Abstract
We use a new (to our knowledge) fabrication method of a single-walled carbon nanotube (SWCNT) absorber without polymer to sustain high-power illumination. Using a series of saturable absorbers (SAs) incorporating different amounts of SWCNTs, we demonstrate mode-locking for a laser in the spectral range. Continuous- wave mode-locking (CWML) pulses with a maximum output power of at and high noise extinction of has been achieved to give the highest pulse peak power of and pulse energy of under pumping. To our knowledge, this is the highest CWML output power with SWCNT-SAs reported. The measured nonlinear absorption of the SWCNT-SAs shows a modulation depth of with subpicosecond recovery time.
© 2011 Optical Society of America
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