A WIDE-BAND HETERODYNE OPTICAL PHASE-LOCKED LOOP FOR GENERATION OF 3-18 GHZ MICROWAVE CARRIERS
A WIDE-BAND HETERODYNE OPTICAL PHASE-LOCKED LOOP FOR GENERATION OF 3-18 GHZ MICROWAVE CARRIERS
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DOI：
10.1109/68.149915
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发表时间：
1992-08-01
影响因子：
2.6
通讯作者：
BROBERG, B
中科院分区：
文献类型：
--
作者：
GLIESE, U;NIELSEN, TN;BROBERG, B
本文介绍了用1.5 μ m半导体激光器构成的宽带外差二阶光锁相环的实验结果。该环路的带宽为180 MHz，增益为181 dBHz，传播延迟仅为400 ps。8 MHz线宽的拍频信号被锁相，以成为接近于具有-125dBc/ Hz的噪声水平的载波的微波参考源的复制品。锁定载波的总相位方差为0.04 rad 2，并且可以在3至18 GHz的连续范围内产生载波。环路的可靠性非常好，平均周跳时间为10（11）s，采集范围为640 MHz。
Experimental results of a wideband heterodyne second-order optical phase-locked loop with 1.5-mu-m semiconductor lasers are presented. The loop has a bandwidth of 180 MHz, a gain of 181 dBHz, and a propagation delay of only 400 ps. A beat signal of 8 MHz linewidth is phase locked to become a replica of a microwave reference source close to carrier with a noise level of -125 dBc / Hz. The total phase variance of the locked carrier is 0.04 rad2 and carriers can be generated in a continuous range from 3 to 18 GHz. The loop reliability is excellent with an average time to cycle slip of 10(11) s and an acquisition range of 640 MHz.