[1] Poulin M, Ayotte S, Costin F et al. Optically phase-locked lasers for RF photonics applications[C]. Optical Fiber Communications Conference and Exhibition, Tu3F, 1(2015).
[6] Lu M Z, Park H C, Bloch E et al. An integrated heterodyne optical phase-locked loop with record offset locking frequency[C]. Optical Fiber Communications Conference and Exhibition, Tu2H, 4(2014).
[10] Ohtsu M. Highly coherent semiconductor lasers[M]. Boston: Artech House Publishers(1991).