Open AccessSingle silicon wire waveguide based delay line interferometer for DPSK demodulation
Author(s) -
Rai Kou,
Hidetaka Nishi,
Tai Tsuchizawa,
Hiroshi Fukuda,
Hiroyuki Satō,
Koji Yamada
Publication year - 2012
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.20.011037
Subject(s) - demodulation , optics , free spectral range , waveguide , interferometry , differential phase , extinction ratio , interference (communication) , keying , phase shift keying , materials science , group delay and phase delay , physics , bit error rate , bandwidth (computing) , telecommunications , computer science , wavelength , channel (broadcasting)
We experimentally demonstrate a high-quality phase shift keying demodulator based on a silicon photonic wire waveguide. Since the birefringence of the waveguide generates extremely huge differential group delay, an ultra-compact and high-extinction-ratio delay line interferometer is devised in TE and TM modes. We firstly calculated and simulated the requirements for propagation length and waveguide's dimensions. Then, we measured the interference spectrum, eye pattern, bit error rate, and temperature dependence to ascertain its feasibility for DPSK demodulation. For a 2.8 cm-long wire waveguide, a free spectral range of 9.6 GHz and an error-free DPSK demodulation around 10 Gb/s are obtained.