摘要
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。
In this paper, we discussed the theory of the double loop optical buffer （DLOB） based on collinear 3 × 3 coupler, and put forward 4 types of read-write methods in DLOB： positive optical pulse control, negative optical pulse control, positive electrical pulse control and negative electrical pulse control. We also introduced 0. 89π-phase adjusting method. A double loop optical buffer experiment system had been built in which the loop was 63 meter length. The experiment had not only proved 4 types of read-write methods, but also demonstrated that the negative optical pulse control was the only doable method when the optical packets traversed in DLOB exceeding 20 roundtrips. In order to suppress the noise, we can enhance the bias current of the control light, the ＂base＂ power of the control light was required from 500 μW to 1 mW by the way of enhancing the bias current of the control laser, or injecting a direct light whose wavelength was different from the signal light and control light. In the electrical pulse control, it also needed injecting a direct light to suppress the noise.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2008年第12期1930-1934,共5页
Chinese Journal of Lasers
关键词
光通信
全光缓存器
控制技术
噪声抑制
optical communication
all optical buffer
control technique
suppressing noise
