Silica Waveguide DQPSK Demodulator With Wide Operation Range Enhanced by Using Stress Release Grooves

Author

Sakamaki, Yohei ; Nasu, Yusuke ; Hashimoto, Toshikazu ; Hattori, Kuninori ; Inoue, Yasuyuki ; Takahashi, Hiroshi

Author_Institution

NTT Photonics Labs., NTT Corp., Atsugi, Japan

Volume

21

Issue

13

fYear

2009

fDate

7/1/2009 12:00:00 AM

Firstpage

938

Lastpage

940

Abstract

A 43-Gb/s differential quadrature phase-shift keying demodulator is demonstrated with a wide operation range enhanced by birefringence control achieved by using stress release grooves. The fabricated demodulator realizes a sufficiently low polarization-dependent frequency shift of less than 150 MHz over the C- and L-bands. In addition, we report an experimental result showing the reduction in the power consumption of a thermooptic effect-based phase shifter achieved by introducing the grooves.

Keywords

birefringence; demodulators; differential phase shift keying; optical fibre communication; optical fibre polarisation; optical phase shifters; quadrature phase shift keying; silicon compounds; telecommunication control; thermo-optical effects; DQPSK demodulator fabrication; SiO₂; birefringence control; bit rate 43 Gbit/s; differential quadrature phase-shift keying; polarization-dependent frequency shift; silica waveguide; thermooptic effect-based phase shifter; Differential quadrature phase-shift keying (DQPSK); Mach–Zehnder interferometer (MZI); optical planar waveguides;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2020807

Filename

4838826