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提出并分析验证了一种基于半导体激光器注入锁定实现的全光时钟提取方案。方案中,借助半导体激光器的注入锁定过程,可以将光归零(RZ)码信号中的载波和一个时钟分量依次锁定两个半导体激光器获得光场的锁相输出,通过输出分量的叠加,得到所需的同步时钟信号。实验中,采用两个分布反馈(DFB)型半导体激光器,成功地获得了10 Gb/s光RZ码信号的时钟信号。这一方案在注入功率的动态范围、可调谐性、信号波长稳定性要求等方面都表现出了很好的灵活性,并具有可集成潜力,是一种实用性很强的新方法。
An all-optical clock extraction scheme based on semiconductor laser injection locking is proposed and analyzed. In the scheme, by injecting and locking the semiconductor laser, a carrier and a clock component in the RZ code signal can be sequentially locked to two semiconductor lasers to obtain a phase-locked output of the light field. Through the superposition of the output components, Required synchronous clock signal. In the experiment, two distributed feedback (DFB) type semiconductor lasers were used to successfully obtain the clock signal of 10 Gb / s optical RZ code signal. This scheme shows great flexibility in terms of the dynamic range of injection power, tunability and signal wavelength stability requirements, and has potential for integration. It is a highly practical and practical new method.