Title :
A Phase Stable Short Pulses Generator Using an EAM and Phase Modulators for Application in 160-GBaud DQPSK Systems
Author :
Ji, Yu ; Li, Y. ; Wu, J. ; Zhang, F.Z. ; Xu, K. ; Li, W. ; Hong, X.B. ; Lin, J.T.
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
We demonstrate 40-GHz phase stable short optical pulses generation using an electroabsorption modulator and cascaded phase modulators. The pulses are characterized with a small pedestal, ~2.1-ps pulsewidth, an extinction ratio larger than 23 dB, timing jitter less than 60 fs, and an optical signal-to-noise ratio over 40 dB over 30-nm tuning range. The high quality and phase stability of the pulses are further experimentally verified in a 4 × 40 GBaud differential quadrature phase-shift-keying (DQPSK) optical-time-division-multiplexing (OTDM) system.
Keywords :
differential phase shift keying; electro-optical modulation; electroabsorption; extinction coefficients; laser stability; laser tuning; optical pulse generation; phase modulation; quadrature phase shift keying; time division multiplexing; timing jitter; DQPSK systems; OTDM system; cascaded phase modulators; differential quadrature phase-shift-keying; electroabsorption modulator; extinction ratio; frequency 40 GHz; optical signal-to-noise ratio; optical-time-division-multiplexing system; phase stability; phase stable short pulse generator; timing jitter; wavelength 30 nm; Adaptive optics; Differential phase shift keying; Optical fibers; Optical noise; Optical pulses; Phase modulation; Phase shift keying; Quadrature phase shift keying; Differential quadrature phase-shift keying (DQPSK); electroabsorption modulator (EAM); phase modulator (PM); phase stability; short pulses;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2172406
