Tunable ultra-narrow linewidth microwave generation from a double-loop Brillouin fiber laser
Tunable ultra-narrow linewidth microwave generation from a double-loop Brillouin fiber laser
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DOI：
10.1088/1054-660x/24/10/105110
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发表时间：
2014-08
期刊：
影响因子：
1.2
通讯作者：
Peng Zhang;Tianshu Wang;Q. Jia;Wanzhuo Ma;Ke-yan Dong;Xiaotao Kang;Li-Zhu Zhang;S. Tong;Huilin Jiang
中科院分区：
文献类型：
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作者：
Peng Zhang;Tianshu Wang;Q. Jia;Wanzhuo Ma;Ke-yan Dong;Xiaotao Kang;Li-Zhu Zhang;S. Tong;Huilin Jiang
提出了一种产生超窄线宽微波信号的简单光子方法，并进行了实验验证。在该方案中，使用双回路非抽运保偏掺铒光纤的多波长布里渊光纤激光器（BFL）。双环配置包括一个50米长的单模光纤（SMF）和一个10米长的SMF作为布里渊增益。使用双回路可以提高微波源的阈值和线宽，同时使用4 m长的非抽运PM-EDF来抑制不需要的侧模。通过调节偏振控制器和布里渊泵浦的波长，将双波长光信号在高速光探测器外差产生微波信号。从而获得10.605 ~ 10.887 GHz的可调谐微波信号。微波信号的线宽约为14.4 kHz，侧模抑制比约为30 dB。
A simple photonic approach to generate an ultra-narrow linewidth microwave signal is proposed and experimentally demonstrated. In this scheme, a multi-wavelength Brillouin fiber laser (BFL) with a double-loop and un-pumped polarization maintaining erbium doped fiber (PM-EDF) is used. The double-loop configuration includes a 50 m long single-mode fiber (SMF) and a 10 m long SMF as Brillouin gain. The threshold and linewidth of the microwave source can be improved by using a double loop, while a 4 m long un-pumped PM-EDF is used to suppress unwanted side-modes. A dual-wavelength optical signal is heterodyned at the high-speed photo detector to produce a microwave signal by adjusting the polarization controller and the wavelength of the Brillouin pump. As a result, a tunable microwave signal from 10.605 to 10.887 GHz can be obtained. The linewidth of the microwave signal is about 14.4 kHz, and the side-mode suppression ratio is about 30 dB.