Evaluation of Slow Light Periodic Signals Considering the Distortion in EDF  

作　　者：WANG WU Chong-Qing WANG Zhi LIU Guo-Dong LIU Lan-Lan SUN Zhen-Chao 

机构地区：[1]Institute of Optical Information and Key Lab of Luminescence and Optical Information Technology, Beijing Jiaotong University, Beijing 100044

出　　处：《Chinese Physics Letters》2014年第3期82-85,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 61275075 and 61077048, the Natural Science Foundation of Beijing under Grant No 4112042, and the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No 20120009110032.

摘　　要：Based on the fundamental harmonic phase delay, a new definition of fundamental harmonic fractional delay （FHFD） is proposed to evaluate slow light with the consideration of signal distortion, to eliminate the dependence on the choice of the reference point. By solving the rate equation of erbium-doped fiber （EDF）, it is shown that the slow light always accompanies the signal distortion when the periodic signal propagates in EDF, and FHFD depends on the signal distortion, as well as the average input power, the modulation depth and the length of EDF. The results of simulations and experiments indicate that the definition of FHFD is reasonable and effective to evaluate the slow light of periodic signals.Based on the fundamental harmonic phase delay, a new definition of fundamental harmonic fractional delay （FHFD） is proposed to evaluate slow light with the consideration of signal distortion, to eliminate the dependence on the choice of the reference point. By solving the rate equation of erbium-doped fiber （EDF）, it is shown that the slow light always accompanies the signal distortion when the periodic signal propagates in EDF, and FHFD depends on the signal distortion, as well as the average input power, the modulation depth and the length of EDF. The results of simulations and experiments indicate that the definition of FHFD is reasonable and effective to evaluate the slow light of periodic signals.

分 类 号：TN943.6[电子电信—信号与信息处理] Q11[电子电信—信息与通信工程]