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

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...

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Bibliographic Details
Published in:Journal of lightwave technology 2002-03, Vol.20 (3), p.515-518
Main Authors: Ferrari, A., Ghislotti, G., Balsamo, S., Spano, V., Trezzi, F.
Format: Article
Language:English
Subjects:
Bragg gratings
Coherence
Emittance
Exact sciences and technology
Fiber gratings
Fiber lasers
Fluctuation
Fluctuations
Fundamental areas of phenomenology (including applications)
Gain
Laser excitation
Laser modes
Laser noise
Laser theory
Lasers
Nonlinearity
Optics
Oscillations
Physics
Pump lasers
Pumps
Semiconductor lasers
laser diodes
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Summary: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.
ISSN:0733-8724
1558-2213
DOI:10.1109/50.989002