Mode-locked $1.93\mathrm{\mu }\mathrm{m}$ thulium fiber laser with a carbon nanotube absorber

Abstract

We report a ring-cavity thulium fiber laser mode locked with a single-wall carbon nanotube absorber used in transmission. A carboxymethyl cellulose polymer film with incorporated carbon nanotubes synthesized by the arc discharge method has an absorption coinciding with in the amplification bandwidth of a Tm-doped fiber. This laser is pumped by an erbium fiber laser at $1.57\mathrm{\mu }\mathrm{m}$ wavelength and produces a $37\mathrm{MHz}$ train of mode-locked $1.32\mathrm{ps}$ pulses at $1.93\mathrm{\mu }\mathrm{m}$ wavelength with an average output power of $3.4\mathrm{mW}$.

© 2008 Optical Society of America

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