High-performance phase locking of wide linewidth semiconductor lasers by combined use of optical injection locking and optical phase-lock loop
High-performance phase locking of wide linewidth semiconductor lasers by combined use of optical injection locking and optical phase-lock loop
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DOI：
10.1109/50.744252
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发表时间：
1999-02-01
影响因子：
4.7
通讯作者：
Seeds, AJ
中科院分区：
文献类型：
--
作者：
Bordonalli, AC;Walton, C;Seeds, AJ
窄线宽激光器或短环传输延迟的要求使得利用半导体激光器实现光学锁相环变得困难。尽管光学注入锁定可以为宽线宽激光器提供较低的相位误差方差，但其锁定范围受到稳定性考虑的限制。报道了一种结合了这两种技术以克服这些限制的系统--光学注入锁相环(OIPLL)的理论和实验结果。在线宽36 MHz、环路传输延迟15 ns、注入比小于-30分贝的DFB激光器的零差OIPLL系统中，获得了低至0.006 rad(2)(500 MHz带宽)的相位误差方差值和超过26 GHz的锁定范围，在100 MHz带宽内，相位误差方差低至0.003 rad(2)，平均周跳时间为3×10(10)S，单边带噪声密度为-94 dBc/hz。
The requirement for narrow linewidth lasers or short-loop propagation delay makes the realization of optical phase-lock loops using semiconductor lasers difficult. Although optical injection locking can provide low phase error variance for wide linewidth lasers, the locking range is restricted by stability considerations. Theoretical and experimental results for a system which combines both techniques so as to overcome these limitations, the optical injection phase-lock loop (OIPLL), are reported. Phase error variance values as low as 0.006 rad(2) (500 MHz bandwidth) and locking ranges exceeding 26 GHz were achieved in homodyne OIPLL systems using DFB lasers of summed linewidth 36 MHz, loop propagation delay of 15 ns and injection ratio less than -30 dB, Phase error variance values as low as 0.003 rad(2) in a bandwidth of 100 MHz, a mean time to cycle slip of 3 x 10(10) s and SSB noise density of -94 dBc/Hz at 10 kHz offset mere obtained for the same lasers in an heterodyne OIPLL configuration with loop propagation delay of 20 ns and injection ratio of -30 dB.