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Optics Letters

Pump interference and optical bistability effects in a Tm, Ho:YAG microlaser

V. Hartwell, H. Nakajima, Nicholas Djeu

Published Nov 1, 1995• 7 citations
Publisher

Abstract

Thermally induced bistability in a Tm, Ho:YAG microlaser has been observed. Theoretical results obtained from a simple plane-wave model are found to describe adequately the experimental transmission and reflection bistability data. The effect of pump interference on the single-mode operation of the laser is discussed.
DOI
10.1364/ol.20.002210

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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Nov 21, 2007•0 citations
We demonstrate strong optical bistability in a 2 microm continuous-wave Tm,Ho:YLF laser pumped by a 792 nm laser diode near room temperature. The bistable region is as much as 100 mW wide at 283 K and can be controlled by the temperature of the laser crystal. The influence of crystal temperature on the characteristics of optical bistability is obtained. The influence of the pump-to-mode ratio on the bistable characteristics of the laser is also discussed. To our knowledge this is the first report of optical bistability effects in Tm,Ho:YLF lasers.
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A self-saturated absorption regime is proposed to theoretically investigate the optical bistability of Tm,Ho:YLF laser. Based on this bistability regime, the rate equation model of the optical bistability is established. The optical bistability behaviors of Tm,Ho:YLF laser are obtained by numerical simulating. The relation between laser gain and loss are also analyzed to confirm the rationality of the bistability mechanism. Furthermore, the time characters of the optical bistability are investigated. It is found that the high pulse power and the duration of the pre-pump are two major factors that affect the laser turn-on delay time and their influences on the turn-on delay are analyzed.