A control loop which ensures high side-mode-suppression ratio in a tunable DBR laser

Author

Woodward, S.L. ; Koch, T.L. ; Koren, U.

Author_Institution

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

Volume

4

Issue

5

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

417

Lastpage

419

Abstract

The authors present a control loop which ensures single-mode operation of a tunable distributed-Bragg-reflector (DBR) laser. This control loop uses no external optics. The error signal is derived from an integrated detector which measures the light transmitted through the Bragg section. Using this signal to control the current to the Bragg section, the laser is tuned to where the side-mode-suppression ratio is high. This guarantees that the laser remains single-mode, even when modulated. This servo is capable of application in wavelength-division-multiplexed (WDM) systems.<>

Keywords

distributed Bragg reflector lasers; frequency division multiplexing; laser modes; laser tuning; multiplexing equipment; semiconductor junction lasers; Bragg section; WDM; control loop; diode lasers; distributed-Bragg-reflector; error signal; high side-mode-suppression ratio; integrated detector; servo; single-mode operation; transmitted light measurement; tunable DBR laser; wavelength-division-multiplexed; Distributed Bragg reflectors; Gratings; Laser modes; Laser tuning; Optical control; Power generation; Power lasers; Reflectivity; Tunable circuits and devices; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.136471

Filename

136471