Abstract.
Suppression of Q-switching during mode locking is extremely important for the successful development of continuous-wave mode-locked solid-state and fiber lasers. In this paper we show that the use of inverse saturable absorption, such as two-photon absorption and free carrier absorption, can suppress Q-switching instabilities and expand the continuous-wave operating regime in solid-state and fiber lasers. Conversely, an excess of inverse saturable absorption may lead to pulse-energy limiting and induce a break-up into multiple pulses. To analyze the advantages and limitations of adding this nonlinearity, we derive and discuss the mode-locking stability criteria in the presence of inverse saturable absorption. Useful asymptotic formulas for the absorber design employing inverse saturable absorption are also derived.
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Received: 13 October 1999 / Revised version: 15 March 2000 / Published online: 24 May 2000
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Schibli, T., Thoen, E., Kärtner, F. et al. Suppression of Q-switched mode locking and break-up into multiple pulses by inverse saturable absorption . Appl Phys B 70 (Suppl 1), S41–S49 (2000). https://doi.org/10.1007/s003400000331
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DOI: https://doi.org/10.1007/s003400000331