基于迈克耳孙干涉仪的微机械光纤信号调制器
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摘要
基于迈克耳孙干涉仪原理,设计了利用双光束干涉效应的微机械光纤信号调制器。实验中从输入端输入的光纤信号,经分光板后分为光强相等的透射光束与反射光束;调制信号以电压形式加载于压电陶瓷,使其伸缩振荡,以调制透射光束与反射光束之间的光程差;透射光束与反射光束经透镜聚焦后在输出端面发生双光束干涉,在输出端输出被调制的光信号,再耦合进光纤。这种光纤信号调制器属于振幅调制类型,实验中光纤信号调制器调制度优于90%,信噪比约为18 dB,带宽约为200 kHz。此调制器件具有结构简洁、调制度高、稳定性好和价格低廉,适用于全光纤光路的特点,可应用于低频光纤传输信号的调制及信号斩波等。
A micro-mechanical modulator is designed based on the Michelson interferometer.In the experiment,the fiber signal is input from the input-sport and divided into two equal parts: the transmitted beam and the reflected beam,by beam-splitter.The modulating voltage signal is amplified and drives the piezoelectric ceramic pipe to do stretch oscittation in order to modulate the optical-path difference between the transmitted beam and the reflected beam.The transmitted beam and the reflected beam are interfered at the output-port and focused into fiber again.Then a modulated fiber signal is obtained.The modulator is operated for amplitude modulation.In the experiment,the modulation ratio is prior to 90%,signal-to-noise ratio is about 18 dB,and the bandwidth is also about 200 kHz.This device has the merit of high modulation ratio and low price,and can be applied as a modulator or chopper in optical signal transmission system.
A micro-mechanical modulator is designed based on the Michelson interferometer.In the experiment,the fiber signal is input from the input-sport and divided into two equal parts: the transmitted beam and the reflected beam,by beam-splitter.The modulating voltage signal is amplified and drives the piezoelectric ceramic pipe to do stretch oscittation in order to modulate the optical-path difference between the transmitted beam and the reflected beam.The transmitted beam and the reflected beam are interfered at the output-port and focused into fiber again.Then a modulated fiber signal is obtained.The modulator is operated for amplitude modulation.In the experiment,the modulation ratio is prior to 90%,signal-to-noise ratio is about 18 dB,and the bandwidth is also about 200 kHz.This device has the merit of high modulation ratio and low price,and can be applied as a modulator or chopper in optical signal transmission system.
引文
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10 Wu Bo,Chen Caihe,Ding Guilanet al..Integrated optical chipsin a Michelson interference acceleration seismic geophone[J].Optoelectronics.Laser,2003,14(8):791~794吴波,陈才和,丁桂兰等.迈克耳孙干涉型加速度地震检波器集成芯片[J].光电子.激光,2003,14(8):791~794
11 Zhang Tao,Sun Lining,Cai Hegao.Study on the fundamentalcharacteristics of piezoelectric element[J].Optics and PrecisionEngineering,1998,6(5):26~32张涛,孙立宁,蔡鹤皋.压电陶瓷基本特性研究[J].光学精密工程,1998,6(5):26~32
12 Li Shumin,Tang Jun.Studying the characteristics ofpiezoelectric ceramics with Michelson interferometer[J].PhysicsExperiment,2008,28(6):42~43李书民,唐军.应用迈克尔孙干涉仪研究压电陶瓷的特性[J].物理实验,2008,28(6):42~43
13 Zhao Kaihua,Zhong Xihua.Optics[M].Beijing:PekingUniversity Press,1984.309~311赵凯华,钟锡华.光学(上册)[M].北京:北京大学出版社,1984.309~311
2 Jiang Yuesong.Optical Technology and Experimental[M].Beijing:Beijing Institute of Technology Press,2000.196~197江月松.光电子技术与实验[M].北京:北京理工大学出版社,2000.196~197
3 Zhang Tianhao,Jia Feng,Man Jiangweiet al..A new type ofmodulator for signal in fiber[J].Optoelectronics.Laser,2006,17(5):526~528张天浩,贾峰,满江伟等.新型光纤信号调制器[J].光电子.激光,2006,17(5):526~528
4 Man Jiangwei,Niu Kai,Wang Shunliet al..A new type ofmodulator for signal in fiber based on the multiple-beaminterference[J].Optoelectronics.Laser,2007,18(6):669~671满江伟,牛凯,王顺利等.基于回波干涉效应的新型光纤信号调制器[J].光电子.激光,2007,18(6):669~671
5 Shi Lingna,Pan Yingjun,Zhang Jieet al..Study of displayproperties of lighting source based on grating light modulator[J].Acta Optica Sinica,2010,30(2):531~536史玲娜,潘英俊,张洁等.基于光栅光调制器的照明光源的显示特性研究[J].光学学报,2010,30(2):531~536
6 Zhang Zhihai.Study of laser projection display based on micro-opto-electro-mechanical system grating moving light modulator[J].Chinese J.Lasers,2010,37(3):663~667张智海.微光机电系统光栅平动式光调制器的激光投影研究[J].中国激光,2010,37(3):663~667
7 Wang Yuying.Application of MME to optical communications[J].OME Information,2003,9:9~14王玉英.微机电一体化技术基础在光通信中的应用[J].光机电信息,2003,9:9~14
8 Shen Weidong,Zhu Yong,Huang Biqin.Analysis of the micro-optical electromechanical system filters tunable property[J].ActaOptica Sinica,2004,24(8):1125~1129沈伟东,朱勇,黄弼秦.微光机电系统滤波器可调谐特性分析[J].光学学报,2004,24(8):1125~1129
9 Xiang Sihua,Chen Sihai,Wu Xinet al..Study amd test on anovel fast laear scanner based on piezo-actuators[J].Chinese J.Lasers,2010,37(2):408~413向思桦,陈四海,吴鑫等.一种基于压电驱动器的新型高速激光扫描器的研制和测试[J].中国激光,2010,37(2):408~413
10 Wu Bo,Chen Caihe,Ding Guilanet al..Integrated optical chipsin a Michelson interference acceleration seismic geophone[J].Optoelectronics.Laser,2003,14(8):791~794吴波,陈才和,丁桂兰等.迈克耳孙干涉型加速度地震检波器集成芯片[J].光电子.激光,2003,14(8):791~794
11 Zhang Tao,Sun Lining,Cai Hegao.Study on the fundamentalcharacteristics of piezoelectric element[J].Optics and PrecisionEngineering,1998,6(5):26~32张涛,孙立宁,蔡鹤皋.压电陶瓷基本特性研究[J].光学精密工程,1998,6(5):26~32
12 Li Shumin,Tang Jun.Studying the characteristics ofpiezoelectric ceramics with Michelson interferometer[J].PhysicsExperiment,2008,28(6):42~43李书民,唐军.应用迈克尔孙干涉仪研究压电陶瓷的特性[J].物理实验,2008,28(6):42~43
13 Zhao Kaihua,Zhong Xihua.Optics[M].Beijing:PekingUniversity Press,1984.309~311赵凯华,钟锡华.光学(上册)[M].北京:北京大学出版社,1984.309~311
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