Diversity of photonic differentiators based on flexible demodulation of phase signals  

作　　者：郑傲凌 董建绩 雷蕾 杨婷 张新亮 

机构地区：[1]Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering,Huazhong University of Science and Technology

出　　处：《Chinese Physics B》2014年第3期212-218,共7页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2011CB301704);the Program for New Century Excellent Talents in Universities of China(Grant No.NCET-11-0168);the Foundation for the Author of National Excellent Doctoral Dissertation of China(Grant No.201139);the National Natural Science Foundation of China(Grant Nos.60901006 and 11174096)

摘　　要：We theoretically propose a multifunctional photonic differentiation （DIFF） scheme based on phase demodulation using two cascaded linear filters. The photonic D1FF has a diversity of output forms, such as the 1 st order intensity DIFF, the 1 st order field DIFF and its inversion, and the 2nd-order field DIFF, depending on the relative shift between the optical carrier and the filter＇s resonant notches. As a proof, we also experimentally demonstrate the DIFF diversity using a phase modulator and two delay interferometers （Dis）. The calculated average deviation is less than 7% for all DIFF waveforms. Our schemes show the advantages of flexible DIFF functions and forms, which may have different optical applications. For example, high order field differentiators can be used to generate complex temporal waveforms, and intensity differentiators are useful for the ultra-wideband pulse generation.We theoretically propose a multifunctional photonic differentiation （DIFF） scheme based on phase demodulation using two cascaded linear filters. The photonic D1FF has a diversity of output forms, such as the 1 st order intensity DIFF, the 1 st order field DIFF and its inversion, and the 2nd-order field DIFF, depending on the relative shift between the optical carrier and the filter＇s resonant notches. As a proof, we also experimentally demonstrate the DIFF diversity using a phase modulator and two delay interferometers （Dis）. The calculated average deviation is less than 7% for all DIFF waveforms. Our schemes show the advantages of flexible DIFF functions and forms, which may have different optical applications. For example, high order field differentiators can be used to generate complex temporal waveforms, and intensity differentiators are useful for the ultra-wideband pulse generation.

关 键 词：photonic differentiator pulse shaping microwave photonics 

分 类 号：TN911.7[电子电信—通信与信息系统]