40 Gb/s NRZ-DQPSK data wavelength conversion with amplitude regeneration using four-wave mixing in a quantum dash semiconductor optical amplifier

Michael J. Connelly , Lukasz Krzczanowicz , Pascal Morel (1) , Ammar Sharaiha (2, 1) , François Lelarge (3) , Romain Brenot (3) , Siddharth Joshi (4, 3, 5) , Sophie Barbet (3)

1 Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
2 Lab-STICC_UBO_MOM_DIM
3 III-V Lab - Alcatel-Thalès III-V lab
4 TSP - EPH - Département Electronique et Physique
5 LPN - Laboratoire de photonique et de nanostructures

Differential quadrature phase shift keying (DQPSK) modulation is attractive in high-speed optical communications because of its resistance to fiber nonlinearities and more efficient use of fiber bandwidth compared to conventional intensity modulation schemes. Because of its wavelength conversion ability and phase preservation, semiconductor optical amplifier (SOA) fourwave mixing (FWM) has attracted much attention. We experimentally study wavelength conversion of 40 Gbit/s (20 Gbaud) non-return-to-zero (NRZ)-DQPSK data using FWM in a quantum dash SOA with 20 dB gain and 5 dBm output saturation power. Q factor improvement and eye diagram reshaping is shown for up to 3 nm pump-probe detuning and is superior to that reported for a higher gain bulk SOA.

Mots clés: differential quadrature phase shift keying (DQPSK); phase modulation; quantum-dash; semiconductor optical amplifier (SOA); four-wave mixing (FWM); wavelength conversion

Domaines: Optique / photonique

Michael J. Connelly, Lukasz Krzczanowicz, Pascal Morel, Ammar Sharaiha, François Lelarge, et al.. 40 Gb/s NRZ-DQPSK data wavelength conversion with amplitude regeneration using four-wave mixing in a quantum dash semiconductor optical amplifier. Frontiers of Optoelectronics, 2016, 9 (3), pp.341-345. ⟨10.1007/s12200-016-0628-x⟩. ⟨hal-01455069⟩