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Chinese Journal of Lasers
Contents
1984
Volume: 11 Issue 6
19 Article(s)
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 1 (1984)
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Laser Devices and Laser Physics
Independently tunable two-wavelength narrow-band dye laser
Han Quansheng, and Zhang Zhiguo
We report a new kind of two-wavelength dye laser, which needs no additional intracavity element. The tuning of the two wavelengths is entirely independent and the frequency-difference is not limited by the gain spectral width of a single dye.
We report a new kind of two-wavelength dye laser, which needs no additional intracavity element. The tuning of the two wavelengths is entirely independent and the frequency-difference is not limited by the gain spectral width of a single dye..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 321 (1984)
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Double-wavelength pulsed tunable dye laser
Zhang Zhaixuan, Wang Jingyun, Yuan Yiqian, and Fei Haosheng
Simultaneous tunable two-wavelength operation of the tunable dye laser pumped by SHG of a Nd:YAG pulsed repetitive Q-switched laser is described. R6G, R6G+R640 and R6G+LD473 mixture in methanol solution were studied. The proper choice of the beam splitter and the Brewster prism pre-expander grazing-incident grating cav
Simultaneous tunable two-wavelength operation of the tunable dye laser pumped by SHG of a Nd:YAG pulsed repetitive Q-switched laser is described. R6G, R6G+R640 and R6G+LD473 mixture in methanol solution were studied. The proper choice of the beam splitter and the Brewster prism pre-expander grazing-incident grating cavity provided a wide tunable spectral range, low background ASE; polarized peak output power of the laser is about 40 kW and a spectral bandwidth is 0.22cm-1..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 323 (1984)
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Gain characteristics of a 10-atm X-ray preionized discharge XeCl laser
Lou Qihong, and He Qisheng
By using the technique of oscillation-amplification the small signal gain characteristics of an X-ray preionized discharge XeCl laser at a gas pressure of up to 10 atm have been investigated. The experimental result shows that for a Xe:HCl=10:l mixture with different amounts of neon dilution; the total gas pressure Pma
By using the technique of oscillation-amplification the small signal gain characteristics of an X-ray preionized discharge XeCl laser at a gas pressure of up to 10 atm have been investigated. The experimental result shows that for a Xe:HCl=10:l mixture with different amounts of neon dilution; the total gas pressure Pmax corresponding to the peak small signal gain appears to increase monotonically with the increasing amount of neon dilution, but the absolute partial pressure of HC1 corresponding to Pmax at various mole ratio, however, seems to remain relatively constant..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 327 (1984)
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Parametric four-wave mixing process in first order Stokes scattering of SRS in H
2
Li Gang, Guo Tili, Ding Haishu, and Jin Fennian
The investigation of the four-wave mixing process in first Stokes scattering of SRS in H2 is presented in this paper. In certain conditions, the parametric four wave mixing process in first order Stokes can occur and it plays an important role in energy transfer. The dependence of the physical process in first order St
The investigation of the four-wave mixing process in first Stokes scattering of SRS in H2 is presented in this paper. In certain conditions, the parametric four wave mixing process in first order Stokes can occur and it plays an important role in energy transfer. The dependence of the physical process in first order Stokes on pumping intensity and hydrogen pressure is studied experimentally..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 330 (1984)
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Multi-frequency oscillation in optical parametric oscillators
Wu Lusheng, and Lu Shiping
In a double resonant oscillator, oscillation of more than one cluster recorded simultaneously on the signal and idler waves is reported for the first time. Jumping change of the output frequency has been observed and the "cluster effect" is confirmed experimentally.
In a double resonant oscillator, oscillation of more than one cluster recorded simultaneously on the signal and idler waves is reported for the first time. Jumping change of the output frequency has been observed and the "cluster effect" is confirmed experimentally..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 334 (1984)
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Influence of heterojunction interface energy gap grade width on characterictic temperature T
0
of DH lasers
Wu Kelin
In this paper we propose a new concept of heterojunction effective energy gap barrier, and suppose that the relation between heterojunction effective energy gap barrier and heterojunction nominal energy gap barrier is given byIt can explain some experimental results and contradiction in articles.
In this paper we propose a new concept of heterojunction effective energy gap barrier, and suppose that the relation between heterojunction effective energy gap barrier and heterojunction nominal energy gap barrier is given byIt can explain some experimental results and contradiction in articles..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 340 (1984)
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Investigation on spectral characteristics of branch selected CO laser at room temperatures with F-P etalon
Wang Yumin, Gui Zenxin, Zhang Shunyi, and Ding Zean
An experimental set-up using F-P etalon for measuring the output spectrum of the branch selected CO laser at room temperature is given. The influences of the discharge current, pressure and grating tuning angle on the output spectrum are studied.
An experimental set-up using F-P etalon for measuring the output spectrum of the branch selected CO laser at room temperature is given. The influences of the discharge current, pressure and grating tuning angle on the output spectrum are studied..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 343 (1984)
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Investigation on growth and laser properties of GGG: (Nd, Cr) single crystals
Zhang Lehui, Lin Chengtian, Liu Hairun, Liu Lin, Zhu Huanan, and Lin Xi
Investigation on the growth and laser properties of gadolinium gallium garnet crystal doped with Nd and Cr is reported. As the segregation coefficient of Nd in GGG is less than 1 and that of Cr is greater than 1, a modified Czochralski method for growth is adopted in order to keep the dopants being uniform in the grown
Investigation on the growth and laser properties of gadolinium gallium garnet crystal doped with Nd and Cr is reported. As the segregation coefficient of Nd in GGG is less than 1 and that of Cr is greater than 1, a modified Czochralski method for growth is adopted in order to keep the dopants being uniform in the grown crystal..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 347 (1984)
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Ti-diffused LiNbO
3
waveguide interferometric modulator
Huang Zhangyong, fang Dewei, and Zheng Neng
An interferometric modulator with Ti-diffused LiNb03 waveguide has been fabricated. Modulation experiments were made at the optical wavelength of 0.6328μm using square wave signal of 1kHz, pulse signal of 50kHz and sine wave signal of 100 kHz-30 MHz.Kxperimental results are as follows: maximum modulation degree-87%, π
An interferometric modulator with Ti-diffused LiNb03 waveguide has been fabricated. Modulation experiments were made at the optical wavelength of 0.6328μm using square wave signal of 1kHz, pulse signal of 50kHz and sine wave signal of 100 kHz-30 MHz.Kxperimental results are as follows: maximum modulation degree-87%, π phase voltage-Vπ = 45 V (peak to peak), eapacitaneo-8 pf and 3 db bandwidth at 800 MHz..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 352 (1984)
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Investigation on physical mechanism of shock waves in materials generated by Q-switched laser beam
Zhou Yewei, Zheng Chuanxiang, Yang Shouzhi, and Xie Jian
Using a Q-switched ruby laser pulse to cause a transient heating of silver film on the surface of a piezoelectric ceramic sheet, the investigation on the physical mechanism of laser generated shock wave in absorbing materials has been performed. It is shown from the analysis of the obtained electrical signals that ther
Using a Q-switched ruby laser pulse to cause a transient heating of silver film on the surface of a piezoelectric ceramic sheet, the investigation on the physical mechanism of laser generated shock wave in absorbing materials has been performed. It is shown from the analysis of the obtained electrical signals that there are two types of physical mechanisms for laser generated shock waves: one is the thermal shock, which is due to the thermal expansion and the giant stress gradient following the rapid absorption of laser pulse energy at the surface layer of an elastic specimen; the other is the mechanical shock, which is due to the rapidly vaporizing and expanding of the high temperature vapor which exerts a pressure on the target surface..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 355 (1984)
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[in Chinese]
Fu Rulian, Kai Guiyun, Yang Mengyan, and Geng Xikun
By 150 W CW CO2 laser beam irradiation, the elimination of the oxidation stacking faults in silicon has been observed and its mechanism is discussed.
By 150 W CW CO2 laser beam irradiation, the elimination of the oxidation stacking faults in silicon has been observed and its mechanism is discussed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 359 (1984)
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Measurement of total integrated scattering of laser films
Chen Yisheng, and Wang Wengui
This paper presents a method of measuring the total integrated scattering (TIS) of laser films and the formula for measurement. Some experimental results obtained by using weak signal sychronous loek-in technique are given. The sensitivity of this equipment is over 10-5.
This paper presents a method of measuring the total integrated scattering (TIS) of laser films and the formula for measurement. Some experimental results obtained by using weak signal sychronous loek-in technique are given. The sensitivity of this equipment is over 10-5..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 362 (1984)
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New method for laser measurement of straightness of large sized objects
Li Yu, Li Shaoji, and Zhu Hang
This paper relates a new method for laser measurement of straightness of large sized objects. The advantages of the method are that its accuracy is not dependent on the straightness of the laser beam and stability of the laser itself. Moreover, straightness of tens of microms can be measured and an accuracy of a fracti
This paper relates a new method for laser measurement of straightness of large sized objects. The advantages of the method are that its accuracy is not dependent on the straightness of the laser beam and stability of the laser itself. Moreover, straightness of tens of microms can be measured and an accuracy of a fraction of a micron is readily given by coarse grating..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 365 (1984)
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On "Design and calculation of power supply circuit for a L-C constant-current charges"——A discussion with comrade Sun Naigen
Han Zhimin
According to the principle of L-C converter,applicable formulas have been derived based on the quality factor Q of the circuit.
According to the principle of L-C converter,applicable formulas have been derived based on the quality factor Q of the circuit..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 369 (1984)
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Indications and contraindications of laser therapy
Liu Puhe, and Xu Guoxiang
This paper describes briefly the indications and contraindications of laser therapy in ophthalmology, dermatology, oncology, surgeiy, gynecology, internal medicine, neurology, stomatology and otorhinolarygology with 78 kinds of diseases and 54,176 cases listed in total.
This paper describes briefly the indications and contraindications of laser therapy in ophthalmology, dermatology, oncology, surgeiy, gynecology, internal medicine, neurology, stomatology and otorhinolarygology with 78 kinds of diseases and 54,176 cases listed in total..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 373 (1984)
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[in Chinese]
[in Chinese]
Single-mode integrated optical stripe waveguides were fabricated on glass substrates by Na+ K+ ion exchange. A new coupling method is presented.
Single-mode integrated optical stripe waveguides were fabricated on glass substrates by Na+ K+ ion exchange. A new coupling method is presented..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 381 (1984)
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[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
CO2 laser opto-acoustic absorption spectra for methanol and ethanol vapors are studied at room-temperature and saturated vapor pressure. The spectral range is from 9μm to 11μm, including two bands and four branches of about 60 lines of CO2 molecular spectrum.
CO2 laser opto-acoustic absorption spectra for methanol and ethanol vapors are studied at room-temperature and saturated vapor pressure. The spectral range is from 9μm to 11μm, including two bands and four branches of about 60 lines of CO2 molecular spectrum..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 382 (1984)
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[in Chinese]
[in Chinese]
.
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 6, 384 (1984)
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Laser Devices and Laser Physics