Subkilohertz fluctuations and mode hopping in high-power grating-stabilized 980-nm pumps

Author

Ferrari, Alberto ; Ghislotti, Giorgio ; Balsamo, Stefano ; Spano, Vittorio ; Trezzi, Fiorenzo

Author_Institution

Corning Opt. Technol. Italia, Milan, Italy

Volume

20

Issue

3

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

515

Lastpage

518

Abstract

The behavior of fiber Bragg grating (FBG)-stabilized 980-nm pump lasers is experimentally and theoretically investigated. The subkilohertz noise in the emitted power is related to the coexistence and oscillation between coherence collapsed state and narrow linewidth single-mode (SM) operation. These findings are theoretically discussed by using a multimode time-domain model that accounts for spatial harmonics and includes nonlinear gain. One additional result is an indication that kinks in the L-I curve can be explained by nonlinear mode competition

Keywords

Bragg gratings; fluctuations; laser modes; laser transitions; optical communication equipment; optical fibre amplifiers; optical pumping; spectral line breadth; time-domain analysis; 980 nm; L-I curve; coherence collapsed state; emitted power; fiber Bragg grating stabilized pump lasers; high-power grating-stabilized 980-nm pumps; kinks; laser stability; mode hopping; multimode time-domain model; narrow linewidth single-mode operation; nonlinear gain; nonlinear mode competition; spatial harmonics; subkilohertz fluctuations; subkilohertz noise; Bragg gratings; Coherence; Fiber gratings; Fiber lasers; Fluctuations; Laser excitation; Laser modes; Laser noise; Laser theory; Pump lasers;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.989002

Filename

989002