Open AccessLow-loss high-speed silicon IQ modulator for QPSK/DQPSK in C and L bands
Author(s) -
Kazuhiro Goi,
Akira Oka,
Hiroyuki Kusaka,
Yoshihiro Terada,
Kensuke Ogawa,
Tsung-Yang Liow,
Xiaoguang Tu,
GuoQiang Lo,
DimLee Kwong
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.010703
Subject(s) - phase shift keying , optics , quadrature amplitude modulation , keying , bit error rate , materials science , phase noise , physics , phase modulation , telecommunications , computer science , channel (broadcasting)
A low-loss high-speed silicon in-phase (I) quadrature (Q) modulator is designed, fabricated and characterized. The fabricated IQ modulator has a low passive optical loss of 9 dB in C and L bands. Using the modulator, differential quadrature phase-shift keying (DQPSK) transmission at 44.6 Gb/s with differential detection is confirmed with an optical signal-to-noise ratio (OSNR) of 16.3 dB for a bit error rate (BER) of 10(-3) and a dispersion tolerance of -96 to 107 ps/nm. Moreover, in digital coherent detection, quadrature phase-shift keying (QPSK) up to 64 Gb/s are achieved with an OSNR of 11.6-11.8 dB for a BER of 10(-2) at 1530, 1550, and 1610 nm.