Contents
1989
Volume: 9 Issue 1
17 Article(s)
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Research Article
Holography
A new adjustable pseudo-coloring method
ZHOU YiNG, and CHENG ZHENPKI
This paper presents a new optical method for density pseudo-coloring that the solor can be adhusted The method is based on the technique of phase image pseudo-coloring and ealizes adjustable pseudo-coloring by using the diffract effect of dual gratings and filtering technique in whitelight system. The paper proves the This paper presents a new optical method for density pseudo-coloring that the solor can be adhusted The method is based on the technique of phase image pseudo-coloring and ealizes adjustable pseudo-coloring by using the diffract effect of dual gratings and filtering technique in whitelight system. The paper proves the principle and verifies the validity of the theory by experiment. Certain images are processed. Both the theory and the experiment show that this method is effective..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 43 (1989)
Color pattern recognition with multi-wavelength FHF
Mu GUOGUNG, WGAWI ZHAOQI, and CHEN DONGQING
Various kinds of color-image correlation detection with polychromatic matched spatical filter (MSF) have been investigated. A new type of lensless intensity correlation with Fresnel holographic filter (FHF) has been presented. A combined technique is proposed in this paper by which the color pattern recognition can be Various kinds of color-image correlation detection with polychromatic matched spatical filter (MSF) have been investigated. A new type of lensless intensity correlation with Fresnel holographic filter (FHF) has been presented. A combined technique is proposed in this paper by which the color pattern recognition can be achieved with multi-wavelength FHF..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 50 (1989)
Making Spatial Frequency Filter for Deconvolution by Means of Abstracting the Transfer Function from the Image in an rotaional asymmetrical System
X. Q. SHBN, S. H. ZHENG, and F. H. LI
The transfer function of an electron-optical system with rotational asymmetrical aberrations is anisotropio in spatial frequency domain. By means of optioal, holographic and partial coherent method a new technique is suggested in this paper to abstract the transfer function from the electron micrograph.The phase and amThe transfer function of an electron-optical system with rotational asymmetrical aberrations is anisotropio in spatial frequency domain. By means of optioal, holographic and partial coherent method a new technique is suggested in this paper to abstract the transfer function from the electron micrograph.The phase and amplitude componets of spatial frequency filter are made. The resolution of electron micrograph with asymmetrical aberrations can be improved through the deconvolution..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 55 (1989)
Noise reduction in speckle photography fringe pattern using digital filtering
HU YIQUN
The noise sources and model in speckle photography fringe pattern is discussed and a noise filter for this model is designed. By means of orthogonal experiment, the effects of noise, visibility and fringe density on the measuring accuracy of fringe direction and space are analysed in detail.The noise sources and model in speckle photography fringe pattern is discussed and a noise filter for this model is designed. By means of orthogonal experiment, the effects of noise, visibility and fringe density on the measuring accuracy of fringe direction and space are analysed in detail..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 61 (1989)
Statistical properties of synthetically dynamic speckle via dual scattered light
PENG XIANG, and MA SHINING
Statistical properties of dynamic speckle with dual diffusing light combination from a rotating diffuser have been investigated under the condition of two Gaussian beams illumination.These properties are described by a specific space-time in tensity correlation function. We have derived the analytical expression of thiStatistical properties of dynamic speckle with dual diffusing light combination from a rotating diffuser have been investigated under the condition of two Gaussian beams illumination.These properties are described by a specific space-time in tensity correlation function. We have derived the analytical expression of this function and have confirmed this theoretical result with an experiment by using photon counting and photon correlation techniques..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 68 (1989)
Integrated Optics
A experimental study on interferometry of mul-timodal liquid-core optical fiber
LI ZOUWEI, HAN YUHUA, HOU LANTIAN, and GAO SHITQIN
This paper describes the properties of interferometer of the mul-timodal liquid-core optical fiber and indicatas the condition of the maximal visibility of interference fringe. Two examples of measured results of interference sensing are given.This paper describes the properties of interferometer of the mul-timodal liquid-core optical fiber and indicatas the condition of the maximal visibility of interference fringe. Two examples of measured results of interference sensing are given..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 34 (1989)
Analysis and computation on mode propagation and loss in ridge waveguide
MA CHUNSHENG, and LIU SHIYONG
After transforming the ridge waveguide into an equivalent slab waveguide by means of the effective index method, we have derived the expression of mode absorptive loss coefficient using the differentiation method. Based on. thes method, the optical characteristies of the ridge weak absorptive dielectric waveguide can bAfter transforming the ridge waveguide into an equivalent slab waveguide by means of the effective index method, we have derived the expression of mode absorptive loss coefficient using the differentiation method. Based on. thes method, the optical characteristies of the ridge weak absorptive dielectric waveguide can be easily analysed and calculated with high accuracy..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 38 (1989)
Lasers and Laser Optics
Photon statistics for the interaction of a three-level atom with single-mode cavity field
PENG YUENAN, LI XIAOSHEN, and LIU ZHENDONG
By means of the density operator method, the interaction of a three-level atom with single-mode cavity field is investigated. The photon statistics for the radiation Held is obtained and the effects of arbitrary detunings as well as the anti-bunching phenomenon are discussed.By means of the density operator method, the interaction of a three-level atom with single-mode cavity field is investigated. The photon statistics for the radiation Held is obtained and the effects of arbitrary detunings as well as the anti-bunching phenomenon are discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 18 (1989)
Cross-Coupled Asymmetric Offset Strip Composite Cavity Semiconductor Laser Array
WANG ZHENG, DU GUOTONG, and GAO DINGSAN
In this paper, we presented a new structure semiconductor laser array——Cross-Coupled Asymmetric Offset Strip Composite Cavity Semiconductor LaserArray. These arrays were composed of seven or nine asymmetric half electrode strips, whose positions were offseted. They from seven or nine composite cavities and the light inIn this paper, we presented a new structure semiconductor laser array——Cross-Coupled Asymmetric Offset Strip Composite Cavity Semiconductor LaserArray. These arrays were composed of seven or nine asymmetric half electrode strips, whose positions were offseted. They from seven or nine composite cavities and the light in which coupled in a cross way. Single-lobfar-field patterns of 3°-4°wide, were obtained from the array upto I= 1.6Ith..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 23 (1989)
Nonlinear Optics
A New Type of EPR Experiment Using Light Quanta Produced by A Nonlinear Optical Process
Y. H. Shih, and C. O Alley
A pair of correlated light quanta of 532 nm wavelength with the same linear polarization but divergent directions of propagation was produced by non-linear optical parametric down conversion in a crystal of deuterated potassium di-hydrogen phosphate from a 100 ps duration laser pulse of 266 nm wavelength. Each light quA pair of correlated light quanta of 532 nm wavelength with the same linear polarization but divergent directions of propagation was produced by non-linear optical parametric down conversion in a crystal of deuterated potassium di-hydrogen phosphate from a 100 ps duration laser pulse of 266 nm wavelength. Each light quantum was converted to a circular polarization state or a linear polarization state (orthogonal) and was reflected by a turning mirror to superpose with the other at a beam splitter to produce a two-quantum superposition state. For ooinoident detection of the two liglit quanta at separated detectors, oorrelaliions of the Einstein-Podolsky-Rosen type for the polarizations have been observed as predicted by our analysis. In preliminary runa with limited bata we have measured a violation of Bell's inequality by three standard deviations. We are planning to extend our experiments to include a truly random delayed choioe between two analyser settings at each detector while maintaining a spaoelike separation between the detectors..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 1 (1989)
Optics at Surfaces
Probing Polymerization of L-B Mono-Molecular Layers by Surface Second Harmonic Generation
Yu GONG-DA, CHEN GANG, LI LE, and ZHANG ZHIMING
Probing polymerization of L-B mono-molecular layers by optical SHG is firstly reported. Changes of the nonlinear polarizability of the molecular layers can be explained by using the theory of atom-radical and valence bond. Morever, it is suggested that the monomer molecular layer adjacent to the surface is polymerized Probing polymerization of L-B mono-molecular layers by optical SHG is firstly reported. Changes of the nonlinear polarizability of the molecular layers can be explained by using the theory of atom-radical and valence bond. Morever, it is suggested that the monomer molecular layer adjacent to the surface is polymerized earlier than the other layera..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 28 (1989)
Physical Optics
The Conditions Compensated for Fiber Dispersion by Phase Conjugation
NING JI-PING, LIU JI-JUN, YAO JIAN QUAN, and Wu YUAN-SHENG
It was proved theoretically and experimentlly that the frequency flipping of phase conjugation can be used to compensate the dispersive effect in fibers. From Fourier transformation in the dispersive optical fibers we derived the condition in which the quadratic dispersive effect in the fibers can be neglected. The curIt was proved theoretically and experimentlly that the frequency flipping of phase conjugation can be used to compensate the dispersive effect in fibers. From Fourier transformation in the dispersive optical fibers we derived the condition in which the quadratic dispersive effect in the fibers can be neglected. The curves of bandwidth and reflectivity of the conjugate mirror versus nonlinear medium length and | K| L are obtained.The Primary factors affecting compensation for fiber dispersion are found out..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 81 (1989)
Rapid Communications
Investigation of a novel integrated optics microdisplacement sensor
CAI BORONG, CHEN ZHENG, and LI YUXIANG
This paper reports a novel integrated optics microdisplacement sensor which has been fabricated in our Labs, based on S. Honkanen s proposal. The NA approach is firstly used for ca]culating the characteristics of the sensor and all the performances of the device are measured. The theoretical analysis and experimental rThis paper reports a novel integrated optics microdisplacement sensor which has been fabricated in our Labs, based on S. Honkanen s proposal. The NA approach is firstly used for ca]culating the characteristics of the sensor and all the performances of the device are measured. The theoretical analysis and experimental results are in agreement basically. Several ways to improve the sensitivity of the device are presented. The sensor could be used in a wide area, such as vibration, acceleration and acoustic sensing etc..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 88 (1989)
Wide-Temperature And Low-Loss Single-Mode Directional Coupler
LU SHAN DA, FENG MING HE, and HUANG YONG
This paper describes the fabrication of a wide-temperature and low-loss fused single-mode optioalfibre coupler. The device is fabricated from standard communication fibre. The specifications of the packaga device at 1.52μm are as follows: splitting at 0(?)50%,splitting ratio tolerance 40 dB. The splitting ratio is highThis paper describes the fabrication of a wide-temperature and low-loss fused single-mode optioalfibre coupler. The device is fabricated from standard communication fibre. The specifications of the packaga device at 1.52μm are as follows: splitting at 0(?)50%,splitting ratio tolerance <±5%, operating temperature range from -30 to +70℃, insertion loss <0.2dB, directivity >40 dB. The splitting ratio is highly sensitive to operating wavelength, but insensitive to polarization of input light..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 93 (1989)
Spectroscopy
Photonemission-spectra from a laser dressed atom
Li SHIFANG, and LIN FUCHENG
The evolution of the photonemigsion-spectra from a laser dressed atom is Investigated theoretically. The processes preparing initiative state and the effect of the initiative state on the exciting and spontaneous processes are discussed. The compasison of quantum theory and semiclassical theory for this study is made, The evolution of the photonemigsion-spectra from a laser dressed atom is Investigated theoretically. The processes preparing initiative state and the effect of the initiative state on the exciting and spontaneous processes are discussed. The compasison of quantum theory and semiclassical theory for this study is made, when the drive field is coherent state, they are equivalent. The feature of the photonemission-spectra, its evonlation and some physical problems related to them are also discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 10 (1989)
Thin Films
A Method for multiple angle of incidence ellipsometic analysis in determination of double-layer optical thin film parameters
ZHANG RUIZI, LUO JINSHEN, and CHEN MIQI
A method for multiple angle of incidence (MAI) ellipsometric analysis in determination of double-layer optical thin film parameters is described. The error factory and the choice of the optimal measurement conditions of optical thin film parpmeters in MAI ellipsometric analysis are dicussed. It is showed that the methoA method for multiple angle of incidence (MAI) ellipsometric analysis in determination of double-layer optical thin film parameters is described. The error factory and the choice of the optimal measurement conditions of optical thin film parpmeters in MAI ellipsometric analysis are dicussed. It is showed that the method enables the determination of all the optical parameters and thickness of double-layer film system with a high accuracy if the systems are of sufficient thickness. This fact is illustrated with tha samples of Si/SiO2/Si3N4 and Si/SiO2/poly-Si systems. The method can be extended to analyzing the mutilayer optical "bhin film systems..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 9, Issue 1, 75 (1989)
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