Tunable DFB Laser Array Integrated With Mach–Zehnder Modulators for 44.6 Gb/s DQPSK Transmitter

Author

Sasahata, Y. ; Saito, Takashi ; Takiguchi, Tetsuya ; Takagi, Kazuyoshi ; Matsumoto, Kaname ; Nagira, T. ; Sakuma, H. ; Suzuki, Daisuke ; Makita, R. ; Takabayashi, M. ; Gotoda, M. ; Ishimura, E.

Author_Institution

High Freq. & Opt. Device Works, Mitsubishi Electr. Corp., Itami, Japan

Volume

19

Issue

4

fYear

2013

fDate

July-Aug. 2013

Firstpage

1501507

Lastpage

1501507

Abstract

A tunable distributed feedback (DFB) laser array integrated with Mach-Zehnder modulators (TLA-MZMs) for a 44.6 Gb/s differential quadrature phase shift keying (DQPSK) transmitter has been developed. The TLA-MZMs covers 98 wavelength channels with the 50 GHz ITU-T grid in the L-band. The side-mode suppression ratio for all channels was over 47 dB. DC extinction ratios over 25 dB were achieved for the MZMs. Our design achieves both the low modulation voltage (2 V_π) less than 3 V_pp and the low-excess loss less than 1 dB. 44.6 Gb/s DQPSK modulation with a low driving voltage of 3 V was successfully demonstrated.

Keywords

Mach-Zehnder interferometers; distributed feedback lasers; quadrature phase shift keying; radio transmitters; DFB laser array; DQPSK modulation; DQPSK transmitter; ITU-T grid; L-band; Mach-Zehnder modulators; bit rate 44.6 Gbit/s; differential quadrature phase shift keying; frequency 50 GHz; modulation voltage; side-mode suppression ratio; tunable distributed feedback laser array; voltage 3 V; wavelength channels; Arrays; Distributed feedback devices; Optical transmitters; Optical waveguides; Phase modulation; Semiconductor optical amplifiers; Distributed feedback (DFB) lasers; optical fiber communication; optical modulation; optical transmitters; semiconductor lasers;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/JSTQE.2013.2241737

Filename

6471176