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Acta Optica Sinica
Contents
1988
Volume: 8 Issue 10
16 Article(s)
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Research Article
[in Chinese]
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 1 (1988)
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Diffraction and Gratings
OPTIMIZATION OF GRATING MULTI-BEAMSPLITTERS
Jari Turunen, Bian Xingao, and Jin Guofan
We derive a numerical method of calculating binary grating structures, which have predetermined gjatial spectra with a typical accuracy of less than one percent. As an experimental verification, we present test results of a grating that converts a plane wave into a central block of 11×11 uniformly diffracted waves
We derive a numerical method of calculating binary grating structures, which have predetermined gjatial spectra with a typical accuracy of less than one percent. As an experimental verification, we present test results of a grating that converts a plane wave into a central block of 11×11 uniformly diffracted waves..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 946 (1988)
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Holography
Reconstruction of 3-D refractive index fields by fast Fourier transform iteration
GAO YIQING, and DENG HANQUAN
In this paper, the reconstruction precision of Fast Fourier Transform Iteration has been studied by computer simulation with the priori knowledge of refractive index fields. The effects of increased input data error and limited total viewing angle on the precision are discussed. As an example, it has been used to recon
In this paper, the reconstruction precision of Fast Fourier Transform Iteration has been studied by computer simulation with the priori knowledge of refractive index fields. The effects of increased input data error and limited total viewing angle on the precision are discussed. As an example, it has been used to reconstruct the flame temper ture fields, and the results are compared with thermocouple measurements..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 892 (1988)
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Coded aperture imaging: A holographic inverse filtering approch
CHEN LINSEN, and JIANG YAGUANG
Several kinds of coded pictures have been decoded using the holographic inverse filter (HIF) with wide dynamic range. The performances of the HIF are discussed. The results of imaging two-dimensional objects optically by the spiral aperture (SA) and non-rednndant array (NRA), and also, the results of imaging the three-
Several kinds of coded pictures have been decoded using the holographic inverse filter (HIF) with wide dynamic range. The performances of the HIF are discussed. The results of imaging two-dimensional objects optically by the spiral aperture (SA) and non-rednndant array (NRA), and also, the results of imaging the three-dimenbional objects by NRA (optical tomography) are presented in the paper..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 899 (1988)
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Instrumentation, Measurement and Metrology
Absolute photoelectric shaft angle encoder with high accuracy
YE SHEnGXIANG
The principle, mechanism, accuracy and reliability of 19-bit and 21-bit absolute photoelectric shaft angle encoder -with high accuracy are described. The accuracy and reliability of the absolute encoder is enchanced significantly by means of interpolation of phase-shift resistance and sectionally and repeatedly correct
The principle, mechanism, accuracy and reliability of 19-bit and 21-bit absolute photoelectric shaft angle encoder -with high accuracy are described. The accuracy and reliability of the absolute encoder is enchanced significantly by means of interpolation of phase-shift resistance and sectionally and repeatedly correcting. The results measured are as follows: resolution accuracy σ = ±0.6 angle second, angle measurement accuracyσ2= ±1.2 angle second for the encoder of 19-bit; andσ1= ±0.2, σ22 =±0.62 respesti....
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 922 (1988)
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A submicron lithographic lens available to 1:1 stepper
WANG ZHIJIANG, SUN BAODING, Lu DENGWU, and JIANG JIANZHONG
The optical design and model experiment results of a lithographic lens available to 1:1 stepper -with a numerical aperture of 0.4 and field size of 10×10mm2 are degoribed. The optical design is based on Wynne-Dyson s 1:1 oatadioptrio system and some modifications have been made. The experimental results have shown
The optical design and model experiment results of a lithographic lens available to 1:1 stepper -with a numerical aperture of 0.4 and field size of 10×10mm2 are degoribed. The optical design is based on Wynne-Dyson s 1:1 oatadioptrio system and some modifications have been made. The experimental results have shown that the lens possesses submicron lithographic resolution..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 928 (1988)
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7-channeI FIR HCN laser interferometer for determining electron density profile on HT-6M TOKAMAK
Tong XINGDe, GUO QILIANG, and GAO XIAng
In this paper, the principle of interferoinetry for determining electron density Of plasma is presented. The structure of 7-ohannel interferometer and its measurement results on HT-6M TOKAMAK are described. The light source used in the interferometer is a o. w. glow HON laser with cavity length of 3.4M and power output
In this paper, the principle of interferoinetry for determining electron density Of plasma is presented. The structure of 7-ohannel interferometer and its measurement results on HT-6M TOKAMAK are described. The light source used in the interferometer is a o. w. glow HON laser with cavity length of 3.4M and power output about 100 mW at 337μm. The averaged electron density of 7 probing chords can be given simultaneously. The detectable sensitivity its 1/15 frige with temporal resolution of 0.lms. Through asymmetrical Abel inversion from the line integrals of phase shift of 7 chords, the electron density profile at different time or three dimensional diagram of space-time distrirbutions of electron density can be obtained..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 933 (1988)
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Lasers and Laser Optics
Annular output stable resonator of a high power CO
2
laser with large discharge volume
CHENG ZhAOgu, and H.J.J.Seguin
A stable resonator-with high power annular output operated at the stable boundary was studied theoretically and experimentally. In a high power transverse-flow CO2 laser with large active volume, the experimental results were obtained of output power with good beam quality and uniform near-field distribution.
A stable resonator-with high power annular output operated at the stable boundary was studied theoretically and experimentally. In a high power transverse-flow CO2 laser with large active volume, the experimental results were obtained of output power with good beam quality and uniform near-field distribution..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 905 (1988)
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A branch-selected CO-CO
2
compound laser
GUI ZHENXING, ZHANG SHunyi, SHEN GuirONG, and WAN BENWEN
In this paper we report a new type sealed-off branchseleeted CO-CO2 compound laser operating at room temperature for the first time. Approximate two handred lasing lines were obtained in the region of 5.2-6.3μm and 9.2-10.8μm. the highest output power of the stronger lines was about 2.5W(CO) and 10 W(CO2). The influenc
In this paper we report a new type sealed-off branchseleeted CO-CO2 compound laser operating at room temperature for the first time. Approximate two handred lasing lines were obtained in the region of 5.2-6.3μm and 9.2-10.8μm. the highest output power of the stronger lines was about 2.5W(CO) and 10 W(CO2). The influence of CO2 concentration in the gas mixture, discharge current and pressure on the power distribution of the lining speotram of CO and CO2 was investigated experimentally. The excitation processes for CO and CO2 molecules in the compound laser have been analyzed..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 911 (1988)
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β-BaB
2
O
4
optical parametric oscillator
CHEN QI, FAN QIKANO, Wu BIZHEN, and You Guiming
This paper reports firstly the single- and doubleresonant β-BaB2O4 optical parametric oscillators (OPO) pumped by second harmonics of a 1.064μm Nd:YAG laser. The tuning range of OPO covers 0.83-0.89,μ\m, 0.97-1.18μm and 1.63-1.73μm. The maximum energy output of SRO (Single-Resonant Oscillator) and DRO (Double-Resonant
This paper reports firstly the single- and doubleresonant β-BaB2O4 optical parametric oscillators (OPO) pumped by second harmonics of a 1.064μm Nd:YAG laser. The tuning range of OPO covers 0.83-0.89,μ\m, 0.97-1.18μm and 1.63-1.73μm. The maximum energy output of SRO (Single-Resonant Oscillator) and DRO (Double-Resonant Oscillator) s ImJ/pulse and 200μJ/pulee respectively..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 917 (1988)
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OPTOELECTRONICS
The second harmonic space resolved spectrum initiated by later produced plasma filament
Gu Min, Tan Weihan, Lin Zunqi, and Chen Wenhua
Space resolved spectra with both high spectral resolution (-0.2A) and spatial resolution (-2μm) of the second harmonic emission scattered at 90°to the laser axis were observed when both narrow band and broad band laser beams were adopted in an Al planar target experiment. After analyzing many phenomena, it has bee
Space resolved spectra with both high spectral resolution (-0.2A) and spatial resolution (-2μm) of the second harmonic emission scattered at 90°to the laser axis were observed when both narrow band and broad band laser beams were adopted in an Al planar target experiment. After analyzing many phenomena, it has been proved that the second harmonic emission observed at 90° to the laser axis is initiated by the interaction of laser with plasma filaments other than that of planar wave with plasmas. And theory is in agreement with experiment on the whole..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 940 (1988)
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Spectroscopy
Optically pumped Na
2
laser in near-infrared region
WANG ZTJGENG
Many laser lines from AlΣ3a+ state to XlΣa+ state of molecular sodium were generated by using a excitation source of a dye laser pumped by a XeCl excimer laser. With the aid of a resonator, the laser output was increased by more than 10 times.
Many laser lines from AlΣ3a+ state to XlΣa+ state of molecular sodium were generated by using a excitation source of a dye laser pumped by a XeCl excimer laser. With the aid of a resonator, the laser output was increased by more than 10 times..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 865 (1988)
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Excitonic electroreflectance spectrum of cuprous oxcide at room temperature
WANG XUAN, WANG GUIFEN, ZHANG GUANGTIN, MA GENYUAN, and ZHANG CHUENZUO
We have studied the blue-green and blue exciton series spectra of cuprous oxide (Cu2O) with electrolyte electroreflectanoe method at room temperature and performed experimental results to be the least-square fit to Aspnes theory. Comparing the fit results with the experimental results of reflection and absorption spect
We have studied the blue-green and blue exciton series spectra of cuprous oxide (Cu2O) with electrolyte electroreflectanoe method at room temperature and performed experimental results to be the least-square fit to Aspnes theory. Comparing the fit results with the experimental results of reflection and absorption spectra at low and room temperature, we get that the electaorefleotanoe spectra of Cu2O include not only n=l exciton effect of blue-green and blue series but also n=2 exctton effect. The eleotrorefleotance spectra of CuaO with different smoothing are measured and tho obvious spectral feature different is observed..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 871 (1988)
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Ellipsometric study on the interface of Pt-Si system
CHEN TUPEI, and HUANG BINGZEONG
Spectroscopic ellipsometric data, of which incident-light wavelength ranges from 3500 A to 6500 A, has been analyzed to determine the optical response of the interface between Pt and n-Si(111). The result shows an interface layer of thickness d2=30± 1 A, whose optical and dielectric properties are very different f
Spectroscopic ellipsometric data, of which incident-light wavelength ranges from 3500 A to 6500 A, has been analyzed to determine the optical response of the interface between Pt and n-Si(111). The result shows an interface layer of thickness d2=30± 1 A, whose optical and dielectric properties are very different from the ones of the Pt film or the Si substrate. At the same time, the apparent optical constant spectra and dielectric function spectra of the interface layer were obtained in this work. A calculation based oil the effective medium theory (EMT) was done to fit the dielectric function spectra of the interfaoe layer. The resnlt indiDates the existence of Si-rich oxide in the interface layer, which can be ascribed to tlie reduction of the natiye Si oxide oil the suxfaoe of Si substrate caused by Pt. The restil-fc also suggests ihat the interface layer is a physical and cLemioal mixing region of Pt, Si and Si-rioh oxide..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 877 (1988)
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Vibrational spectra of single crystal LAP and DLAP
CHEN TING, ZHENG LIYU, and XU DONG
A group-theory analysis of single crystal LAP has been made. LAP belongs to monoolinio system with space group P2, its total 222 eigen-modes are classified: Γ = 111A+111B. The polarized Raman spectra and reflected in rared spectra of LAP and DLAP have been recorded in the range of 50-3700 cm-1. The spectra lines have b
A group-theory analysis of single crystal LAP has been made. LAP belongs to monoolinio system with space group P2, its total 222 eigen-modes are classified: Γ = 111A+111B. The polarized Raman spectra and reflected in rared spectra of LAP and DLAP have been recorded in the range of 50-3700 cm-1. The spectra lines have been assigned to different atomic groups and the oompariflion of PO43- NH3+ and COO- groups in LAP and DLAP have been made. The experimental results confirms that the symmetry of DLAP is the same as that of LAP and deuterium broadens the region oi transparent..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 884 (1988)
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Thin Films
Study of optical properties of extreme thin silver layers
XU JINGJIANG, and TANS JINFA
Optical constants and optical propeties are studied and compared of the thermal vaporated and magnetron sputtered extreme thin silver layers by using the attenuated-eotal-reflection (ATR) technique. The curves of optical constants and optical absorpta-tncevs. film thickness are determined for both deposited methods, th
Optical constants and optical propeties are studied and compared of the thermal vaporated and magnetron sputtered extreme thin silver layers by using the attenuated-eotal-reflection (ATR) technique. The curves of optical constants and optical absorpta-tncevs. film thickness are determined for both deposited methods, the results agreen with the theoretical calculation..
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Acta Optica Sinica
Publication Date: Jan. 01, 1900
Vol. 8, Issue 10, 954 (1988)
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Diffraction and Gratings
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