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Journals >
Chinese Journal of Lasers
Contents
1996
Volume: 23 Issue 2
19 Article(s)
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Research Article
Optical Switching in C
60
/pMMA
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Mirrorless optical switching based on exited-state-absorption in C60/pMMA is studied. The experimental results are consistent with the theoretical simulations.
Mirrorless optical switching based on exited-state-absorption in C60/pMMA is studied. The experimental results are consistent with the theoretical simulations..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 129 (1996)
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A New pre-burning Circuit for pulsed Xenon Lamps
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A new pre-burning circuit designed for 4×65 F pulsed xenon lamas is ptesented in this paper. Since a half- bridge switching mode converter consisting of saturated transformer is employed, the step-up transformer, current-limiting resistor and trigger circuit which were involved in the previous circuit are no longe
A new pre-burning circuit designed for 4×65 F pulsed xenon lamas is ptesented in this paper. Since a half- bridge switching mode converter consisting of saturated transformer is employed, the step-up transformer, current-limiting resistor and trigger circuit which were involved in the previous circuit are no longer used in the new circuit. The volume and weight of the new circuit are obviously reduced while the efficiency is enhanced. The practical operation shows that this circuit is stable and reliable..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 132 (1996)
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Optically Addressed Spatial Light Modulator Using an α-Si: H pin photodiode
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We report the fabrication and operation of an optically addressed spatial light modulator(OASLM), consisting of a hydrogenated amorphous silicon (α-Si: H) pin photodiode as a photosensor and a twist nematic liquid crystal(TNLC) as the modulating material. The intrinsic and doped α-Si: H films are deposited continuously
We report the fabrication and operation of an optically addressed spatial light modulator(OASLM), consisting of a hydrogenated amorphous silicon (α-Si: H) pin photodiode as a photosensor and a twist nematic liquid crystal(TNLC) as the modulating material. The intrinsic and doped α-Si: H films are deposited continuously by pECVD method in a reaction chamber with a shutter. The optical measurement indicates that the OASLM has a resolution of at least 20 lp/mm. The contrast ratio under the 300 lux illumination of white light is higher than 25:1. The white light writing sensitivity is about 3 lux..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 135 (1996)
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Holography and Information Processing
A Vibration Analysis by Auxiliary-mirror Holography
[in Chinese], and [in Chinese]
A new technique of using auxiliary-mirror holography to analyse 3D vibration is proposed. The intensity distribution of the auxiliary-mirror time-averaged holographic interferogram is discussed. The solution in which the above holographic technique is used to measure the 3D amplitude and the method which draws informat
A new technique of using auxiliary-mirror holography to analyse 3D vibration is proposed. The intensity distribution of the auxiliary-mirror time-averaged holographic interferogram is discussed. The solution in which the above holographic technique is used to measure the 3D amplitude and the method which draws information of the virtual point sources of the refcrence beaxns with the help of quasi-same-position auxiliary-object holography are explained. The problem of the position of the zero order bright fringe of the auxiliary-mirror time-averaged holographic interferogram is analysed in theory..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 171 (1996)
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Image Enhancement by Using a photorefractive Crystal Cu:KNSBN
[in Chinese]
The enhancement processing is performed by using a photorefractive crystal Cu:KNSBN placed on the Fourier transform plane of a coherent system under,cettain conditions. A Leplacian operator is formed on the transform plane because of the phase conjugation effect inside the crystal. Experimental result and a brief theor
The enhancement processing is performed by using a photorefractive crystal Cu:KNSBN placed on the Fourier transform plane of a coherent system under,cettain conditions. A Leplacian operator is formed on the transform plane because of the phase conjugation effect inside the crystal. Experimental result and a brief theoretical analysis are presented..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 177 (1996)
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Laser Physics
TEM
00
Mode, High-repetition Rate Q-switching of LD pumped Nd: YVO
4
Lasers
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
pumped by a home-made diode-laser, Q-switching and single-axial mode prelasing Q-switching are achieved. For lower pumped power, optical-to-optical transverse effjency and slop efficiency are 2. 4% and 15% respectively when the output is TEM00 mode. Comparison is made to the LD pumped Nd: YAG laser.
pumped by a home-made diode-laser, Q-switching and single-axial mode prelasing Q-switching are achieved. For lower pumped power, optical-to-optical transverse effjency and slop efficiency are 2. 4% and 15% respectively when the output is TEM00 mode. Comparison is made to the LD pumped Nd: YAG laser..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 97 (1996)
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Wavelength Related Rate Equations for Two-segment Bistable Semiconductor Lasers
[in Chinese], [in Chinese], and [in Chinese]
Based on the physics fact, an extra equation has been introduced to specify the wavelength of the two-segment abeorptive bistable semiconductor lasers(TABLs). With appropriate modifications, conventional rate equations have been used to study the wavelength characteristics of the TABL. Calculations lead to a wavelength
Based on the physics fact, an extra equation has been introduced to specify the wavelength of the two-segment abeorptive bistable semiconductor lasers(TABLs). With appropriate modifications, conventional rate equations have been used to study the wavelength characteristics of the TABL. Calculations lead to a wavelength loop accompanying the hysteresis process, indicating a wavelength jump towards the longer wavelength at "switch-on" (sudden increase of output power) and a reverse process at "switch-off" (sudden decrease of output power) as shown in Fig.1 and Fig.2..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 102 (1996)
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Experimental Studies on CW and Self-mode-locked Ti: sapphire Lasers
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Experiments on CW and self-mode-locked Ti: sapphire lasers are conducted with the crystals produced in Shanghai Institute of Optics and Fine Mechanics, Academia Sinica(SIOFMAS). According to the results, the quality of the crystals are assessed.
Experiments on CW and self-mode-locked Ti: sapphire lasers are conducted with the crystals produced in Shanghai Institute of Optics and Fine Mechanics, Academia Sinica(SIOFMAS). According to the results, the quality of the crystals are assessed..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 107 (1996)
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Influence of the pump Beam Mode in a Logitudinally pumped CW Ti:sapphire Laser
[in Chinese], [in Chinese], and [in Chinese]
In this paper the influence of the pump beam mode on the efficiency and beam mode of a CW Ti: sapphire laser is discussed. The results have been compered with experiments.
In this paper the influence of the pump beam mode on the efficiency and beam mode of a CW Ti: sapphire laser is discussed. The results have been compered with experiments..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 111 (1996)
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Make of the practicable Broadband Laser Diode Module and Studies on its Characteristics
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Using DC-pBH laser diode(LD), the broadband LD module of practicable package type is developed. The LD module is studied and measured on the packaged LD model, involving small signal modulation characteristics and nonlinear distortion. Its 3 dB bandwidth of optical resonance is more than 2GHz. This device is able to sa
Using DC-pBH laser diode(LD), the broadband LD module of practicable package type is developed. The LD module is studied and measured on the packaged LD model, involving small signal modulation characteristics and nonlinear distortion. Its 3 dB bandwidth of optical resonance is more than 2GHz. This device is able to satisfy the bandwidth need of 2. 488 Gb/s in the optical fiber communication system and be used in the GHz microwave subcarrier multiplex optical fiber communication system..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 117 (1996)
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Effects of Group-velocity Dispersion on the Evolution of Optical pulses in a Mode-locked Laser Using a Single SHG Crystal
[in Chinese], and [in Chinese]
The effects of group-velocity dispersion in SHG crystal on the evolution of optical pulses in a mode-locked laser by a nonlinear mirror were analyzed. According to theoretic results, we have simulated the experiment in Ref. [5], the theoretic results were correspondent with the experimental results.
The effects of group-velocity dispersion in SHG crystal on the evolution of optical pulses in a mode-locked laser by a nonlinear mirror were analyzed. According to theoretic results, we have simulated the experiment in Ref. [5], the theoretic results were correspondent with the experimental results..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 123 (1996)
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Change of Dispersion and Absorption in a Medium Via a Coherent Coupling Field
[in Chinese], [in Chinese], and [in Chinese]
Characters of dispersion and absorption in a V-type atom system interacting with a coherent coupling field are investigsted. The real and imaginary parts of the polarization are calculated by density matrix equations when atomic coherence between the two lower levels occurs. The influence of different coupling field in
Characters of dispersion and absorption in a V-type atom system interacting with a coherent coupling field are investigsted. The real and imaginary parts of the polarization are calculated by density matrix equations when atomic coherence between the two lower levels occurs. The influence of different coupling field intensities as well as various rates of incoherent pumping on atomic absorption and dispersion is also considered..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 139 (1996)
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Simulation and Analysis of Nonlinear Effect of Laser Atmospheric propagation
[in Chinese], and [in Chinese]
The simulation of the nonlinear effects of laser atmospheric propagation is reported in this paper. A set of atmospheric hydrodynamics equations and nonlinear electromagnetic wave equation which interacts the atmosphere are given. The wave equation describing the stimulated thermal Rayleigh Scattering(STRS) induced sma
The simulation of the nonlinear effects of laser atmospheric propagation is reported in this paper. A set of atmospheric hydrodynamics equations and nonlinear electromagnetic wave equation which interacts the atmosphere are given. The wave equation describing the stimulated thermal Rayleigh Scattering(STRS) induced small perturbation instability is derived. And turbulence is theoretically treated. Basing on thais equations, we per formed a set of 4D programs(TURBLM) to simulate thermal blooming and phase compensation for it, small perturbation instability, and the interation of turbulence with thermal blooming. The simulated results accord with theories and experiments..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 144 (1996)
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The Upper Limit of the Order of the Supergaussian Beams
[in Chinese], [in Chinese], and [in Chinese]
In this paper, we prove that the order of a supergaussian beam has a upper limit, drive the analytic expression of the upper limit, and discuss some impbttant characters of the supergaussian beams.
In this paper, we prove that the order of a supergaussian beam has a upper limit, drive the analytic expression of the upper limit, and discuss some impbttant characters of the supergaussian beams..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 151 (1996)
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Theory of the Nonlinear Waveguide of Limited Length
[in Chinese], [in Chinese], and [in Chinese]
A theory is proposed for the limited length nonlinear weakly-guiding waveguide.An explicit expression is obtained for the field distribution.
A theory is proposed for the limited length nonlinear weakly-guiding waveguide.An explicit expression is obtained for the field distribution..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 156 (1996)
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The Axial Component of Beam Cross-section Angular Momentum is Conserved
[in Chinese], [in Chinese], and [in Chinese]
In this peper, we prove that, for any stable propagnting light beam in vacuum or in the symmetrically parexial ADCD system, the z components of beam cross-section angular momentum and angular momentum square are both.invariables which are independent of the position of the cross-section. Furthermore, we still discuss s
In this peper, we prove that, for any stable propagnting light beam in vacuum or in the symmetrically parexial ADCD system, the z components of beam cross-section angular momentum and angular momentum square are both.invariables which are independent of the position of the cross-section. Furthermore, we still discuss some characters of light beam which are relative to angular momentum..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 161 (1996)
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Spectral Control in the Injection-seeded CuBr Laser
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
In this paper we report the experimental results of controlling CuBr laser modes by using an injection seeding technique. We have amplified the single longitudinal mode CuBr laser pulses and obtained the narrowing-linewidth copper laser radiation with an average power of more than 100 mW. Theoretically, we have analyse
In this paper we report the experimental results of controlling CuBr laser modes by using an injection seeding technique. We have amplified the single longitudinal mode CuBr laser pulses and obtained the narrowing-linewidth copper laser radiation with an average power of more than 100 mW. Theoretically, we have analysed the injection seeding process in short-pulse high-gain lasers and discussed the experimental results in the injection seeded CuBr laser..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 166 (1996)
Get PDF
Materials and Thin Films
Investigation on Removal of OH Group in BaO-p
2
O
5
and R
2
O-BaO-p
2
O
5
System phosphate Laser Glasses by Means of RAp Method
[in Chinese], [in Chinese], and [in Chinese]
The effects of melting temperature and chemical reaction agents(CCl4, SOCl2 and pOCl3) on removal rates of OH group in BaO-p2O5 and R2O-BaO-p2O5 system phosphate arser Glasses are investigated. Relationship between the content of OH group and the fluorescence lifetime of Nd3+ in these glasses is discuased. Moreover, la
The effects of melting temperature and chemical reaction agents(CCl4, SOCl2 and pOCl3) on removal rates of OH group in BaO-p2O5 and R2O-BaO-p2O5 system phosphate arser Glasses are investigated. Relationship between the content of OH group and the fluorescence lifetime of Nd3+ in these glasses is discuased. Moreover, laser properties and physical properties of these glasses before and after OH group is removed by RAp method are compared..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 182 (1996)
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Study of the Response Time of Two-beam Coupling in photorefractive Crystals
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Considering the change of the grating modulation index, a united analytic formula of the response time for two-beam coupling is obtained by solving the dynamic equation of two-beam coupling. It involves paratmeters of crystals, incident intensity, full incident angle and signal-pump ratio. The experimental resultS usin
Considering the change of the grating modulation index, a united analytic formula of the response time for two-beam coupling is obtained by solving the dynamic equation of two-beam coupling. It involves paratmeters of crystals, incident intensity, full incident angle and signal-pump ratio. The experimental resultS using Ce:KNSBN crystal are in good agreement with the theory qualitatively..
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Chinese Journal of Lasers
Publication Date: Jan. 01, 1900
Vol. 23, Issue 2, 187 (1996)
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