Narrow linewidth and wavelength tunable distributed feedback lasers

Author

Kotaki, Y. ; Ishikawa, Hiroshi

Author_Institution

Fujitsu Labs. Ltd., Atsugi, Japan

fYear

1990

fDate

23-25 April 1990

Firstpage

185

Lastpage

188

Abstract

Results obtained for an experimental three-section multiple-quantum-well distributed-feedback (DFB) laser with a long cavity and a lambda /4 phase-shifted grating are reviewed. To narrow the linewidth, a 1.2-mm-long cavity, Bragg wavelength detuning of -20 nm from gain peak, and a quantum-well active layer were used. Wavelength tuning was achieved by controlling spatial hole burning using three electrodes with nonuniform current injection. The maximum wavelength tuning range was 1.6 nm, the minimum linewidth was 350 kHz, and FM response was flat from 100 kHz to 10 GHz, making the laser suitable for use in coherent optical fiber transmission systems.<>

Keywords

distributed feedback lasers; frequency response; laser tuning; optical communication equipment; optical hole burning; semiconductor junction lasers; 1.2 mm; 100 kHz to 10 GHz; Bragg wavelength detuning; FM response; InP substrate; coherent optical fiber transmission systems; current injection; distributed feedback laser; multiple quantum well DFB laser; narrow linewidth laser; phase-shifted grating; quantum-well active layer; spatial hole burning; wavelength tunable distributed feedback lasers; Distributed feedback devices; Electrodes; Fiber lasers; Gratings; Laser feedback; Laser tuning; Optical tuning; Quantum well devices; Quantum well lasers; Tunable circuits and devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Indium Phosphide and Related Materials, 1990. Second International Conference.

Conference_Location

Denver, CO, USA

Type

conf

DOI

10.1109/ICIPRM.1990.203013

Filename

203013