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

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5 Author(s)
Ferrari, A. ; Corning Opt. Technol. Italia, Milan, Italy ; Ghislotti, G. ; Balsamo, S. ; Spano, V.
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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

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Lightwave Technology, Journal of  (Volume:20 ,  Issue: 3 )