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Passive mode-locking of a Tm-doped bulk laser near 2 microm using a carbon nanotube saturable absorber
Won Bae Cho1, Andreas Schmidt, Jong Hyuk Yim
1Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany.
Abstract:
Stable and self-starting mode-locking of a Tm:KLu(WO(4))(2) crystal laser is demonstrated using a transmission-type single-walled carbon nanotube (SWCNT) based saturable absorber (SA). These experiments in the 2 microm regime utilize the E11 transition of the SWCNTs for nonlinear saturable absorption. The recovery time of the SWCNT-SA is measured by pump-probe measurements as approximately 1.2 ps. The mode-locked laser delivers approximately 10 ps pulses near 1.95 microm with a maximum output power of up to 240 mW at 126 MHz repetition rate.
