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《Laser & Optoelectronics Progress》 2012-08
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Study on the Angle Mismatching Heterodyne Detection Technology Based on Array Detector

Dong Hongzhou Ao Mingwu Yang Ruofu Wu jian Yang Chunping(School of Optoelectronic Information,University of Electronic Science and Technology,Chengdu,Sichuan 610054,China)  
The angle between signal light and local light is an important factor affecting the heterodyne detection.Even a small angle will lead the intermediate frequency signal to be weak.It is pointed out that the amplitude of the intermediate frequency signal can be regarded as the Fourier transform of the distribution function of quantum efficiency of detector.Based on that,a method using array detector in which the gain of unit is adjustable is proposed.One can form an effective quantum efficiency function matching the spatial mismatch angle by adjusting the gain magnification coefficient,which can enhance the intermediate frequency signal intensity.According to the method,high-speed scanning detection can be realized by a programmable controller.
【CateGory Index】： TN247
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【Citations】
Chinese Journal Full-text Database 3 Hits
1 Wang Liusan1,2,3 Cao Zhensong1,2 Wang Huan1,2,3 Zhao Hui1,2,3 Gao Wei1,2,3Yuan Yiqian1,2 Chen Weidong4 Zhang Weijun1,3 Gao Xiaoming1,2,3(1Key Laboratory of Atmospheric Composition and Optical Radiation,Chinese Academy of Sciences,Hefei,Anhui 230031,China 2Center for Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China 3Environmental Spectroscopy Laboratory,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China 4 Laboratoire de Physicochimie de l'Atmosphère,Université du Littoral CAote d'Opale,Dunkerque 59140,France);A Widely Tunable Mid-Infrared Difference Frequency Generation Laser and Its Detection of Atmospheric Water[J];Acta Optica Sinica;2011-04
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【Co-citations】
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1 Li Peipei Tang Haibo She Weilong(State Key Laboratory of Optoelectronic Materials and Technology,Sun Yat-Sen University, Guangzhou,Guangdong 510275,China);Efficient Electro-Optical Controlled Difference-Frequency Conversion in Quasi-Periodic Optical Superlattice[J];Acta Optica Sinica;2012-06
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3 Shang Liang1,2 Zhang Lichun1 Qi Limei1,2(Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, School of Physics and Engineering,Qufu Normal University,Qufu,Shandong 273165,China);Design of Hollow-Core Bragg Fiber with Broadband Transmission for Trace-Gas Detection[J];Chinese Journal of Lasers;2013-02
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