2012 Vol. 24, No. 07

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Hplpb
2012, 24.
Nonlinear theory of beam-wave interaction in gyro-TWT with spiral waveguide
Xue Zhihao, Liu Pukun, Du Chaohai
2012, 24: 1513-1514. doi: 10.3788/HPLPB20122407.1513
Abstract:
Gyro-TWT (traveling wave tube) with helical waveguide has wider instantaneous frequency bandwidth than that with smooth waveguide. This paper introduces the nonlinear theory of its beam-wave interaction. The calculation shows that, the electron effic...
A semiconductor saturable absorber mirror passively Qswitched fiber laser near 2 μm band
Yang Weiqiang, Hou Jing, Zhang Bin, Song Rui, Liu Zejin
2012, 24: 1515-1516.
Abstract:
A passively Q switched fiber laser near 2 m band was obtained based on semiconductor saturable absorber mirror and fiber grating. The central wavelength of the laser was 1958.2 nm. The pulse repetition rate of output signal increases with the rise of...
Research progress of fabricating polyvinyl alcohol coating on plastic microsphere
Su Lin, Chen Sufen, Liu Meifang, Zhang Zhanwen, Yao Hong, Li Bo, Liu Yiyang
2012, 24: 1517-1522.
Abstract:
In the procedures of designing polystyrene-polyvinyl alcohol-CH (carbon and hydrogen elements) (PS-PVA-CH) triple-layer microspheres, there are many methods such as drop-tower technique, emulsion micro-encapsulation, dip (spin) coating, interfacial p...
Organic thin-film transistors and their application to sensors
Zhang Lin, Zhong Jian
2012, 24: 1523-1527.
Abstract:
Organic thin-film transistors (OTFTs) have attracted extensive attention due to their unique properties, such as the diversity of organic materials, easy fabrication approaches and compatibility with flexible substrates. This paper introduces the res...
Far-field properties of nonparaxial electromagnetic cosh-Gaussian pulsed beams
Wang Haixia, Zhang Baixin, Ding Chaoliang, Zhao Zhiguo, Pan Liuzhan
2012, 24: 1528-1532.
Abstract:
By using the generalized Rayleigh-Sommerfeld diffraction integral, the analytical expression for the cross-spectral density matrix of nonparaxial spatially and spectrally partially coherent electromagnetic Cosh-Gaussian(ChG) pulsed beams propagating ...
Image processing based method for detecting zero time of launching
Fan Youchen, Li Yingchun, Han Yi, Guo Huichao
2012, 24: 1533-1538.
Abstract:
A method based on image processing is proposed to measure the zero time of launching, after the analysis on the disadvantages of the current methods. The method is a non-contact measurement based on high frame rate camera and image processing techniq...
Removal of water vapor content in singlet oxygen flow using cold-jet method
Deng Liezheng, Shi Wenbo, Du Shuyan, Yang Heping, Sha Guohe, Zhang Cunhao
2012, 24: 1539-1543.
Abstract:
To improve the performances of chemical oxygen iodine laser (COIL), experiments were done for the removal of water vapor content in singlet oxygen gas flows by using -117 ℃ ethanol (C2H5OH), -110 ℃ freon (CCI3F) and -45 ℃,50% hydrogen peroxide (H2O2)...
Influence of quartz tube on electric field intensity in parallel WR-430 waveguide resonant cavity
Wang Zhong, Zhang Guixin, Zhang Qing, Jia Zhidong
2012, 24: 1544-1548.
Abstract:
The influence of quartz tube on the electric field intensity in the parallel WR-430 waveguide resonant cavity is discussed. The electric field intensity has an abrupt change like a positive impulse near every slot and the impulse peak increases along...
Multi-output synchronous triggering technology based on inductive transformer principle
Lei Yu, Qiu Jian, Liu Kefu
2012, 24: 1549-1554.
Abstract:
For the requirements of triggering numerous gas switches in linear transformer drivers (LTD) synchronously, a multi-output synchronous triggering technology named LTD-trigger is proposed based on the reversed-LTD configuration and inductive transform...
Diagnosis of Richtmyer-Meshkov instability in shock tube using shearing interferometric tomography
Liu Shouxian, Chen Guanghua, Huang Wenbin, Yuan Shuyun, Wang Detain, Li Zeren, Peng Qixian
2012, 24: 1555-1560.
Abstract:
The paper presents the numerical and experimental study of shearing interferometric tomography for Richtmyer-Meshkov instability diagnosis. On the basis of simultaneous algebraic reconstruction technique (SART), a method is presented to compute the p...
Density match during fabrication process of poly(a-methylstyrene) mandrels by microencapsulation
Chen Sufen, Su Lin, Liu Yiyang, Li Bo, Qi Xiaobo, Zhang Zhanwen, Liu Meifang
2012, 24: 1561-1565.
Abstract:
During the curing process of double emulsions for fabricating poly(a-methylstyrene) (PAMS) capsules by microencapsulation technology, the match of density between the water in oil compound droplet and the outer water phase is vital to the sphericity ...
Permanent magnet assembly for particle spectrometer
Li Bian, Wang Lei, Xu Liang, Ye Jian, Wang Linmei, Tan Fuming, Wang Jingdong, Zhang Ming
2012, 24: 1566-1568.
Abstract:
A permanent magnet assembly is presented according to the primary requirement for the magnetic field in the particle spectrometer. The permanent magnet assembly adopts the C-type magnetic circuit along with assistant magnets. Magnet circuits are vali...
Design of large-orbit electron gun for 8 mm third-harmonic peniotron
Wu Xinhui, Li Jiayin, Zhao Xiaoyun, Hu Biao, Li Tianming
2012, 24: 1569-1574.
Abstract:
According to current magnetic and processing conditions, a gradually-changing reversal magnetic system and a practical 8 mm third-harmonic peniotron electron gun are designed. This large-orbit electron gun is designed under the operating voltage of 4...
Scintillator’s sensitivity calibration method in synchrotron radiation facility
He Xiaoan, Du Huabing, Li CHaoguang, Yi Rongqing, Xiao Tiqiao
2012, 24: 1575-1578.
Abstract:
Researches on scintillators sensitivity calibration method has been carried out recently in Shanghai synchrotron radiation facility. By some experimental researches in light source and detectors linearity, it built a new method for calibrating scinti...
Terminal load response law of coaxial cable to continuous wave electromagnetic irradiation
Pan Xiaodong, Wei Guanghui, Li Xinfeng, Lu Xinfu
2012, 24: 1579-1583.
Abstract:
In order to study the coupling response law of continuous wave electromagnetic irradiation to coaxial cable, the typical RF coaxial cable is selected as the object under test. The equipment or subsystem connected by coaxial cable is equivalent to a l...
Development of an emittance measurement instrument based on embedded system
Wang Jiale, Cheng Jian, Li Nannan
2012, 24: 1584-1588.
Abstract:
An emittance measurement instrument based on embedded system was introduced. The instrument was based on slit-wire method. It had seven different measurement ranges, and its data sampling rate was up to 200 kHz. The system construction and working pr...
Ionization beam profile monitor design for tandem accelerator
Zhangyaofeng
2012, 24: 1589-1594.
Abstract:
The ionization beam profile monitor(IPM) was designed for the beamline of GIC4117 tandem accelerator. The key aspects of the design, such as the calculation of collecting signal intensity, design and optimization of the electric and magnetic field sy...
Compensation of leakage flux on insulated core flat winding transformer
Kang Cheng, Liu Yonghao, Huang Jianming, Li Deming
2012, 24: 1595-1598.
Abstract:
Solid insulating materials may increase the leakage flux of insulated core flat winding transformer(ICFWT). This results in a low generated voltage in the secondary coils, especially on the upper stages. Parallelly connecting an appropriate compensat...
Design of a small-sized expanded coaxial line antenna at L-band
Yan Feng, Ning Hui, Liu Xiaolong, Jiang Xing
2012, 24: 1599-1602.
Abstract:
In order to reduce the size and gain of the high power microwave measurement receiving antenna, a small-sized expanded coaxial line antenna operating at L-band has been designed. The structure optimization was achieved by theoretical analysis and num...
Proton beam writing with scanning proton microprobe
Lei Qiantao, Liu Jiangfeng, Bao Liangman, Zhang Zhongjian, Yu Benhai, Li XiaoLin
2012, 24: 1603-1607.
Abstract:
Proton beam writing(PBW) is a direct-writing technique that uses a highly focused MeV proton beam to pattern structures of micro- or nano-dimensions in a suitable resist material. The PBW instrumentation was established on the scanning proton micropr...
Lifetime test of organic light-emitting device in high vacuum and usual package
Li Shuanghong, Li Junjian, Liang Ning
2012, 24: 1608-1610.
Abstract:
This article introduces two experiments: one is the lifetime test of organic light-emitting device(OLED) packaged by UV cured epoxy resin in a high vacuum environment after being unpackaged, the other is the lifetime test of unpackaged OLED in atmosp...
Aberration correction ability of bimorph deformable mirror
Liu Wenjin, Ning Yu, Dong Lizhi, Yan Hu, Lei Xiang, Yang Ping, Xu Bing
2012, 24: 1611-1614.
Abstract:
The impacts of effective aperture size and beam incident angle on the aberration correction ability of a 20-actuator bimorph deformable mirror whose clear aperture is 30 mm are numerically analyzed based on measured influence functions. Numerical sim...
Three dimensional wedge-shaped cathode field emission model
Peng Kai, Xia Mengzhong, Yang Chao, Liu Dagang
2012, 24: 1615-1618.
Abstract:
The physical mechanism of field emission was analyzed. The launch conditions of field emission in three-dimensional Yee grid model were deduced and implemented, and the Pade grid algorithm was used to encrypt the cutting-edge grid. The current-voltag...
Gas permeability of barrier materials
Wang Jing, Li Junjian, Wu Qipeng
2012, 24: 1619-1623.
Abstract:
The theoretical formula of gas permeation acceleration factor was derived for barrier materials under different gas temperature and pressure. The theoretical calculation results are consistent with the experimental results (in the literature). The pe...
Driving and controlling circuit for full-color OLED based on ARM7
Zhang Xiang, Jiang Quan
2012, 24: 1624-1628.
Abstract:
The paper introduces the design of driving circuit, reset circuit, download circuit, interface circuit and driving programs of the full-color passive OLED(organic light emitting device) module in the display system. The system adopts the LPC2138, fam...
Rapid thermal annealing effect on Cu(In, Ga)Se2 solar cells
Yang Jie, Chen Dongsheng, Zheng Lingling, Du Huiwei, Zhou Pinghua, Shi Jianwei, Xu Fei, Ma Zhongquan
2012, 24: 1629-1632.
Abstract:
The paper studies the rapid thermal annealing(RTA) effect on Cu(In, Ga)Se2 (CIGS) solar cells at different annealing temperatures by photoluminescence(PL). Continuous RTA was applied to CIGS solar cells to study annealing effect on film defects. Seve...
Alternated red-emitting organic light-emitting diode
Chen Jiule, Zhong Jian, Gao Juan
2012, 24: 1633-1637.
Abstract:
The article describes a highly effective alternated red-emitting organic light-emitting diode(OLED), which uses 9,9-spirobifluoren-2-yl-diphenyl-phosphine oxide (SPPO1) with high triple state as the host and hole-blocking layer and Bis(1-phenyl-isoqu...
Fin-type heat dissipation structure of light emitting diode lamp
Zhang Xinbiao, Yan Gaoshi, Kuang Yunfan, Li Yuli
2012, 24: 1638-1640.
Abstract:
The heat dissipating area of light emitting diode (LED) is calculated and the model of LED heat dissipation with platy cooling fins is established and simulated by ANSYS. When the ratio of fin spacing and fin thickness is 3∶2 or the ratio of fin thic...
Measurement of phase-shift coefficient of piezoelectric fiber optic phase modulator
Luo Wen, Geng Chao, Li Xinyang
2012, 24: 1641-1644.
Abstract:
The theoretical formula of phase-shift coefficient of piezoelectric fiber optic phase modulator is introduced, and a measuring method of the phase-shift coefficient is suggested based on Youngs two-slit interference principle. The feasibility of this...
Heterojunction organic solar cell based on flexible substrate
Zhong Jian, Yu Jiangtao, Liu Feng
2012, 24: 1645-1647.
Abstract:
Organic thin film solar cells based on flexible substrate were studied, which were prepared by using poly (3, 4-ethylenedioxythiophene): poly (4-styrenesulfonic acid) (PEDOT: PSS) as an anode modification layer, poly (2-methoxy, 5-(2-ethylhexyloxy)-1...
Characteristics of hybrid photodiodes based on organic-ZnO nanowires
Li Jie, Jiang Quan
2012, 24: 1648-1650.
Abstract:
One-dimensional ZnO nanowires were fabricated by using the hydrothermal technique. By changing the orientation of the ZnO nanowires (horizontal and vertical) and using differentp-type semiconductor materials, hybrid organic-ZnO nanowire photodiodes w...
Diagnostic method of wavefront aberration for gain mediums in slab lasers
Lei Xiang, Dong Lizhi, Yang Ping, Yan Hu, Liu Wenjin, Wang Shuai, Xu Bing
2012, 24: 1651-1655.
Abstract:
Forty-seven pieces of slab gain mediums were measured using this diagnostic method and the results show that the wavefront aberrations of slab gain mediums are affected by the processes like coating. The measurement results were classified by PV (pea...
Laser power measurement uncertainty of array detectors under oblique incidence
Gao Xueyan, He JunzhanG, Xie Chuanlin, Yuan Xuewen, Tian XiaoqianG, Zhou ZhiqianG
2012, 24: 1656-1662.
Abstract:
In order to measure laser power accurately under oblique incidence, a correction method for power responsivity of array detectors according to incidence angle is adopted. The expressions of directional cosines and incidence angle depending on the pos...
Beam cleanup of slab laser with 37-element bimorph deformable mirror
Yan Hu, Lei Xiang, Liu Wenjin, Wang Shuai, Gao Yuan, Dong Lizhi, Yang Ping, Xu Bing,
2012, 24: 1663-1666.
Abstract:
A laser beam cleanup system based on a 37-element bimorph deformable mirror (DM) is presented, to correct the wavefront aberrations of slab laser amplifier and improve the output laser beam quality. The strip-shaped laser beam is expanded by a cylind...
Non-local effect in Brillouin optical time-domain analyzer based on Raman amplification
Jia Xinhong, Rao YunJiang, Wang Zinan, Zhang Weili, Ran Zengling, Deng Kun, Yang Zixin
2012, 24: 1667-1671.
Abstract:
Compared with conventional Brillouin optical time-domain analyzer (BOTDA), the BOTDA based on Raman amplification allows longer sensing range, higher signal-to-noise ratio and higher measurement accuracy. However, the non-local effect induced by pump...
Polarization characteristic of organic polymer asymmetric ridge waveguide
Gao Yuan, ZhanG Xiaoxia, Liao Jinkun
2012, 24: 1672-1676.
Abstract:
With the organic polymer ridge waveguide as the research object, the polarization characteristic of symmetric ridge waveguides with different ridge heights, ridge widths and core thicknesses were systematically analyzed by a semi-vector finite-differ...
Beam quality and wavefront aberration in coherent combination of three rectangular laser beams
Tan Yi, Li Xinyang,
2012, 24: 1677-1682.
Abstract:
A numerical simulation model of coherent combination of three rectangular beams was established. The relationship for one rectangular beam and the combination of three rectangular beams, between the beam quality factor (beta factor) and the Zernike w...
End-pumped coupling system based on large-aperture laser diode array
Wang Zhenguo, Duan Wentao, Zheng Jiangang, Jiang Xinying, Yan XiongWei, Li Mingzhong
2012, 24: 1683-1686.
Abstract:
In order to meet the pump power density requirements of room-temperature Yb: YAG laser amplifier, a coupling system of high contraction coefficient has been designed. Laser diode (LD) arrays of 80 kW output power are arranged to be spherical. Orthogo...
Annular lapping of large-aperture reflective component
Xie Lei, Ma Ping, Liu Yibin, You Yunfeng, Yan Dingyao
2012, 24: 1687-1690.
Abstract:
The paper investigates the annular lapping process of large-aperture reflective component. A 610 mm440 mm85 mm reflective component was processed by a lapping machine with a 4 m-diameter lapping disk. In order to improve the surface flatness of the o...
Optimization of beam intensity distributions with intracavity bimorph deformable mirror
Dong Lizhi, Lei Xiang, Liu Wenjin, Yang Ping, Yan Hu, Xu Bing
2012, 24: 1691-1694.
Abstract:
An intracavity adaptive optics system is presented for optimizing beam intensity profiles of an flashlamp-pumped Nd:YAG laser. The rear mirror of the laser is replaced by a 20-element bimorph deformable mirror controlled by a stochastic parallel grad...
Effect of magnetorheological finishing on mid-spatial frequency error
Xu Xi, Yang Liming, Shi Qikai, Lei Xiangyang, Hou Jing
2012, 24: 1695-1699.
Abstract:
Experiments on magnetorheological finishing (MRF) were carried out to remove the subsurface defect (SSD) layer left by conventional polishing. The simulation and experiment results show that, the scanning interval of MRF will lead to the mid-spatial ...
Application of cone pinhole in high energy solid-state laser system
Zhang Xin, Zhou Wei, Hu Dongxia, Lin Donghui, Deng Wu, Zhao Junpu, Dai Wanjun, Wang Yuancheng, Tang Ling
2012, 24: 1700-1704.
Abstract:
The cone pinhole that is a new structure pinhole is used for spatial filtering in high solid-state laser system. Its smooth inner surface will reflect the unwanted light to prevent plasma closure that easily happens in high energy running. The compar...
Control system of all-digital phase-locked loop for phase-shift laser ranging
Kuang Yunfan, Yan Gaoshi, Zhang Xinbiao
2012, 24: 1705-1708.
Abstract:
This paper introduces an FPGA-based all-digital phase-locked loop(ADPLL) control system for phase-shift laser ranging. The system can improve the accuracy of the phase frequency detector and is immune to the effects of temperature and voltage, thus s...
Optical and mechanical design of beam-target coupling sensor
Wang Liquan, Li Tianen, Feng Bin, Xiang Yong, Li Keyu, Zhong Wei, Liu Guodong
2012, 24: 1709-1714.
Abstract:
A sensor based on conjugate principle has been designed for matching the light beams and the target in inertial confinement fusion. It can avoid the direct illumination of the simulation collimating light on the target under test in targeting process...
Four-wave-mixing-based multi-wavelength clock reshaping
Le Tianzhi, Wu Baojian, Wen Feng
2012, 24: 1715-1717.
Abstract:
Two-wavelength clock reshaping via four-wave mixing has been studied by simulation. A pump which is shared by the two channels of clock signals is coupled into the highly nonlinear fiber with a probe. Interchannel crosstalk of four-wave mixing can be...
Propagation characteristics of nanometer-level broadband chirped pulsein high power laser system
Liu Lanqin, Zhang Ying, Wang Wenyi, Huang Wanqing, Mo Lei, Guo Dan, Jing Feng
2012, 24: 1718-1722.
Abstract:
High frequency spatial modulation induced by Fresnel diffraction of broadband nanosecond chirped laser pulse were studied. It shows that the hundreds-nm broadband pulse has some effects on Fresnel diffraction, while the tens-nm one has hardly any. Mo...
All-optical signal reshaping system design utilizing degenerate four-wave mixing in fibers
Tian Fengfeng, Wu Baojian, Zhou Heng
2012, 24: 1723-1726.
Abstract:
The paper presents the solutions of coupled-waves equations of degenerate four-wave mixing (DFWM) numerically. The results show that the power increase of pump wave can decrease the period of energy interchange of pump and anti-Stokes waves, and the ...
Cascaded nonlinear processes during propagation of femtosecond laser pulses in nonlinear optical crystals
Wen Jing, Zhou Wei, Deng Wu, Zhang Xin, Dai Wanjun, Tang Ling, Wang Yuancheng, Hu Dongxia
2012, 24: 1727-1731.
Abstract:
This paper reviews the authors recent work on cascaded nonlinear processes, revealing that cascaded nonlinear processes can lead to energy transfer between different wavelengths and spectral broadening caused by the second-order cascaded processes ca...
Generation of chaos in semiconductor ring laser with optical injection
Zhang Xin, Yuan Guohui, Wang Zhuoran
2012, 24: 1732-1736.
Abstract:
The unidirectional master-slave scheme for generating chaos is demonstrated, which consists of a distributed feedback laser and a semiconductor ring laser(SRL). The SRL, under suitable bias current, has a chaotic output due to an optical injection fr...
Nonlinear Sagnac interferometry for improving signal-to-noise ratio of short pulse
Zhang Ying, Sun Li, Huang Wanqing, Xie Na, Zhou Kainan, Zeng Xiaoming, Wang Xiaodong, Liu Lanqin, Zhu Qihua
2012, 24: 1737-1740.
Abstract:
This paper demonstrates several factors that affect the signal-to-noise ratio(SNR) improvement ability and the energy conversion efficiency of nonlinear Sagnac interferometry. The efficiency can be improved by controlling the spatial distribution of ...
Factors affecting focusing performance of continuous phase plate concentration
Zhang Yuanhang, Yang Chunlin, Wen Shenglin, Yan Hao, Wang Jian, Yang Liming
2012, 24: 1741-1744.
Abstract:
To improve the far field focal spot in inertial confinement fusion, the paper analyzes the main factors affecting the focusing performance of continuous phase plates. The encircled energy fraction and the far-field root-mean-square spot size are anal...
Control of microstructure and laser induced damage threshold of antireflective silica films
Yan Lianghong, Lü Haibing, Yan Hongwei, Zhao Songnan, Wang Tao, Li Xibin, Wang Haijun, Yuan Xiaodong
2012, 24: 1745-1748.
Abstract:
Polyvinyl butyral (PVB) modified antireflective silica films were deposited on fused silica substrates by sol-gel process. The effect of PVB on the microstructure and laser induced damage threshold (LIDT) of the films was investigated. The results of...
Design of photonic drop splitters for TE modes in a silicon photonic crystal
Chen Xiyao, Li Hui, Qiu Yishen, Qiang Zexuan, Li Junjun, Zhuang Dongxia
2012, 24: 1749-1753.
Abstract:
The paper reports 13 and 12 photonic drop splitters (PDSs) for TE modes in a silicon photonic crystal based on self-collimation effect. The 13 PDS consists of four beam splitters and the 12 PDS consists of three beam splitters and one mirror. The the...
Magnetic guiding of cold atoms in radio-frequency waveguide
Ma Hongyu, Han Yiping
2012, 24: 1754-1756.
Abstract:
The model of a radio-frequency waveguide was built. The interaction potential of Rb cold atoms with the magnetic field in the radio-frequency waveguide was analyzed. When an electric current is input into the coils of the waveguide, the potential dep...
Mitigating laser induced damage in fused silica with CO2 laser
Li Xibin, Liu Chunming, Wang Haijun, Yuan Xiaodong, He Shaobo, Xiang Xia, Zheng Wanguo
2012, 24: 1757-1760.
Abstract:
Laser induced damage sites in fused silica were irradiated by a galvanometer scanned CO2 laser. Most damage sites are completely repaired (no ablation deposits, air bubbles and cracks) and the largest is 500 m in diameter. Compared with localized mit...
Optimization of ultrasonic cleaning of optics
Wang Gang, Ma Ping, Qiu Fumin, Hu Jiangchuan, Yan Dingyao
2012, 24: 1761-1764.
Abstract:
An experimental study on ultrasonic cleaning of optics was carried out. Optimization of the cleaning process was performed through comparative experiments with different cleaning reagents and temperatures. The optimized cleaning process removes both ...