Mode-locked Tm,Ho:KLu(WO 4 ) 2 laser at 2060 nm using InGaSb-based SESAMs

Passive mode-locking of a Tm,Ho:KLu(WO4)2 laser operating at 2060 nm using different designs of InGaAsSb quantum-well based semiconductor saturable absorber mirrors (SESAMs) is demonstrated. The self-starting mode-locked laser delivers pulse durations between 4 and 8 ps at a repetition rate of 93 MHz with maximum average output power of 155 mW. Mode-locking performance of a Tm,Ho:KLu(WO4)2 laser is compared for usage of a SESAM to a single-walled carbon nanotube saturable absorber.