Title :
A Novel Composite Method for Ultra-Wideband Doublet Pulses Generation
Author :
Chen, Hongwei ; Chen, Minghua ; Qiu, Ciyuan ; Xie, Shizhong
Author_Institution :
Tsinghua Univ., Beijing
Abstract :
A novel composite approach to generate ultra-wideband (UWB) doublet pulses in optical domain through an electrical Gaussian pulse is proposed and demonstrated in this letter. Two pulses with reversed polarity generated by polarization modulation are fed into a differential group delay device and a semiconductor optical amplifier (SOA) wherein the optical pulse profile is modified. Doublet pulses are obtained after optical-electrical detection due to gain saturation and recovery mechanism in the SOA. The fractional bandwidth of doublet pulses exceeds 180%, fulfilling the UWB requirements.
Keywords :
delay-differential systems; electro-optical effects; light polarisation; optical modulation; optical pulse generation; semiconductor optical amplifiers; ultra wideband communication; SOA; composite approach; differential group delay device; electrical Gaussian pulse; fractional bandwidth; gain saturation; optical pulse profile; optical-electrical detection; polarization modulation; recovery mechanism; semiconductor optical amplifier; ultra-wideband doublet pulses generation; Optical modulation; Optical pulse generation; Optical pulses; Optical saturation; Pulse amplifiers; Pulse generation; Pulse modulation; Semiconductor optical amplifiers; Stimulated emission; Ultra wideband technology; Doublet pulse; polarization modulation; semiconductor optical amplifier (SOA); ultra-wideband (UWB);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.908650
