Contents
1984
Volume: 4 Issue 6
19 Article(s)
Export citation format
Research Article
Fourier Optics and Signal Processing
Contour-Mapping of phase objects on Moire shadow-casting
LIU LIREN
Based on the Moire effect in shadow-casting of two coded masks a new kind of optical method is proposed to map phase variation on the object image with an extended incoherent illumination. Detailed analyses are given to the relations between the functions of masks and the systems of contourlines or the background fringBased on the Moire effect in shadow-casting of two coded masks a new kind of optical method is proposed to map phase variation on the object image with an extended incoherent illumination. Detailed analyses are given to the relations between the functions of masks and the systems of contourlines or the background fringes. The misfocusing effect and the evaluation of the configuration parameters are discussed. It is shown that this technique has advantages over interferometry..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 522 (1984)
Theoretical analysis on contrast reversal of a rectangular grating encoded picture
WANG SHUYING, ZHANG JINGJIANG, and PENG FANGLIN
A new theoretical analysis of the contrast reversal images for the zeroth and other diffraction order encoded by a rectangular grating is given. According to the principle that the contrast reversion is formed by subtraction of amplitudes, this paper proposed a physical model for the transmittance of an encoded pictureA new theoretical analysis of the contrast reversal images for the zeroth and other diffraction order encoded by a rectangular grating is given. According to the principle that the contrast reversion is formed by subtraction of amplitudes, this paper proposed a physical model for the transmittance of an encoded picture. By means of Fourier analysis, a correct result is derived which fits well with the experimental results..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 528 (1984)
On the talbot self-imaging conditions of plane periodical objects
BAI GUIRU, WAN ZHIMING, and LI QIANG
The talbot self-imaging conditions of the plane periodical objects are presented. It is proved theoretically that restriction of the angle v, 2RaRb cos r=integer, is not a necessary condition. If the cross terms of the spatial frequencies for the unit cell of periodical object are much smaller than the main frequency tThe talbot self-imaging conditions of the plane periodical objects are presented. It is proved theoretically that restriction of the angle v, 2RaRb cos r=integer, is not a necessary condition. If the cross terms of the spatial frequencies for the unit cell of periodical object are much smaller than the main frequency terms, the restriction of the angle is not necessary. In this case, any two-dimensional periodical object can be self-imaged. The experimental results presented in this paper are in accordance with the theoretical analysis..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 535 (1984)
Lasers and Laser Optics
Orthogonal property of optical resonator eigenmodes
FANG HONGLIE
In this note a general orthogonal property of optical resonator eigenmodes is analyzed. The orthogonality in the (u*, U) sense of the eigonmodes U and their adjoint modes u is obtained.In this note a general orthogonal property of optical resonator eigenmodes is analyzed. The orthogonality in the (u*, U) sense of the eigonmodes U and their adjoint modes u is obtained..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 481 (1984)
Spectra] and lasing properties of UV new laser dye DPDO series
GAO ZHENHENG, ZHOU YIMIN, PAN JIAXING, WANG MINGZHEN, SHAO ZIWEN, and YUE Chuanhua
This paper describes the characteristics of laser dye DPDO series which are new compounds of the 2, 6-di(p-, -m-, or o- substituted phenyl) -benzo -bisoxazols. Typical absorption spectra and fluorescence spectra of DPDO are given, and the tuning curves of dye laser with such compounds excited by N2 laser are measured. This paper describes the characteristics of laser dye DPDO series which are new compounds of the 2, 6-di(p-, -m-, or o- substituted phenyl) -benzo -bisoxazols. Typical absorption spectra and fluorescence spectra of DPDO are given, and the tuning curves of dye laser with such compounds excited by N2 laser are measured. It is found that the DPDO series are working in the spectral region of 371 to 394 nm and having the conversion efficiency approximately double to that of BPBD. The DPDO series also have good pliotoohemioal stability. The outpui of dye laser does not decrease aftsr eight Jiour3 nitrogen laser excitation at 200 kW paak power and 5Hz repetition rate. The dye solution can be used at intervals and preserved for 2~3 years but yet maintains its performance. The series of DPDO can be divided into two types according to their structures. Typs I with symmetric center structure lias higher conversion efficiency buij more “red” peak wavelength than type II which has not a symmetric center..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 485 (1984)
Photoacoustic measurement of fluorescence quantum efficiencies in Nd3+: glass
LI ZBNGFA, ZHANG GUANGYIN, JIANG XUENHAO, and QIAO ZHONGGE
A new method for measuring fluorescence quantum efficiencies of active ions in Nd3+: glass is described. According to the principle of photoaooustic signal, the fluorescence quantum efficiencies has been calculated with the measured values of absorption amplitudes at two absorption peaks and the amplitudes of photoacouA new method for measuring fluorescence quantum efficiencies of active ions in Nd3+: glass is described. According to the principle of photoaooustic signal, the fluorescence quantum efficiencies has been calculated with the measured values of absorption amplitudes at two absorption peaks and the amplitudes of photoacoustic signals at the same wavelengthes for the Nd3+ ions in Nd3+: glass. The obtained results are in good agreement with those calculated and measured by other methods..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 489 (1984)
The MBE growth of GaAs-GaxAl1-xAs DH lasers
ZHONG JINGCHANG
The growth conditions for MBE-grown GaAs-GaxAl1-xAs DH lasers are reported which include the temperature-time cycles with a lower growth temperature, in-situ growth of ohmic contact electrode layer, and an annealing process after growth. The experiments indicate that the use of source materials with high purity, BN effThe growth conditions for MBE-grown GaAs-GaxAl1-xAs DH lasers are reported which include the temperature-time cycles with a lower growth temperature, in-situ growth of ohmic contact electrode layer, and an annealing process after growth. The experiments indicate that the use of source materials with high purity, BN effusion cells, and the cryopump in the system play important roles in reducing the threshold current density of the lasers and improving their optical and electrical performance..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 494 (1984)
Mode behavior of integrated twin-planar-stripe GaAs-(GaAl) As lasers
XIAO ZONGYAO, PAN HUIZHEN, and CHEN LIANYONG
In this paper, variation of mode behavior in integrated twin-planar-stripe GaAs-(GaAl)As lasers with drive current and ambient temperature is investigated. The optical injection lock-in action of two active cavities and the influence of lateral-mode instability on a single longitudinal-mode operation are discussed and In this paper, variation of mode behavior in integrated twin-planar-stripe GaAs-(GaAl)As lasers with drive current and ambient temperature is investigated. The optical injection lock-in action of two active cavities and the influence of lateral-mode instability on a single longitudinal-mode operation are discussed and analysed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 499 (1984)
Application of opto-galvanic effect in probing the properties of CO gas laser medium
WANG YUMIN, GUI ZENXIN, and ZHANG SHUNYI
Some new applications of the optogalvanic spectroscopy technique is proposed in present paper. Under fixed discharge condition, using the intra-cavity optogalvanio technique, the saturation parameters of CO laser medium and its dependence on the temperature and current have been measured. By measuring small-signal optoSome new applications of the optogalvanic spectroscopy technique is proposed in present paper. Under fixed discharge condition, using the intra-cavity optogalvanio technique, the saturation parameters of CO laser medium and its dependence on the temperature and current have been measured. By measuring small-signal optogalvanic signal responsivity, the gain distribution and the ratio of the population of vibrational levels have been obtained and the resonance self-absorption of a few lines has been obtained and the resonance self-absorption of a few lines has been, observed. The method is simple and rapid, so it may be used for real-time measnromenl of some dynamic parameters in gas laser..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 507 (1984)
Nonlinear Optics
Second harmonic generation of Cu vapor laser by using a β-BaB2O4 crystal
ZHANG GUIYAN, JIM CHUNYANG, LIN FUCHENG, CHEN CHuANGTIAN, and WU BOCHANG
UV coherent light at the wavelegnth of 255 nm and 289 nm was generated by using a copper vapour laser and a β-BaB2o4 frequency doubling crystal. The average output power of the second harmonic is about 3.5mW and the corresponding peak power is 7W when the fundamental input is about 0.5W. The frequency doubling efficienUV coherent light at the wavelegnth of 255 nm and 289 nm was generated by using a copper vapour laser and a β-BaB2o4 frequency doubling crystal. The average output power of the second harmonic is about 3.5mW and the corresponding peak power is 7W when the fundamental input is about 0.5W. The frequency doubling efficiency is 0.7%. The whole setup is very simple..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 513 (1984)
Double Stockes-line of transient SRS in ethylene glycol
QIU PEIHUA, LI QUN, and WANG WENYAO
The transient SES double Stockes-line in ethylene glycol by using the picosecond pulse train generated by a Nd-glass laser system with frequency doubling KDP crystal is described. The central wavelengthes of the double Stockes lines are 6246.5A and 6288.64 A respectively. The double Stockes lines are included by the syThe transient SES double Stockes-line in ethylene glycol by using the picosecond pulse train generated by a Nd-glass laser system with frequency doubling KDP crystal is described. The central wavelengthes of the double Stockes lines are 6246.5A and 6288.64 A respectively. The double Stockes lines are included by the symmetric and asymmetric vibrations of (OH)2 group of ethylene glycol. SES double lines coinside with Raman spectrum of HO·CH2·OH2·OH quite well..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 517 (1984)
Physical Optics
Modes in the diffused optical waveguides with Gaussian index profile
SHI BANGBEN, and WEN YUSHUI
Modes in diffused optical waveguides with an asymmetrical Gaussian refractive index profile are treated by perturbation method in this paper. The first order perturbational approximate modal field analytical expression and a dispersion equation are obtained.Modes in diffused optical waveguides with an asymmetrical Gaussian refractive index profile are treated by perturbation method in this paper. The first order perturbational approximate modal field analytical expression and a dispersion equation are obtained..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 541 (1984)
Rapid Communications
Spectrum characteristics of Pb1-xSnxTe tunable diode lasers
ZHANG WEIZAI, CAO GENDI, ZHU XUOCHUN, and WANG HAILONG
In this paper, the characteristics and parameters of the tunable diode laser fabricated by HUVG method are reported. At 12 K, the pulse threshold current density is about 370 A/cm2 and OW threshold current density is about 440 A/cm2. At 13K, current tuning rate is about 0.15 cm-1/mA; at 400 mA, temperature tuning rate In this paper, the characteristics and parameters of the tunable diode laser fabricated by HUVG method are reported. At 12 K, the pulse threshold current density is about 370 A/cm2 and OW threshold current density is about 440 A/cm2. At 13K, current tuning rate is about 0.15 cm-1/mA; at 400 mA, temperature tuning rate is about 2.3.
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 553 (1984)
Stability of a ring cavity for colliding pulse mode-locking
XING QIRONG, ZHANG REBING, and WANG QINGYUE
Stability of a six-mirror ring laser cavity for colliding pulse mode-locking is analysed by using matrix method. A simple analytical result is obtained. The results are significant for disign and alignment of the ring laser cavity.Stability of a six-mirror ring laser cavity for colliding pulse mode-locking is analysed by using matrix method. A simple analytical result is obtained. The results are significant for disign and alignment of the ring laser cavity..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 558 (1984)
Influence of water content on lasing properties in Nd-phosphate glasses
LI ZHONGYA, CHEN ZEXING, and ZHANG JUNCHANG
In this paper, the influences of the residual water content on the fluorescence properties, lasing thresholds and efficiencies, and gains of the laser amplifers are studied in the Nd-doped phosphate glasses.In this paper, the influences of the residual water content on the fluorescence properties, lasing thresholds and efficiencies, and gains of the laser amplifers are studied in the Nd-doped phosphate glasses..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 562 (1984)
Double optimization damped least squares method for automatic lens design
YAO DUOSHUN
In order to solve the problem of automatic optimization of the weighting factor in the DLS method for automatic lens design, the concept of the uniformizing factor of weight is proposed in this paper. The merit function could be made automatically out of false local minimum during optimization by means of automatic adjIn order to solve the problem of automatic optimization of the weighting factor in the DLS method for automatic lens design, the concept of the uniformizing factor of weight is proposed in this paper. The merit function could be made automatically out of false local minimum during optimization by means of automatic adjustment of the uniformizing factor of weight in the program. The program and a practical example are also given in this paper..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 566 (1984)
Steady-state pulses in laser amplifiers
FU SHUFEN, and FANG HONGLIE
An analytic solution for small gain to the rate equations of a lser amplifier was obtained. The conditions of getting "steady-state" pulses, and the effect of pumping on deforming of the pulses were analyzed.An analytic solution for small gain to the rate equations of a lser amplifier was obtained. The conditions of getting "steady-state" pulses, and the effect of pumping on deforming of the pulses were analyzed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 572 (1984)
Spectroscopy
Application of deconvolution and self-deconvolution techniques in infrared spectroscopy
QIAN LIN, LI ZHANZHI, and XU GUOLIANG
This paper discussed a generalized application of Fourier self-deconvolution to IB spectrum measurement. Two methods are introduced in order to suppress the increase in high frequency region, which is caused by F. F. T.. Several examples of IR spectra are given to illustrate the application of deconvolution and self-deThis paper discussed a generalized application of Fourier self-deconvolution to IB spectrum measurement. Two methods are introduced in order to suppress the increase in high frequency region, which is caused by F. F. T.. Several examples of IR spectra are given to illustrate the application of deconvolution and self-deconvolution techniques..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 6, 546 (1984)
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20