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Journals >
Chinese Journal of Lasers
Contents
1984
Volume: 11 Issue 5
20 Article(s)
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Research Article
[in Chinese]
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 1 (1984)
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Laser Devices and Laser Physics
Quasi two-dimensional gain distribution of a transverse flow CW CO
2
laser
Chen Liyin, Chu Zexiang, and Chen Haitao
A quasi two-dimensional transverse electrical discharge model is developed with which contours with constant unsaturated gain G0 in X-Z plane are obtained. The effects of the initial conditions on the spatial distribution of T, p, u, E/n and G0 along the flow axis are numerically investigated. It shows that there is an
A quasi two-dimensional transverse electrical discharge model is developed with which contours with constant unsaturated gain G0 in X-Z plane are obtained. The effects of the initial conditions on the spatial distribution of T, p, u, E/n and G0 along the flow axis are numerically investigated. It shows that there is an optimum flow velocity corresponding to the best gain distribution for a given operating pressure. The calculated results are compared with the experimental ones..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 257 (1984)
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Design of permanent magnetic wiggler and the experiment of device with a few periods
Wang Mingchang, and Zhou Huifen
Wiggler is an important part of free-electron lasers (FEL). According to the calculation analysis and the over-all requirement of the FEL, the consideration in designing the wiggler is given, a simulation device with a few periods is developed and the effect of magnetic field intensity on magnetic gap, period, size, an
Wiggler is an important part of free-electron lasers (FEL). According to the calculation analysis and the over-all requirement of the FEL, the consideration in designing the wiggler is given, a simulation device with a few periods is developed and the effect of magnetic field intensity on magnetic gap, period, size, and material are measured, and the sinusoidal distribution of the magnetic fleldis investigatied. It is concluded that the design and the device can be used in FEL..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 263 (1984)
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Grazing-incidence grating cavities with Brewster-prism beam preexpander for pulsed dye lasers
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The characteristics of a variety of dye laser oscillators transversally pumped by SHG and THG of a Nd: YAG pulsed repetitive laser are reported and compared. The performances of the Brewster-prism preexpanded cavity are better than those of the simple grazing-incidence grating cavity.
The characteristics of a variety of dye laser oscillators transversally pumped by SHG and THG of a Nd: YAG pulsed repetitive laser are reported and compared. The performances of the Brewster-prism preexpanded cavity are better than those of the simple grazing-incidence grating cavity..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 267 (1984)
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bombardment isolated stripe geometry (GaAl) As/GaAs DH lasers
Zhuang Wanru, Ma Yingdi, and Hu Yiguan
The resistivity achieved is up to(1-2)×108 Ω.cm for D2+ bombarded GaAs single crystal chips from the room temperature to 600℃ so long as the annealing temperature is kept below 200 ℃. The near field pattern, spectral, frequency response and degradation characteristics for the isolated stripe geometry lasers made o
The resistivity achieved is up to(1-2)×108 Ω.cm for D2+ bombarded GaAs single crystal chips from the room temperature to 600℃ so long as the annealing temperature is kept below 200 ℃. The near field pattern, spectral, frequency response and degradation characteristics for the isolated stripe geometry lasers made of D2+ bombarded (QaAl) As/GaAs DH chips are almost the same as those of H+ bombarded lasers..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 270 (1984)
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A heliumless long lifetime repetitive tunable TEA CO
2
laser
[in Chinese]
The output characteristics of the heliumless long lifetime repetitive TEA CO2 laser are given. One gas fill lifetime exceeds 106 shots and the overall efficiency is about 14%. The experiment indicates that the output characteristics of TEA CO2 laser are not affected by helium.
The output characteristics of the heliumless long lifetime repetitive TEA CO2 laser are given. One gas fill lifetime exceeds 106 shots and the overall efficiency is about 14%. The experiment indicates that the output characteristics of TEA CO2 laser are not affected by helium..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 273 (1984)
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Thermal effects of repetitive discharge gas in static excimer lasers
Zheng Chengen
The heat-expanding model of discharge gas in repetitive static excimer lasers is described. The calculated results show that its effects on the average laser output power and beam quality are noticeable.
The heat-expanding model of discharge gas in repetitive static excimer lasers is described. The calculated results show that its effects on the average laser output power and beam quality are noticeable..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 276 (1984)
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Small signal gain measurement of CW HF chemical lasers
Huang Euiping, Sun Yizhu, Sang Fengting, Yuan Qinian, and Zhuang Qi
An apparatus for measuring the spatially resolved small-signal gain of CW HF chemical lasers is described. The gain distribution of several transitions for nozzle CL-9 are obtained. A brief discussion on the experimental results and the relevant errors is given.
An apparatus for measuring the spatially resolved small-signal gain of CW HF chemical lasers is described. The gain distribution of several transitions for nozzle CL-9 are obtained. A brief discussion on the experimental results and the relevant errors is given..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 281 (1984)
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High frequency modulation characteristics of GaAs-GaAlAs DH LEDs for optical fiber communication
Zhan Suzen
The high frequency modulation characteristics of GaAs-GaAlAs DH LBDs are analyzed and the results (data and curves) presented. Also discussed are the linear range and modulation bandwidth for P-I, V-I curves as the devices are modulated by various signals, and the optimum operation point of the device can thus be deter
The high frequency modulation characteristics of GaAs-GaAlAs DH LBDs are analyzed and the results (data and curves) presented. Also discussed are the linear range and modulation bandwidth for P-I, V-I curves as the devices are modulated by various signals, and the optimum operation point of the device can thus be determined..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 283 (1984)
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Bistable optical device using a TE-TM modes interference waveguide modulator
Zou Lixun, Zhang Lei, Wan Lide, and Li Chunfei
We demonstrated a new hybrid bistable optical device by a laser beam to excite simultaneously both TE mode and TM mode in a Ti-diffused LiNbO3 waveguide modulator and making them interfere with each other outside the waveguide. The interfered light is fed back to control the waveguide modulator. An approximate theory i
We demonstrated a new hybrid bistable optical device by a laser beam to excite simultaneously both TE mode and TM mode in a Ti-diffused LiNbO3 waveguide modulator and making them interfere with each other outside the waveguide. The interfered light is fed back to control the waveguide modulator. An approximate theory is described..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 290 (1984)
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Multi-facet holographic lens with parallel axes
Zhang Jucheng
The multi-exposure holography with plate position shifting and the multi-facet holographic lens with parallel axes are presented. Some special transformations by means of these lenses are demonstrated as well as some possible applications of these lenses.
The multi-exposure holography with plate position shifting and the multi-facet holographic lens with parallel axes are presented. Some special transformations by means of these lenses are demonstrated as well as some possible applications of these lenses..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 294 (1984)
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Research on CO
2
laser melting of high silica glass systems
Jiang Zhonghong, Zhao Xiangshu, Su Baorong, Hu Xingyuan, Song Xiuyu, and Qian Zheng
A technique for preparing glasses in high silica systems using a CO2 laser is presented. With this technique, the glasses in the system of ZrO2-Al2O3-SiO2 and TiO2-Al2O3-SiO2 have been investigated and some glasses containing Si3N4, A1N, SiC have been obtained. The structure of Al2O3-SiO2 glass is also discussed.
A technique for preparing glasses in high silica systems using a CO2 laser is presented. With this technique, the glasses in the system of ZrO2-Al2O3-SiO2 and TiO2-Al2O3-SiO2 have been investigated and some glasses containing Si3N4, A1N, SiC have been obtained. The structure of Al2O3-SiO2 glass is also discussed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 298 (1984)
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Measuring high-resolution spectra of neon by means of optogalvanic spectroscopy
Jin Juguang, Wang Songyue, Jin Changtai, and Sheng Mingtao
Fine structure of the atomic neon transitions of 2Pt-4S1 and 2P3-4S1 were mesured by means of optogalvanic spectroscopy and the neon line at 5919.037 A. was identified to the transition of 2p7-4d3 for the first time. The obtained profile of spectral line has a typical and symmetrical shape of line. The line width (FWHM
Fine structure of the atomic neon transitions of 2Pt-4S1 and 2P3-4S1 were mesured by means of optogalvanic spectroscopy and the neon line at 5919.037 A. was identified to the transition of 2p7-4d3 for the first time. The obtained profile of spectral line has a typical and symmetrical shape of line. The line width (FWHM) was measured to be 3. 2 GHz..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 302 (1984)
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Mode and temporal characteristics of backward stimulated Brillouin scattering
Xu Jie, Cheng Tuming, and He Guozhen
The mode characteristics and the pulse compression phenomenon of backward stimulated Brillouin scattering (SBS) in CS2 light waveguide of different sizes are investigated.
The mode characteristics and the pulse compression phenomenon of backward stimulated Brillouin scattering (SBS) in CS2 light waveguide of different sizes are investigated..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 305 (1984)
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Multichannel degenerate four-wave mixing
Wu Cunkai, Zhou Feng, and Wang Zhiying
Using laser pulses from SHG of a Q-switched Nd:YAG laser system and dish-loroethane solution of coumarin 152 as nonlinear medium, four-channel degenerate four-wave mixing was achieved. The nonlinear reflection coefficient of about 4% was obtained for every channel.
Using laser pulses from SHG of a Q-switched Nd:YAG laser system and dish-loroethane solution of coumarin 152 as nonlinear medium, four-channel degenerate four-wave mixing was achieved. The nonlinear reflection coefficient of about 4% was obtained for every channel..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 308 (1984)
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Composite optical multichannel analyzer for laser parameter measurement
Liang Peihui, and Ye Chao
We report a composite optical multichannel analyzer system which has been used to measure the laser parameters, such as spectrum, far-field pattern, divergency in real time mode, and to measure directly the absorption coefficient of dyes.
We report a composite optical multichannel analyzer system which has been used to measure the laser parameters, such as spectrum, far-field pattern, divergency in real time mode, and to measure directly the absorption coefficient of dyes..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 310 (1984)
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Determination and catalytic purification of working gases for JL6A CO
2
laser
Wang Dao, Su Wen, Wang Suya, Li Wan, Li Xiaoyu, and Sun Xueying
The amount of CO and NO, formed during the electric discharge of the JL6A type CW high power transverse flow CO2 laser have been determined. The catalysts Pd-Ni/r-Al2O3 and the rare earth perovskite-type compounds (ABO3) are used for the elimination of both CO and NOa. For the ABO3 catalysts, conversion rate of CO is 8
The amount of CO and NO, formed during the electric discharge of the JL6A type CW high power transverse flow CO2 laser have been determined. The catalysts Pd-Ni/r-Al2O3 and the rare earth perovskite-type compounds (ABO3) are used for the elimination of both CO and NOa. For the ABO3 catalysts, conversion rate of CO is 85.1% and NO, 63.1% when the gas space velocity is 15,000 h-1 and the temperature is 260℃..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 313 (1984)
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Modeling of gas breakdown in the capillary of gas lasers
Yang Zhengming
The modeling of gas breakdown in the capillary is described and the view on the discussion of breakdown process in low breakdown voltage He-Ne lasers is presented.
The modeling of gas breakdown in the capillary is described and the view on the discussion of breakdown process in low breakdown voltage He-Ne lasers is presented..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 317 (1984)
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[in Chinese]
[in Chinese]
The analys is of influenced region near the cutting edge when CO2 laser is used for cutting and some main experimental results are given.
The analys is of influenced region near the cutting edge when CO2 laser is used for cutting and some main experimental results are given..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 319 (1984)
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[in Chinese]
[in Chinese]
The excision of external hemorrhoids infiltrated by connective tissues by CO2 laser has many advantages, such as short operation time,slight pain, no bleeding, good curative effect, no need to admit into hospital and no sequelae. It is a better method and worth popularizing.
The excision of external hemorrhoids infiltrated by connective tissues by CO2 laser has many advantages, such as short operation time,slight pain, no bleeding, good curative effect, no need to admit into hospital and no sequelae. It is a better method and worth popularizing..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 11, Issue 5, 320 (1984)
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Laser Devices and Laser Physics