∝型平坦展宽频谱可调全光时延线  

∝-type tunable all-optical delay line on flat broadened spectrum

作　　者：曹继红[1] 陈伟[1] 

机构地区：[1]北京交通大学全光网络与现代通信网教育部重点实验室,北京100044

出　　处：《光学精密工程》2016年第8期1827-1833,共7页Optics and Precision Engineering

基　　金：国家973重点基础研究发展计划资助项目(No.2010CB328206)

摘　　要：根据全光网交换和高速时分复用技术对时延调节的需求,提出一种新的基于光纤非线性效应的∝型全光再生可调时延线。该时延线由小段高非线性光纤、色散补偿光纤、光纤光栅滤波器和光纤放大器等构成;利用自相位调制、小量群速度色散效应、以及光波分裂效应获得携带近似线性时延的平坦化展宽光谱,并在波长可调谐光纤光栅的配合下实现时延控制,同时具有对工作波长进行适当变换的功能。单皮秒脉冲演变数值分析显示其在10nm的波长范围内的调节量可达300ps以上,在40Gbps脉冲序列仿真传输实验中Q值可达23.6。仿真实验结果表明:设计的时延线在保证输出脉冲质量仍然良好(比特误差率(BER)10-12)的情况下获得了较大的时延调节量,能满足全光网和高速时分复用系统的需求。According to the requirements of all optical networks and high speed optical time division multiplex systems for the time delay adjustment, a novel tunable ∝-type delay line is proposed based on the optical fiber nonlinear effect. The delay line is consist of some all-fiber-type devices, such as special optical fibers, optical fiber gratings, and optical fiber amplifiers. On the self-phase modula- tion, group-velocity dispersion effect and the light splitting effect, the delay line obtains the flat broadened spectrum with an approximate linear time delay and implements the time delay control with the help of a tunable optical fiber grating. Moreover, it converts the operation wavelength in a certain range under the control. The numerical evolution results of single picosecond pulse indicate that the delay has been up to 300 ps in the wavelength range of 10 nm, and the maximum output Q value up to 23.6 in one 40 Gbps at the simulation experiment system. These experiment results show that the all- optical delay line gets better time delay properties under maintaining a good pulse output （Bit Error Ratio （BER）〈〈10-12） and satisfies the requirements of all optical networks and high speed optical time division multiplex systems.

关 键 词：全光时延线 可调时延线 光纤非线性效应 频谱展宽 色散 全光网交换 时分复用 

分 类 号：TN929.11[电子电信—通信与信息系统] TN915.05[电子电信—信息与通信工程]