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半导体光放大器(SOA)因其具有良好的光-光互作用特性,包括交叉增益调制、交叉相位调制、交叉偏振调制以及四波混频等,在全光信号处理技术中已经获得了广泛的应用。利用SOA与光纤反馈可构成环形腔激光器S-FRL。在S-FRL中将SOA的光-光互作用特性与反馈条件相结合,可以改变S-FRL的起振、抑制、选频等多种状态,从而构成不同功能的全光信号处理器件。在分析S-FRL激光振荡原理的基础上,提出了双环耦合的S-FRL,并以此为基础构成一种双环耦合的双稳态触发器,进而构成一种同步脉冲展宽器;还提出了一种级联的S-FRL,由此构成一种基于负逻辑的全光判决器。
Semiconductor optical amplifiers (SOA) have gained wide applications in all-optical signal processing because of their good optical-optical interaction characteristics, including cross gain modulation, cross-phase modulation, cross-polarization modulation and four-wave mixing . The ring cavity laser S-FRL can be constructed by using SOA and fiber feedback. In S-FRL, combining the light-optical interaction and feedback conditions of SOA can change various states of S-FRL such as start-up, suppression, frequency selection and so on, and thus constitute all-optical signal processing devices with different functions. Based on the analysis of the principle of S-FRL laser oscillation, a two-ring coupled S-FRL is proposed and based on which a bistable flip-flop with double loop coupling is constructed to form a synchronous pulse stretcher. A cascaded S-FRL, thus forming a negative logic based all-optical arbiter.