Power partition fluctuations in two-mode-degenerate distributed-feedback lasers

Author

Liou, K.Y. ; Ohtsu, M. ; Burrus, C.A. ; Koren, U. ; Koch, T.L.

Author_Institution

AT&T Bell Lab., Holmdel, NJ, USA

Volume

7

Issue

4

fYear

1989

fDate

4/1/1989 12:00:00 AM

Firstpage

632

Lastpage

639

Abstract

Measurements are presented along with a theoretical analysis of power partition fluctuations in a distributed feedback (DFB) laser operating in continuous wave with the two DFB degenerate modes as the only significant longitudinal modes. The power ratio of the two modes was varied from 1.1 to 2500:1 by electrical control using a two-electrode DFB laser. The laser was observed to exhibit (1) transient power dropouts and (2) two-mode relaxation oscillation. The dropout depths were less than 30% of the main-mode power in all cases, except when the laser was subjected to external optical feedback. The relaxation oscillations of the two-mode power are anticorrelated, which is different from the relaxation oscillation of the total power due to photon-carrier interaction. The calculated result based on a Fokker-Planck analysis agrees with the experiment, except for the two-mode relaxation oscillation, which was not considered in the theory.<>

Keywords

distributed feedback lasers; feedback; laser modes; laser theory; DFB degenerate modes; Fokker-Planck analysis; optical feedback; photon-carrier interaction; power partition fluctuations; relaxation oscillation; transient power dropouts; two-electrode DFB laser; two-mode-degenerate distributed-feedback lasers; Distributed feedback devices; Fiber lasers; Fluctuations; Laser feedback; Laser modes; Laser stability; Laser theory; Optical control; Power lasers; Power measurement;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.19089

Filename

19089