1.5-μm strained-layer MQW-DFB lasers with high relaxation-oscillation frequency and low-chirp characteristics

Author

Otsuka, Nobuyuki ; Kito, Masanobu ; Ishino, Masato ; Matsui, Yasushi

Author_Institution

Semicond. Res. Center, Matsushita Electr. Ind. Co. Ltd., Moriguchi, Japan

Volume

32

Issue

7

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

1230

Lastpage

1236

Abstract

1.5-μm wavelength strained-layer multiple-quantum-well (SL-MQW) distributed-feedback (DFB) lasers for optical video distribution systems, including optical-fiber amplifiers, are studied with respect to the relaxation-oscillation frequency and wavelength chirp characteristics. Several types of lasers are examined as parameters of amount of strain, optical confinement, and detuning. It is confirmed that the introduction of negative detuning has an obvious effect on the increase in relaxation-oscillation frequency f_r and the reduction in chirp ΔF. The SL-MQW DFB lasers with low optical confinement and negative detuning show extremely low FM response ΔF/ΔI of less than 60 MHz/mA as well as high f_r over 10 GHz for the first time. Additionally, low-chirp value ΔF of 180 MHz with modulation depth of 10% is realized at relatively low bias current (I_h=I_th+30 mA)

Keywords

chirp modulation; deformation; distributed feedback lasers; electro-optical modulation; frequency modulation; infrared sources; laser theory; oscillations; quantum well lasers; semiconductor device models; μm strained-layer MQW-DFB lasers; 1.5 mum; SL-MQW DFB lasers; detuning; high relaxation-oscillation frequency; low FM response; low optical confinement; low-chirp characteristics; modulation depth; multiple-quantum-well distributed-feedback lasers; negative detuning; optical confinement; optical video distribution systems; optical-fiber amplifiers; relatively low bias current; wavelength chirp characteristics; Capacitive sensors; Chirp; Distributed amplifiers; Frequency; Optical amplifiers; Optical modulation; Quantum well devices; Semiconductor optical amplifiers; Stimulated emission; Ultraviolet sources;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.517023

Filename

517023