Journals >Chinese Journal of Lasers
Contents
1984
Volume: 11 Issue 2
22 Article(s)
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Research Article
Laser Devices and Laser Physics
A unified expression for oscillation frequency of optical resonance cavities
Deng Ximing, and Chen Zezun
Using the hydrodynamic model we have derived a unified expression for oscillation frequency of an optical cavity. It is as follows:and it has been tested with several examples.Using the hydrodynamic model we have derived a unified expression for oscillation frequency of an optical cavity. It is as follows:and it has been tested with several examples..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 65 (1984)
Sine-sqaured potential for planar channeling particles and Kumakhov radiation for charged particles
Luo Shiyu, and Shao Mingzhu
The new planar-continuum potential, the sine-squared potential, is introduced to analyse the behaviour of particle motion in a planar channel, and particle motion equation is written by the well known pendulum; particle motion equation and oscillation period are solved exactly by Jacobi elliptic functions and the firstThe new planar-continuum potential, the sine-squared potential, is introduced to analyse the behaviour of particle motion in a planar channel, and particle motion equation is written by the well known pendulum; particle motion equation and oscillation period are solved exactly by Jacobi elliptic functions and the first kind of complete elliptic integrals; radiation intensity and spectral characteristics of Kumakhov radiation are further analyzed; The results show that it is possible to take Kumakhov radiation as a new y-ray laser..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 69 (1984)
Transient stimulated Raman scattering in glass fiber
Gan Fuxi, Jin Deyun, Huang Guosong, and Chen Shizheng
Using a mode-locked laser at the wavelength of 0.53 ℃m with a peak power of over 107 W, we observed Stokes waves of fifteen orders and anti-Stokes waves of eight orders in a glass fiber with the composition of Ge-P-Si and a length of 20 m. The Raman frequency shift is 430 cm-1 in wave number, the range of frequency speUsing a mode-locked laser at the wavelength of 0.53 ℃m with a peak power of over 107 W, we observed Stokes waves of fifteen orders and anti-Stokes waves of eight orders in a glass fiber with the composition of Ge-P-Si and a length of 20 m. The Raman frequency shift is 430 cm-1 in wave number, the range of frequency spectra of the scattering light covers from 0.45℃m to 1.00 ℃m. The conversion efficiency of the Stimulated Eaman scattering is higher than 50%..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 75 (1984)
Multiple imaging by phase grating
Wang Yutang, and Fan Xiaoquan
Multiple imaging by phase grating has the advantages of better image quality and higher efficiency campared with other methods. A method of scanning-exposure was suggested, triangular phase grating was made up by this method. Its principle and experimental results are presented in this paper.Multiple imaging by phase grating has the advantages of better image quality and higher efficiency campared with other methods. A method of scanning-exposure was suggested, triangular phase grating was made up by this method. Its principle and experimental results are presented in this paper..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 78 (1984)
Study on relationship between density of F2-centers in LiF crystals and their laser stability
Li Shenhua, Jiang Xiuming, Huang Muzheng, Fan Fuchang, and Chen Yijing
The F2-centers of LiF crystals have the lowest energy level. The optimum dosage-rate of γ-irradiation for obtaining high density F2-centers has been investigated experimentally. The F2-centers are bleached after 6,200 shots.The F2-centers of LiF crystals have the lowest energy level. The optimum dosage-rate of γ-irradiation for obtaining high density F2-centers has been investigated experimentally. The F2-centers are bleached after 6,200 shots..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 89 (1984)
A nitrogen laser pumped double wavelength dye laser
Wang Xiaojing, Jing Tianfen, and Wang Jingyun
This paper presents an experimental device for simultaneously tunable operation at two wavelengths, using a single rhodamine 6G cell pumped by a nitrogen laser. The experimental setup and output features are given.This paper presents an experimental device for simultaneously tunable operation at two wavelengths, using a single rhodamine 6G cell pumped by a nitrogen laser. The experimental setup and output features are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 93 (1984)
Experimental study on resonance-coupled two-wave stimulated Raman scattering
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A new form of two-wave SRS is discovered using two nanosecond-pulsed laser beams of different frequencies to irradiate calcite and benzene when the frequency-difference of the incident beams is in resonance with the Baman transition frequency of the sample. The conditions for this phenomenon and characteristics are invA new form of two-wave SRS is discovered using two nanosecond-pulsed laser beams of different frequencies to irradiate calcite and benzene when the frequency-difference of the incident beams is in resonance with the Baman transition frequency of the sample. The conditions for this phenomenon and characteristics are investigated experimentally. An essential explanation is the resonance-coupled two-beam self-focusing..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 96 (1984)
Holographic interference measurement of refractive index distribution in diffusion transparencies
Li Xishan, Xia Qingsheng, and Jiang Anmin
A double exposure holographic interference method for distribution measurement of refractive index in optical glasses is reported. The measurement accuracy is ±1×10-6.A double exposure holographic interference method for distribution measurement of refractive index in optical glasses is reported. The measurement accuracy is ±1×10-6..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 100 (1984)
Low-frequency beat noise for gas lasers
Ba Enxu, Lu Kecheng, and Zhang Chunping
The beat frequency between modes of optical resonator with concave mirrors have been studied by the photomixing technique. In the experiment He-Ne laser(6328A)and Ar+ laser were used. Based on the random variation of cavity length, characteristics of the medium index and mode competition effect, low-frequency beat and The beat frequency between modes of optical resonator with concave mirrors have been studied by the photomixing technique. In the experiment He-Ne laser(6328A)and Ar+ laser were used. Based on the random variation of cavity length, characteristics of the medium index and mode competition effect, low-frequency beat and noise continuums are explained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 105 (1984)
Heterodyne bias frequency-locking of tunable lasers
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We present here a new method for heterodyne bias frequency locking of tunable lasers and give the expression of the locking precision caused by the frequency instablity of local signal source. In the experiment we use two CO2 lasers locked each other, and dicussed the potential application of this technique to the measWe present here a new method for heterodyne bias frequency locking of tunable lasers and give the expression of the locking precision caused by the frequency instablity of local signal source. In the experiment we use two CO2 lasers locked each other, and dicussed the potential application of this technique to the measurement of short-term frequency stability of laser in different laser frequency spectra..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 110 (1984)
Laser thin films for frequency doubling——two-wavelength antireflection coating at 1.06 μm and 0.53 μm
Li Qinguo
We prepared a two-wavelength antireflection coating with three layers of equal thickness. The residual reflectivity achieved is 0.1-0.2% at the wavelengths 1.06 μm and 0.53μm.We prepared a two-wavelength antireflection coating with three layers of equal thickness. The residual reflectivity achieved is 0.1-0.2% at the wavelengths 1.06 μm and 0.53μm..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 114 (1984)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
When a mirror with a small hole is used in the CO2 double wavelength laser the tunable range is broadened. The temporal and spatial characters of the laser and the relationship between the wavelength tunability and the CO2 laser parameters are studied.When a mirror with a small hole is used in the CO2 double wavelength laser the tunable range is broadened. The temporal and spatial characters of the laser and the relationship between the wavelength tunability and the CO2 laser parameters are studied..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 118 (1984)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
An apparatus using TP801 microcomputer for measuring laser polarization degree is described. The relative measurement error is about 3%, and the uncertainty is less than ±10%. Any other laser parameters can be measured by simply changing the subroutine of the system.An apparatus using TP801 microcomputer for measuring laser polarization degree is described. The relative measurement error is about 3%, and the uncertainty is less than ±10%. Any other laser parameters can be measured by simply changing the subroutine of the system..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 120 (1984)
[in Chinese]
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The histological change of 100 removed uterus and parametrium specimens by laser photovaporization have been observed. It has been found that the small myoma and solitary adenocarcinoma within the uterian cavity can be removed by vaporization, but the tissue damage underneath the burned layer is the minimal. The experiThe histological change of 100 removed uterus and parametrium specimens by laser photovaporization have been observed. It has been found that the small myoma and solitary adenocarcinoma within the uterian cavity can be removed by vaporization, but the tissue damage underneath the burned layer is the minimal. The experiment suggests that YAG laser is safe and practical in gynecological surgery..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 121 (1984)
[in Chinese]
[in Chinese], and [in Chinese]
Reported here are the treatment method and curative effectiveness using low He-Ne laser needles.Reported here are the treatment method and curative effectiveness using low He-Ne laser needles..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 123 (1984)
[in Chinese]
[in Chinese], and [in Chinese]
This paper reports the penetration test on the living body with a low power He-Ne laser. The penetration depths of 25 mm in two layers of skin, hypodermis and muscularis, have been achieved.This paper reports the penetration test on the living body with a low power He-Ne laser. The penetration depths of 25 mm in two layers of skin, hypodermis and muscularis, have been achieved..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 125 (1984)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 126 (1984)
[in Chinese]
[in Chinese], [in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 126 (1984)
[in Chinese]
[in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 127 (1984)
[in Chinese]
[in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 127 (1984)
[in Chinese]
[in Chinese], and [in Chinese]
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 11, Issue 2, 127 (1984)
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