Abstract
A low-threshold self-starting Kerr-lens mode-locked Ti:sapphire laser is demonstrated that uses a tight-focusing cavity design in conjunction with a semiconductor saturable- absorber mirror (SESAM). With and output couplers, we achieve mode-locking thresholds as low as 390 and , respectively. Stable femtosecond laser pulses with average power of are generated at a pump power of , which corresponds to a typical duration of and bandwidth of . Mode-locking operation is achieved in a pump power range of to at an output coupling of ; the advantages of using a SESAM for low-power mode-locking operation are demonstrated.
© 2006 Optical Society of America
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