Wavelength tuning characteristics of DFB lasers having twin-guide structures modulated by injection current or electric field

Author

Yamamoto, E. ; Hamada, M. ; Suda, K. ; Nogiwa, S. ; Oki, T.

Author_Institution

Opt. Meas. Technol. Dev. Co. Ltd., Tokyo, Japan

Volume

139

Issue

1

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

24

Lastpage

28

Abstract

The wavelength tuning and intensity modulation characteristics are presented for three types of twin-guide (TG) lasers entirely fabricated by metalorganic vapour phase epitaxy (MOVPE). A wide continuous tuning range of 5.3 nm is obtained for the tunable twin-guide (TTG) laser. The TTG lasers, however, have the drawbacks of output power reduction and spectral linewidth broadening during tuning. A new type of tunable laser, the complementary twin-active-guide (CTAG) laser, is proposed, and its tuning characteristics are presented for the first time. A wide continuous tuning range over 4 nm is obtained, although the thermal effect is more dominant than carrier effects. The CTAG structure enables suppression of the spectral linewidth broadening induced by the injected carrier recombination shot noise (IRSN) during tuning

Keywords

distributed feedback lasers; laser tuning; optical modulation; optical waveguides; semiconductor junction lasers; vapour phase epitaxial growth; carrier effects; complementary twin active guide laser; distributed feedback lasers; electric field; injected carrier recombination shot noise; injection current; intensity modulation characteristics; metalorganic vapour phase epitaxy; output power reduction; spectral linewidth broadening; thermal effect; tunable laser diode; twin-guide structures; wavelength tuning characteristics; wide continuous tuning range;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings J

Publisher

iet

ISSN

0267-3932

Type

jour

Filename

124247