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Absolute instabilities in lasers with host-induced nonlinearities and dispersion

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2 Author(s)
van Tartwijk, G.H.M. ; Inst. of Opt., Rochester Univ., NY, USA ; Agrawal, G.P.

We analyze the occurrence of absolute instabilities in lasers that contain a dispersive host material with third-order nonlinearities. Starting from the Maxwell-Bloch equations, we derive general multimode equations to distinguish between convective and absolute instabilities. We find that both self-phase modulation and intensity-dependent absorption can dramatically affect the absolute stability of such lasers. In particular, the self-pulsing threshold (the so-called second laser threshold) can occur at few times the first laser threshold even in good-cavity lasers for which no self-pulsing occurs in the absence of intensity-dependent absorption

Published in:

Quantum Electronics, IEEE Journal of  (Volume:34 ,  Issue: 10 )