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分析了基于平行排列3×3耦合器的双环结构全光缓存器的原理,提出了4种全光缓存器的读写方法:正相光脉冲控制法,反相光脉冲控制法,正相电脉冲控制法和反相电脉冲控制法,介绍了0.89π相移的调节方法,构建了一个环长63 m的光缓存器的实验系统,实验不仅验证了4种读写方法,而且结果表明,当缓存圈数超过20圈时,反相光脉冲控制法是唯一可行的方法,实验还发现使用光脉冲控制法时,为了抑制噪声需要提高控制激光器的偏置电流,使控制光的直流分量在500μW~1 mW之间,或者注入不同于信号光和控制光的直流光。使用电脉冲控制法时,也必须注入直流光来抑制噪声。
The principle of all-optical buffer with double-ring structure based on parallel arrangement of 3 × 3 couplers is analyzed. Four read-write methods of all-optical buffer are proposed: normal-phase pulse control method, reverse-phase pulse control method, Pulse control method and reverse pulse control method, a method of adjusting the phase shift of 0.89π is introduced and an experimental system of optical buffer with a ring length of 63 m is constructed. The experiment not only verifies the four reading and writing methods, When the number of laps is more than 20 laps, the reverse-phase optical pulse control method is the only feasible method. Experiments also find that when using the optical pulse control method, in order to suppress the noise, it is necessary to increase the bias current of the control laser so that the direct- 500μW ~ 1 mW, or different from the signal light and control the injection of direct light. When using the electric pulse control method, you must also inject DC light to suppress noise.