基于法拉第旋转镜的相位可调光电振荡器
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摘要
为了有效实现光电振荡器(OEO)输出信号相位可调,提出了一种基于法拉第旋转镜的OEO。利用放大器和滤波器构成电增益环腔,电增益环腔、直接调制半导体激光器(DFB-LD)和光电检测器构成OEO环路。通过光分路器得到经过调制后的光信号,结合级联光环形器和法拉第旋转镜结构,改变级联法拉第旋转镜的个数,可以对应得到相位延迟90~360°的射频(RF)信号,在实验结构简单的条件下,有效实现了OEO输出信号的相位调谐。实验结果表明,每增加一组光环形器和法拉第旋转镜结构,输出的RF信号相位延迟90°。当光纤长为2km,电增益环腔长为0.5 m时,得到频率为10.8GHz、边模抑制比大于50dB和相位噪声为-104.8dBc/Hz@10kHz的RF信号。
A kind of optoelectronic oscillator(OEO)based on the structure of the Faraday rotator mirror is demonstrated in order to realize a novel optoelectronic oscillator whose phase can be turned.An electrical amplifier and an electrical delay line construct the electrical gain ring resonator,and the OEO loop consists of the electrical gain ring resonator cavity,the directly modulated distributed feedback(DFB)laser diode and the photodetector.The modulated optical signal generated by the structure of OEO is injected into the structure of optical circulator and Faraday rotator mirror,and the phase delay could be changed from 90°to 360°with different numbers of the Faraday rotator mirror.With the single structure,the phase of OEO signal can be changed.In the experiment,the length of fiber is 2km and the length of electrical loop is 0.5m,the structure achieves 10.8GHz fundamental oscillation with more than 50 dB side mode suppression ratio,and the phase noise of the OEO signal is-104.8dBc/Hz at 10 kHz.
A kind of optoelectronic oscillator(OEO)based on the structure of the Faraday rotator mirror is demonstrated in order to realize a novel optoelectronic oscillator whose phase can be turned.An electrical amplifier and an electrical delay line construct the electrical gain ring resonator,and the OEO loop consists of the electrical gain ring resonator cavity,the directly modulated distributed feedback(DFB)laser diode and the photodetector.The modulated optical signal generated by the structure of OEO is injected into the structure of optical circulator and Faraday rotator mirror,and the phase delay could be changed from 90°to 360°with different numbers of the Faraday rotator mirror.With the single structure,the phase of OEO signal can be changed.In the experiment,the length of fiber is 2km and the length of electrical loop is 0.5m,the structure achieves 10.8GHz fundamental oscillation with more than 50 dB side mode suppression ratio,and the phase noise of the OEO signal is-104.8dBc/Hz at 10 kHz.
引文
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[3]Zou X,Li M,Pan W,et al.Optical length change measurement via RF frequency shift analysis of incoherent light source based optoelectronic oscillator[J].Optics Express,2014,22(9):11129-11139.
[4]Wang Q,Huo L,Xing Y,et al.Gaussian-like dual-wavelength prescaled clock recovery with simultaneous frequency-doubled clock recovery using an optoelectronic oscillator[J].Optics express,2014,22(3):2798-2806.
[5]Tang Z,Zhang F,Pan S.Photonic microwave downconverter based on an optoelectronic oscillator using a single dual-drive Mach-Zehnder modulator[J].Optics Express,2014,22(1):305-310.
[6]Yang B,Jin X,Chen Y,et al.A tunable optoelectronic oscillator based on a dispersion-induced microwave photonic filter[J].IEEE Photonics Technology Letters,2013,25(10):921-924.
[7]Xiong J,Wang R,Fang T,et al.Low-cost and wideband frequency tunable optoelectronic oscillator based on a directly modulated distributed feedback semiconductor laser[J].Optics Letters,2013,38(20):4128-4130.
[8]Yao X S,Maleki L.Optoelectronic microwave oscillator[J].J.Opt.Soc.Am.B,1996,13(8):1725-1735.
[9]Yao X S,Maleki L.Multiloop optoelectronic oscillator[J].IEEE Journal of Quantum Electronics,2000,36(1):79-84.
[10]TENG Yi-chao,WANG De-shuang,ZHANG Bao-fu,et al.The high frequency stability and low phase noise optoelectronic oscillator based on electric injection-locked of Rb atomic frequency standard[J].Journal of Optoelectronics·Laser,2013,24(12):2278-2282.滕义超,王德双,张宝富,等.基于Rb原子频标电注入锁定的高频稳低相噪光电振荡器[J].光电子·激光,2013,24(12):2278-2282.
[11]WEI Zhihu,WANG Rong,FANG Tao,et al.A tunable optoelectronic oscillator based on tunable true phase shift[J].Journal of Optoelectronics·Laser,2013,24(3):429-433.魏志虎,王荣,方涛,等.基于可调谐真相移的可调谐光电振荡器[J].光电子·激光,2013,24(3):429-433.
[12]WEI Zhi-hu,WANG Rong,FANG Tao,et al.A tunable optoelectronic oscillator based on the non-linear dispersion compensation fiber Bragg grating[J].Journal of Optoelectronics·Laser,2012,23(9):1649-1653.魏志虎,王荣,方涛,等.基于非线性色散补偿光栅的可调谐光电振荡器[J].光电子·激光,2012,23(9):1649-1653.
[13]LI Wang-zhe,YAO Jian-ping.An optically tunable frequency multiplying optoelectronic oscillator[J].IEEE Photonics Tech.Letters,2012,24(10):812-814.
[14]GAO Liang,WANG Mu-guang,CHEN Xiang-fei,et al.Frequency-and phase-tunable optoelectronic oscillator[J]IEEE Photonics Tech.Letters,2013,25(11):1011-1013.
[15]TENG Yi-chao,ZHANG Bao-fu,WU Chuan-xin,et al.Precise tunable optoelectronic oscillator based on electrical gain ring resonator cavity[J].Journal of Optoelectronics·Laser,2014,25(11):2074-2078.滕义超,张宝富,吴传信,等.精细调谐电增益环腔光电振荡器[J].光电子·激光,2014,25(011):2074-2078.
[16]SUN Jian-hu,MA Teng-yun,WANG Xiao-bo,et al.Polarization compensation characteristics of the single photons transmission with faraday rotator mirror[J].Acta photonica sinica,2009,38(3):528-531.孙建虎,马腾云,王晓波,等.法拉第旋转镜用于补偿单光子偏振漂移的实验研究[J].光子学报,2009,38(3):528-531.