Journals >Chinese Journal of Lasers
Contents
1990
Volume: 17 Issue 11
15 Article(s)
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Research Article
Determination of zero-time delay among picosecond light pulses by using wave-mixing in GaAs chips
[in Chinese], and [in Chinese]
Zero-time delay amony picosecond light pulses can be determined by using time-delay dependent energy-transfer in GaAs chips. This new method has been proved to b e convenient and accurate in the determination of zero-time delay among light pulses at small intersection angles.Zero-time delay amony picosecond light pulses can be determined by using time-delay dependent energy-transfer in GaAs chips. This new method has been proved to b e convenient and accurate in the determination of zero-time delay among light pulses at small intersection angles..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 654 (1990)
Evaluating refractive indices of optical waves in biaxial crystals from refractive indices ellipsoid equation
[in Chinese]
The coordinate transformations are made for the refractive indices ellipsoid equa tion of biaxial cryatals. The formulations of refractive indices of optical waves whose velocity is slower or faster are derived and the polarized directions of coresponding optical are given.The coordinate transformations are made for the refractive indices ellipsoid equa tion of biaxial cryatals. The formulations of refractive indices of optical waves whose velocity is slower or faster are derived and the polarized directions of coresponding optical are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 692 (1990)
Experimental research on mode-selection and Q-switching for Nd:glass lasers
[in Chinese], [in Chinese], and [in Chinese]
Experimental results of transvorse mode-selection are given by using pre-pulse Q-switching on Nd: glass laser. Compared with small hole mode-selection, it has more energy output.Experimental results of transvorse mode-selection are given by using pre-pulse Q-switching on Nd: glass laser. Compared with small hole mode-selection, it has more energy output..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 695 (1990)
Energy and density of electrons in a hollow cathode discharge supplied with pulsed current
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The energy and density of electrons in argon hollow cathodo discharge (HCD) supplied with pulsed current are measured by a cylindrical double probe system. The measured energy and density of electron are 7.1-17.5eV and 1.2×l013-4.1×l013cm respectively, when the de preionization current is 80mA, the pressure rThe energy and density of electrons in argon hollow cathodo discharge (HCD) supplied with pulsed current are measured by a cylindrical double probe system. The measured energy and density of electron are 7.1-17.5eV and 1.2×l013-4.1×l013cm respectively, when the de preionization current is 80mA, the pressure range is 0.3-0.6 Torr and the pulse voltage range varies from 1.4 to 2.2 kV..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 698 (1990)
Measuring the third susceptibility in absorbing medium
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A method is discussed to measure the third susceptibility X(3) by degenerate four wave mixing (DFWM) in the absorping medium, the reason is found out for the saturation of the reflectivity of DFWM at high pumping intensity, and some data of x(3) in the absorbing media were given.A method is discussed to measure the third susceptibility X(3) by degenerate four wave mixing (DFWM) in the absorping medium, the reason is found out for the saturation of the reflectivity of DFWM at high pumping intensity, and some data of x(3) in the absorbing media were given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 702 (1990)
Holography and Information Processing
Multi-bits optical parallel full adder by carry lookahead
[in Chinese], [in Chinese], and [in Chinese]
The course of logic operations of carry lookahead adder for binary number is introduced into optical computation. The carry lookahead by optical parallel processing is proposed. The parallel logic operations of PD-LED are realized by using encod edsignals with space array. The logic operations of PD-LED are studied. anThe course of logic operations of carry lookahead adder for binary number is introduced into optical computation. The carry lookahead by optical parallel processing is proposed. The parallel logic operations of PD-LED are realized by using encod edsignals with space array. The logic operations of PD-LED are studied. and experiment of optical parallel carry lookahead adder for many bits is carried out, with satisfactory results..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 672 (1990)
Computer-generated holographic optical element capable of simultaneously performing OR and XOR logic operations
[in Chinese]
Optical realization of simultaneous OR and XOR operations between two images is proposed. The optical element whioh can perform the above-mentioned logical operations is made by means of CGH. Experimental results are presented and some discussions are given.Optical realization of simultaneous OR and XOR operations between two images is proposed. The optical element whioh can perform the above-mentioned logical operations is made by means of CGH. Experimental results are presented and some discussions are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 677 (1990)
Optimization of wobble flag for sampled format optical disks
[in Chinese], and [in Chinese]
Characteristics of sampled format optical disk are analysed briefly, the influence of different wobble flags on the tracking error signal is discussed and a wobble flag structure capable of obtaining the maximum tracking servo signal gain is put forward.Characteristics of sampled format optical disk are analysed briefly, the influence of different wobble flags on the tracking error signal is discussed and a wobble flag structure capable of obtaining the maximum tracking servo signal gain is put forward..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 681 (1990)
Imaging characristics of a GRIN fiber lens with constant refractive-index surfaces of revolution paraboloids
[in Chinese], and [in Chinese]
The ray propagating and paraxial imaging characteristics of a GRIN fiber lens with constant refractive-index surfaces of revolution paraboloids are studied. The exact analytical "solutions for the ray paths are obtained from diffirential equation on light ray. The equivalent focal length and the formulas for deterThe ray propagating and paraxial imaging characteristics of a GRIN fiber lens with constant refractive-index surfaces of revolution paraboloids are studied. The exact analytical "solutions for the ray paths are obtained from diffirential equation on light ray. The equivalent focal length and the formulas for determing the principal planes, focal planes are derived and the Gaussian imaging formulas are also given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 685 (1990)
Laser Physics
Theoretical modeling of discharge pumped XeCl lasers
[in Chinese], [in Chinese], and [in Chinese]
The kinetics of XeCl excimer lasers pumped by distributed circuits of both the transmission line and Blumlein line are analysed. By solving the Boltzmann equation, energy balance equation, electric circuit equation and laser oscillator equation, numerical results are obtained and are compared with the experimental resuThe kinetics of XeCl excimer lasers pumped by distributed circuits of both the transmission line and Blumlein line are analysed. By solving the Boltzmann equation, energy balance equation, electric circuit equation and laser oscillator equation, numerical results are obtained and are compared with the experimental results..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 641 (1990)
Complete mode-locked semiconductor lasers
[in Chinese], and [in Chinese]
Complete active mode-locking have been achieved with a F-P etalon in a GaAs/GaAlAs semiconductor laser with external cavity and 13.5ps pulses without substructures at 925MHz repetition frequency have been obtained.Complete active mode-locking have been achieved with a F-P etalon in a GaAs/GaAlAs semiconductor laser with external cavity and 13.5ps pulses without substructures at 925MHz repetition frequency have been obtained..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 650 (1990)
Self similarity solution for volume ignition of laser fusion
[in Chinese], and [in Chinese]
An isober heating is used to derive Hora's empirical formula for fusion gains, then a self similarity solution and theealculation are presented. The numerical results obtained agree essentially with the analytical solution on the whole.An isober heating is used to derive Hora's empirical formula for fusion gains, then a self similarity solution and theealculation are presented. The numerical results obtained agree essentially with the analytical solution on the whole..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 658 (1990)
Optical SHG study on oxygen adsorbed silver surface
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Optical second-harmonic-generation study on the adsorption of oxygen on a polycrystalline Ag in an UHV chamber is reported. It demonstrates that oxygen is only adsorbed in molecular state at low Ag temperature. Heating up to 175K leads to dissociation of the oxygen mole cules, resulting in an atomic oxygen adsorbtion. Optical second-harmonic-generation study on the adsorption of oxygen on a polycrystalline Ag in an UHV chamber is reported. It demonstrates that oxygen is only adsorbed in molecular state at low Ag temperature. Heating up to 175K leads to dissociation of the oxygen mole cules, resulting in an atomic oxygen adsorbtion. At 330K, Ag surface is covered completely by the atomic oxygen..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 665 (1990)
A study of cracking metal surface melted by laser
[in Chinese], [in Chinese], and [in Chinese]
The reason for cracking of the metal surface melted by laser was analyzed theoretically. The ways of preventing the metal surface melted by laser from cracking were pointed out and its feasibility was verified experimentally.The reason for cracking of the metal surface melted by laser was analyzed theoretically. The ways of preventing the metal surface melted by laser from cracking were pointed out and its feasibility was verified experimentally..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 669 (1990)
A new dielectric facet protector and AR film for semiconductor light-emitting devices
[in Chinese], and [in Chinese]
Experimental results are presented for the first time for sputtered AIN film which is a protector and AR film on the facet of semiconductor light-emitting devices. The technical conditions for obtaing sputtered AIN film and its properties are given.Experimental results are presented for the first time for sputtered AIN film which is a protector and AR film on the facet of semiconductor light-emitting devices. The technical conditions for obtaing sputtered AIN film and its properties are given..
Chinese Journal of Lasers
- Publication Date: Jan. 01, 1900
- Vol. 17, Issue 11, 690 (1990)
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