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Chinese Journal of Lasers
Contents
1983
Volume: 10 Issue 2
23 Article(s)
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 1 (1983)
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Laser Devices and Laser Physics
Polarization characteristics of stripe geometry GaAs—Ga
1-x
Al
x
As DH lasers with masked and selective thermal oxidation structure
Liu Hongdu, and Feng Zhechuan
We have studied the polarization characteristics of stripe geometry GaAs-Ga1-x AlxAs DH lasers with masked and selective thermal oxidation structure and found that the laser beams consist of both TE and TM modes with nearly the same intensities and are out of phase. The phenomena are quite different from the convention
We have studied the polarization characteristics of stripe geometry GaAs-Ga1-x AlxAs DH lasers with masked and selective thermal oxidation structure and found that the laser beams consist of both TE and TM modes with nearly the same intensities and are out of phase. The phenomena are quite different from the conventional semiconductor lasers in which the TE mode will be expected. A qualitative explanation for the above anomalous polarization charac-teristics is presented in view of the stresses and photoelastic effects in the active region..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 65 (1983)
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Relationship between transient and stationary stability in semiconductor stripe-geometry DH lasers
Chen Weixi, Niu Jinzhen, and Guo Changzhi
The variation of beam waist position, beam width and light power with injection current in GaAs-AlXGa1-XAs DH stripe-geometry lasers, and the relationship between the station-ary stability and transient self-sustained pulsation have been studied experimentally. When the injection current varies, the position of the ver
The variation of beam waist position, beam width and light power with injection current in GaAs-AlXGa1-XAs DH stripe-geometry lasers, and the relationship between the station-ary stability and transient self-sustained pulsation have been studied experimentally. When the injection current varies, the position of the vertical beam waist for all types of lasers is always at the laser facet, the vertical beam width remains unchanged. No matter whether or not there are changes in the horizontal beam waist position, the transient self-sustained pulsation usually appears when the horizontal width of the beam waist varies considerably, and the current range for which self-sustained pulsation occurs usually lies between A, B kinks in the light power characteristics..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 70 (1983)
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A Nd-doped phosphate glass laser disk amplifier of 200mm clear aperture
Zheng Yuxia, Fan Dianyuan, Yu Wenyan, and Zhuo Dunshui
This paper reports a high-power disk amplifier made of Nd doped phosphate glass. The gain coefficient is up to 4.8%cm-1 and the gain uniformity is better than 13%.
This paper reports a high-power disk amplifier made of Nd doped phosphate glass. The gain coefficient is up to 4.8%cm-1 and the gain uniformity is better than 13%..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 74 (1983)
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Enhanced-impulse effect of TEA CO
2
lasers
Xie Peiliang, Wang Fungyun, and Zhang Xigang
The enhanced-impulse effect of TEA CO2 lasers is described. For CO2-N2-He mixtures at pressure from 400 torr to 2 atm, the output energy can be increased by 20~30% with the existence of enhanced-impulses.
The enhanced-impulse effect of TEA CO2 lasers is described. For CO2-N2-He mixtures at pressure from 400 torr to 2 atm, the output energy can be increased by 20~30% with the existence of enhanced-impulses..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 77 (1983)
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Study on two-photon dissociation of HgI
2
Shangguan Cheng, Yuan Cailai, Ye Chao, and Dou Airong
The experimental study on two-photon dissociation of HgI2 with a KrCl excimer laser at 222 nm is reported. Laser output at 5461 A(73S1-63P2)and 4358 A(73S1-63P1)from atomic Hg is obtained. The process of two-photon dissociation and the formation mechanism of the excited state Hg(73S1)are discussed.
The experimental study on two-photon dissociation of HgI2 with a KrCl excimer laser at 222 nm is reported. Laser output at 5461 A(73S1-63P2)and 4358 A(73S1-63P1)from atomic Hg is obtained. The process of two-photon dissociation and the formation mechanism of the excited state Hg(73S1)are discussed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 81 (1983)
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Investigation on hyperfine structure of
127
I
2
by saturated absorption spectroscopy at 633 nm
Li Fu, Hu Xiken, Luo Gaolai, Zhang Peilin, Zhao Shuoyan, and Ou Zhenya
The full hyperfine components of R(127)line in 11-5 band and P(33)line in 6-3 band of B←X electronic transition of molecular iodine were observed by saturated absorp-tion spectroscopy. Its frequency tuning range broadened by Zeeman effect was more than 2500 MHz. The method of the third-derivative signal was used for th
The full hyperfine components of R(127)line in 11-5 band and P(33)line in 6-3 band of B←X electronic transition of molecular iodine were observed by saturated absorp-tion spectroscopy. Its frequency tuning range broadened by Zeeman effect was more than 2500 MHz. The method of the third-derivative signal was used for the detection of the components..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 85 (1983)
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Four-wave mixing effect in the existence of SBS field
Xu Jie, Cheng Yuming, and He Guozhe
In this paper, wavefront reversal of weak-signals below threshold using SBS mirror” is reported. This phenomenon is explained by fonrwave mixing theory.
In this paper, wavefront reversal of weak-signals below threshold using SBS mirror” is reported. This phenomenon is explained by fonrwave mixing theory..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 88 (1983)
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A new method for measuring radial intensity distribution and diameter of the Gaussian beam
Zhu Yanbin
The paper introduces a new method for measuring the radial intensity distribu-tion and the diameter of the Gaussian beam. The radial intensity distribution and the diameter of the Gaussian beam can be obtained by measuring only the intensities on three coordinate point in the same cross section of the Gaussian beam.
The paper introduces a new method for measuring the radial intensity distribu-tion and the diameter of the Gaussian beam. The radial intensity distribution and the diameter of the Gaussian beam can be obtained by measuring only the intensities on three coordinate point in the same cross section of the Gaussian beam..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 90 (1983)
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Ultrahigh speed photography of ultrashort optical pulses
Gao Fuyuan, Zhao Jiran, Chen Shuqin, Wang Wenyao, Jiang Minhua, and Qiu Peihua
We have proposed and developed an optical rotation dispersion collinear optical Kerr shutter. Using this new shutter and the spliting beam sampling technique in combination with a group of glass plates, ultrashort green pulses flying with the velocity of light have been photographed successfully.
We have proposed and developed an optical rotation dispersion collinear optical Kerr shutter. Using this new shutter and the spliting beam sampling technique in combination with a group of glass plates, ultrashort green pulses flying with the velocity of light have been photographed successfully..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 93 (1983)
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Resonant coupling between EO and AO effects of LN modulators
Dong Xiaoyi, and Sheng Qiuqing
In this paper the resonant coupling phenomenon between EO and AO effects of LN modulators in the FM mode-locking of lasers is reported and discussed.
In this paper the resonant coupling phenomenon between EO and AO effects of LN modulators in the FM mode-locking of lasers is reported and discussed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 97 (1983)
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Bending characteristics of point holograms
Xu Kunxian
Similar to some of the lens analysis and design techniques known as bending, the bending characteristics of point holoerams are examined.
Similar to some of the lens analysis and design techniques known as bending, the bending characteristics of point holoerams are examined..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 101 (1983)
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Vibration analysis of hydraulic engineering by holographic interferometry
He Bosen, and Chen Jishu
This paper introduces how to use holographic interferometry to study the vibration mode of the hydraulic engineering and the model design, some experimental techniques and formulae used in calculation are also described. In the last part, the vibration mode of a factory building of hydro-electric power station and the
This paper introduces how to use holographic interferometry to study the vibration mode of the hydraulic engineering and the model design, some experimental techniques and formulae used in calculation are also described. In the last part, the vibration mode of a factory building of hydro-electric power station and the two dimensional vibration mode of a gravity dam are obtained and the comparison of those results from the theoretical calculation or finite element method are given..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 105 (1983)
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Interferometry of laser induced birefringence in glasses
Li Chengfu, and Deng He
The experimental results of laser induced birefingence in several types of optical glasses and laser glasses under the action of intense laser beam are reported, the laser induced birefringence coeffcients of these glasses have been measured, and some possible mechanisms causing laser induced birefringence in these gla
The experimental results of laser induced birefingence in several types of optical glasses and laser glasses under the action of intense laser beam are reported, the laser induced birefringence coeffcients of these glasses have been measured, and some possible mechanisms causing laser induced birefringence in these glasses discussed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 110 (1983)
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Angle scattering of multilayer dielectric thin films
Fan Zhenxiu
The formulas for angle scattering of multilayer dielectric thin films are derived on the basis of Beckmann surface scattering. The angle scattering of 21 layers of TiO2/SiO2 reflective coatings at various wavelengths are calculated.
The formulas for angle scattering of multilayer dielectric thin films are derived on the basis of Beckmann surface scattering. The angle scattering of 21 layers of TiO2/SiO2 reflective coatings at various wavelengths are calculated..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 113 (1983)
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Photodiode line array for laser and optical display
Liang Peihui, Zhang Weiqing, and Ye Chao
We present here the principle and properties of a simple optical multichannel analyzer consisting of a photodiode array and describe its applications in laser and optical display.
We present here the principle and properties of a simple optical multichannel analyzer consisting of a photodiode array and describe its applications in laser and optical display..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 117 (1983)
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[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Multi-orders of SRS in hydrogen of tens of atm have been realized, for the first time in China. The frequency conversion is in the range from VUV to the infrared. Two orders of Stokes and six orders of anti-Stokes lines excited by 0.53μm laser light, as well as eight orders of anti-Stokes line excited by 1.06μm laser l
Multi-orders of SRS in hydrogen of tens of atm have been realized, for the first time in China. The frequency conversion is in the range from VUV to the infrared. Two orders of Stokes and six orders of anti-Stokes lines excited by 0.53μm laser light, as well as eight orders of anti-Stokes line excited by 1.06μm laser light were obtained in the same device. So the number of wavelengths ina YAG laser is more than fifteen. The overall efficiency of SRS from the pump light is about 30%. The intensity of the first order Stokes line is as high as several hundreds of kilowatts..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 120 (1983)
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[in Chinese]
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Experiments of Raman frequency conversion and compression have been conducted. Raman laser light at 6303 A is obtained from the main pulse at 1.06 μm with a compression ratio of about 2 in pulse duration.
Experiments of Raman frequency conversion and compression have been conducted. Raman laser light at 6303 A is obtained from the main pulse at 1.06 μm with a compression ratio of about 2 in pulse duration..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 120 (1983)
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[in Chinese]
[in Chinese], and [in Chinese]
A simple laser pulse detector using plasma has been investigated experimentally. The obtained output electric pulse was about 7V and the risetime 3 ns with a vacuum of 8×10-2 torr, bias of 20V and an electrode gap of 0.1 mm whenthe peak power of the input laser pulse was 1MW.
A simple laser pulse detector using plasma has been investigated experimentally. The obtained output electric pulse was about 7V and the risetime 3 ns with a vacuum of 8×10-2 torr, bias of 20V and an electrode gap of 0.1 mm whenthe peak power of the input laser pulse was 1MW..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 123 (1983)
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[in Chinese]
[in Chinese]
The fact that local anesthesia can not restraint the sense of pain caused by the irradiation of YAG laser light has been discovered in some cases. This phenomenon accounts for the effect of YAG laser in deep organic tissues and the reduced(or lost)efficacy of local anesthesietic results from the irradiation of YAG lase
The fact that local anesthesia can not restraint the sense of pain caused by the irradiation of YAG laser light has been discovered in some cases. This phenomenon accounts for the effect of YAG laser in deep organic tissues and the reduced(or lost)efficacy of local anesthesietic results from the irradiation of YAG laser light. In addition, the local anesthesia would also cause the extension of scattering angle(or necrotic area), change the properties and the transmittanne of the laser. All these lead to a conclusion: local anesthesia isn't suitable for YAG laser operation..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 124 (1983)
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[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
13 cases of skin cancer were successfully treated with refrigeration and CO2 laser. Duration of the diseases varied from 3 Months to 15 years. Results: All cases were clinically cured, some of them were followed up and no recurrence was found. It has the following advantages over other treatments: no anaesthesia, no pa
13 cases of skin cancer were successfully treated with refrigeration and CO2 laser. Duration of the diseases varied from 3 Months to 15 years. Results: All cases were clinically cured, some of them were followed up and no recurrence was found. It has the following advantages over other treatments: no anaesthesia, no pain, less bleeding, decreasing metastasis of malignant cells and shortening of the treatment course..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 126 (1983)
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[in Chinese]
[in Chinese], and [in Chinese]
The method and experience in the treatment of caruncle urethra with CO2 laser are reported. There is no bleeding during the operation and the recurrence is reduced after the operation. It provides a new methad for the treatment of caruncle urethra.
The method and experience in the treatment of caruncle urethra with CO2 laser are reported. There is no bleeding during the operation and the recurrence is reduced after the operation. It provides a new methad for the treatment of caruncle urethra..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 127 (1983)
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[in Chinese]
[in Chinese]
This paper describes the treatment of cervix erosion with a CO2 laser. Based upon the clinical observation of 160 cases of cervix erosion, the curative rate is up to 91.88% and the rate of improvement is 7.5% with only one case of failure.
This paper describes the treatment of cervix erosion with a CO2 laser. Based upon the clinical observation of 160 cases of cervix erosion, the curative rate is up to 91.88% and the rate of improvement is 7.5% with only one case of failure..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 10, Issue 2, 128 (1983)
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