Flattened optical frequency-locked multi-carrier generation by cascading one directly modulated laser and one phase modulator  

作　　者：余建国 李欣颖 余建军 迟楠 

机构地区：[1]Department of Electrical Engineering,Beijing University of Posts and Telecommunications [2]Department of Communication Science and Engineering,Fudan University

出　　处：《Chinese Optics Letters》2013年第11期33-37,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61107064,61177071,60837004,and 61250018);the National High Technology Research and Development Program of China(Nos.2011AA010302 and 2012AA011302);the National Key Technology R&D Program of China(No.2012BAH18B00);the International CoorperationProgram of Shanghai Scvence and Technology AssoCiation(No.12510705600)

摘　　要：We propose a novel scheme for optical frequency-locked multi-carrier generation based on a directly modu- lated laser （DML） and a phase modulator （PM） in cascade through synchronous sinusoidal radio frequency （RF） signal. The optimal operating zone for the cascaded DML and PM scheme is determined via theoreti- cal analysis and numerical simulation. We demonstrate 16 optical subcarriers can be successfully generated based on the cascaded DML and PM scheme in the optimal zone. The generated 16 optical subcarries have frequency spacing of 12.5 GHz and power difference of less than 3 dB. These results agree well with those of the numerical simulation. We also demonstrate intensity modulation and direct detection （IM-DD） based on one of the 16 generated optical subcarriers. After 20-km single-mode fiber-28 （SMF-28） transmission, the bit-error ratio （BER） of 1×10^-9 can be attained for both 3.125- and 12.5-Gb/s bit rates.We propose a novel scheme for optical frequency-locked multi-carrier generation based on a directly modu- lated laser （DML） and a phase modulator （PM） in cascade through synchronous sinusoidal radio frequency （RF） signal. The optimal operating zone for the cascaded DML and PM scheme is determined via theoreti- cal analysis and numerical simulation. We demonstrate 16 optical subcarriers can be successfully generated based on the cascaded DML and PM scheme in the optimal zone. The generated 16 optical subcarries have frequency spacing of 12.5 GHz and power difference of less than 3 dB. These results agree well with those of the numerical simulation. We also demonstrate intensity modulation and direct detection （IM-DD） based on one of the 16 generated optical subcarriers. After 20-km single-mode fiber-28 （SMF-28） transmission, the bit-error ratio （BER） of 1×10^-9 can be attained for both 3.125- and 12.5-Gb/s bit rates.

关 键 词：Computer simulation Locks (fasteners) Natural frequencies Numerical models Optical materials Optimization Single mode fibers 

分 类 号：TN248[电子电信—物理电子学]