, Chu Zexiang, Chen Liyin, and Xu Jihua
Taking a transverse flow electrically excited CO2 laser as an example, the changing role of batput power and:activation feature with the flow velocity of the melium have been studied by means of physical mechanics, together "with the microdynamic inechanism concerning the change of energy transfer among energy levTaking a transverse flow electrically excited CO2 laser as an example, the changing role of batput power and:activation feature with the flow velocity of the melium have been studied by means of physical mechanics, together "with the microdynamic inechanism concerning the change of energy transfer among energy levels in nonequilibrium flow laser medium..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 207 (1988)
Study of role of bromine in CuBr lasers
Zhao Yuxing, Tang Xingli, and Liang Baogen
The role of bromine in GuBr lasers was investigated by computation and experimental measurement and the explanations of some phenomena and relationship are given.The role of bromine in GuBr lasers was investigated by computation and experimental measurement and the explanations of some phenomena and relationship are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 211 (1988)
Experimental investigation on temporal coherence of laser light transmitting through optical fiber
Dong Xiaoyi, Zhan Jianzhong, Shen Qiuqin, and Lu Kecheng
The temporal coherence and the changing rule of laser transmitting through an optical fiber are investigated experimentally, and an experimental Inethod to determin the temporal coherent function is put forward.The temporal coherence and the changing rule of laser transmitting through an optical fiber are investigated experimentally, and an experimental Inethod to determin the temporal coherent function is put forward..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 236 (1988)
Operating characteristics of He-KrII laser pumped by pulsed HCD
Qu Jianan, Qiu Junlin, Zhang yuening, and Gong Zhiwei
Using the pulsed HOD, we have obtained the He-KrII laser with average power of about 6 mW and the peek output of 10 W. The maximum gain is about 103%m-1, and the temporal and spatial distributions of the gain have been measured.Using the pulsed HOD, we have obtained the He-KrII laser with average power of about 6 mW and the peek output of 10 W. The maximum gain is about 103%m-1, and the temporal and spatial distributions of the gain have been measured..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 239 (1988)
A highly efficient oxazine-9 dye laser
Ma Yurong, Tan Shici, and Wang Yuesheng
In this paper the synthesis of laser dye oxazine-9 is described briefly. The laseroutput with band width between 640~675 nm pumped by 532 nm laser pulse is obtained. Laser conversion eificiency can reach to as high as 22%. The laser threshold energy is about 0.78mJ.In this paper the synthesis of laser dye oxazine-9 is described briefly. The laseroutput with band width between 640~675 nm pumped by 532 nm laser pulse is obtained. Laser conversion eificiency can reach to as high as 22%. The laser threshold energy is about 0.78mJ..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 241 (1988)
Critical slowing down and critical exponents in LD/PIN bistable optical semicondicror lasers
Zhong Lichen, and Guo Yili
Critical slowing down for LD/PIN bistable optical semiconductors and the critical slowing down exponents for this system have been investigated experimentally. The experimental value r-0.53, is basically in agreement with the theoretically predicted value of 0.5.Critical slowing down for LD/PIN bistable optical semiconductors and the critical slowing down exponents for this system have been investigated experimentally. The experimental value r-0.53, is basically in agreement with the theoretically predicted value of 0.5..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 245 (1988)
Variable method for mode calculations of multi-element cavity
Lu Yaxiong
The dependence of the round-trip matriee elements on the position of reference plane is given, The variable method for mode calculations of multi-element cavity has been demonstrated. Some cavity modes are calculated by this method as examples.The dependence of the round-trip matriee elements on the position of reference plane is given, The variable method for mode calculations of multi-element cavity has been demonstrated. Some cavity modes are calculated by this method as examples..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 248 (1988)
Energy levels and spectroscopic characteristics of BHA:C3+ Crystals
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A new crystal BO:3Al2O3:Gr3+, grown by Czoehralski method is reported. Absorption spectrum and fluorescence spectrum at room temperatures were measured. Three nm.sharp lines of fluorescence spectrum are at 695, 692.5,and 691 nm.4T2 emission is from 700 to 900nm. The crystal-field levels were calculated according to staA new crystal BO:3Al2O3:Gr3+, grown by Czoehralski method is reported. Absorption spectrum and fluorescence spectrum at room temperatures were measured. Three nm.sharp lines of fluorescence spectrum are at 695, 692.5,and 691 nm.4T2 emission is from 700 to 900nm. The crystal-field levels were calculated according to static electronic field model. The parameters such as crystal field, strength Dq, Eacach parameter B and C and E were calculated to be 1663, 643, 3180 and 589cm-1 respectively..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 250 (1988)
Optical bistability and instability experiment of HgCdTe at room temperatures
Liu Yudong, Sun Wanjun, Jin Enpei, and Li Chunfei
We report the experimental research of optical bistabilty and instability at room temperatures in 200 micron thick Kg1-xOdxTe FP etalons with x=0.234 and x=0.223 using 100 ns TEA CO2 laser pulses.We report the experimental research of optical bistabilty and instability at room temperatures in 200 micron thick Kg1-xOdxTe FP etalons with x=0.234 and x=0.223 using 100 ns TEA CO2 laser pulses..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 253 (1988)
Rapid Communications
[in Chinese]
[in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 15, Issue 4, 255 (1988)
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