| 基于再生锁模系统的低相噪微波源 |
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| 引用本文： | 苗旺,于晋龙,王菊,孙斌,孟天晖,王文睿,杨恩泽.基于再生锁模系统的低相噪微波源[J].光电子．激光,2012(9):1702-1707. |
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| 作者姓名： | 苗旺 于晋龙 王菊 孙斌 孟天晖 王文睿 杨恩泽 |
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| 作者单位： | 天津大学电子信息工程学院;天津大学电子信息工程学院;天津大学电子信息工程学院;天津大学电子信息工程学院;天津大学电子信息工程学院;天津大学电子信息工程学院;天津大学电子信息工程学院 |
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| 基金项目： | 国家重点基础研究发展规划(2010CB327603,2012CB315704)资助项目 |
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| 摘 要： | 采用再生锁模光纤激光器作为高质量微波源的振荡级,产生了高质量的微波信号。为了保证振荡环路的稳定性,采用了锁相技术和腔长控制;采用"单模光纤(SMF)+法拉第旋光镜(FRM)"的结构代替了全保偏光纤,在腔内存在偏振扰动的情况下保证了系统稳定并降低了系统成本;在光生微波环路中加入了半导体光放大器(SOA),有效地提高了边模抑制比。最后,获得了的相位噪声为-98dBc/Hz(@10kHz)、线宽小于5Hz的20GHz微波信号。在10h的观测时间内,频率漂移小于2Hz,频率长期稳定性优于1×10-10。
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| 关 键 词： | 微波源 再生锁模 腔长控制 半导体光放大器(SOA) 频率稳定性 |
Low phase noise microwave source based on regeneratively mode-locked system |
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| YU Jin-long.Low phase noise microwave source based on regeneratively mode-locked system[J].Journal of Optoelectronics·laser,2012(9):1702-1707. |
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| Authors: | YU Jin-long |
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| Affiliation: | School of Electronic and Information Engineering,Tianjin University,Tianjin,300072,China;School of Electronic and Information Engineering,Tianjin University,Tianjin,300072,China;School of Electronic and Information Engineering,Tianjin University,Tianjin,300072,China;School of Electronic and Information Engineering,Tianjin University,Tianjin,300072,China;School of Electronic and Information Engineering,Tianjin University,Tianjin,300072,China;School of Electronic and Information Engineering,Tianjin University,Tianjin,300072,China;School of Electronic and Information Engineering,Tianjin University,Tianjin,300072,China |
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| Abstract: | Optical pulse trains from mode-locked lasers carry low-jitter microwave signals.High-quality microwave signal could be obtained by using a band-pass filter.A regeneratively mode-locked fiber laser is used as an oscillation source to generate high-quality microwave signal.The phase-locked technology and cavity length control guarantee the stability of the system.The cost of the system is dramatically reduced by using the structure of "single-mode fiber+Farady rotator mirror" instead of polarization-maintaining structure.A semiconductor optical amplifier(SOA) is introduced into the optical microwave loop,which improves the side-mode suppression ratio effectively.The generated 20 GHz microwave signal has great performance with phase noise of-98 dBc/Hz at 10 kHz and line-width less than 5 Hz.The frequency stability is better than 1×10-10 within 10 h observation. |
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| Keywords: | microwave source regeneratively mode-locked fiber laser cavity length control semiconductor optical amplifier(SOA) frequency stability |
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