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...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.展开更多
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)+1 种基金the National Key Technology R&D Program of China(No.2012BAH18B00)the International CoorperationProgram of Shanghai Scvence and Technology AssoCiation(No.12510705600)
文摘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.
