Resonant optical nonlinearities in semiconductors

By Elsa Garmire. IEEE Journal of Selected Topics in Quantum Electronics, 2000

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Few-layer MoS 2 saturable absorbers for short-pulse laser technology: current status and future perspectives [Invited] (2015, methodology): “This model [91], which assumes an instantaneous material response, has also been extended to account for reverse saturable absorption (RSA) effects (where increased absorption is observed under increased incident intensity), a phenomenon encountered in some nanomaterial-based”
Broadband Graphene Saturable Absorber for Pulsed Fiber Lasers at 1, 1.5, and 2 μm (2014, background): “7% [35], which is much larger than what is typically reported for single layer graphene devices [6], [36], [37] (e.”
Solution processed MoS2-PVA composite for sub-bandgap mode-locking of a wideband tunable ultrafast Er:fiber laser (2015, background): “4 (d)], α(I), is well fitted by the two-level saturable absorber model [71]: α(I) = αs / (1+ I/Isat) + αns; where, I is intensity of the input optical pulse, α(I) is the intensity-dependent absorption, αs and αns are the saturable absorption and non-saturable absorption component, respectively and I”
Wideband-tuneable, nanotube mode-locked, fibre laser. (2008, methodology): “The data for normalized absorption are then fitted according to a simple two-level saturable absorber mode”