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Stable and self-starting mode-locking of a Tm:LiYF4 laser using a single-walled carbon nanotubes based saturable absorber is demonstrated. Pulses as short as 19 ps are generated at a wavelength of ∼ 1888 nm.
Controlling bundling and curl of carbon nanotubes permits ultrafast optical switching, which was demonstrated in a >500 nm near-infrated band by femtosecond mode-locking of three bulk lasers using one and the same saturable absorber.
In this report, we present an alternative approach in which a femto-second pulsed laser beam is employed to cut and trim multi-wall carbon nanotubes (MWCNTs) as predetermined. By using this technique, we are successful to fabricate CNT-tip based cathodes. A very high current and stable field emission are recorded from those emitters.
Different types of carbon nanotube saturable absorbers were fabricated and characterized. Their application for solid-state laser mode-locking enabled the generation of sub-100-fs pulses near 1.25 mum with powers up to 280 mW at 79 MHz.
Mode-locking of the disordered cubic sesquioxide crystal Yb:LuScO3 using a reflection-type single-walled carbon nanotube saturable absorber is demonstrated under diode pumping and compared with passive mode-locking by a commercial SESAM.
Single-walled carbon nanotube saturable absorbers were designed for passive mode-locking near 1 mum. Using Yb:KYW and Yb:KLuW, nearly transform-limited sub-150 fs pulses were generated at 1037 nm and 1048 nm, respectively.
Ultrafast single-walled carbon nanotube saturable absorbers were fabricated and optimized for mode-locking solid-state lasers near 1 mum. Their typical modulation depth and recovery time were measured to be Gt 0.3% and ~ 750 fs, respectively.
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