We report -switched operation of a planar waveguide laser by evanescent-field interaction with single-walled carbon nanotubes deposited on top of the waveguide. The saturable-absorber-integrated gain medium, which operates based on evanescent-field interaction, enables the realization of a diode-pumped 2.5-cm-long -switched Yb:KYW waveguide laser emitting at 1030 nm. With such a compact cavity design, we achieve maximum output powers of up to 30 mW, corresponding to a single-pulse energy of 124 nJ, at 241 kHz repetition rate. The shortest pulse duration of 433 ns is generated at a repetition rate of 231 kHz.
© 2013 Optical Society of America
(140.3380) Lasers and laser optics : Laser materials
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3540) Lasers and laser optics : Lasers, Q-switched
(230.7390) Optical devices : Waveguides, planar
(140.3615) Lasers and laser optics : Lasers, ytterbium
Lasers and Laser Optics
Original Manuscript: August 26, 2013
Revised Manuscript: October 30, 2013
Manuscript Accepted: October 31, 2013
Published: November 25, 2013
Jun Wan Kim, Sun Young Choi, Dong-Il Yeom, Shanmugam Aravazhi, Markus Pollnau, Uwe Griebner, Valentin Petrov, and Fabian Rotermund, "Yb:KYW planar waveguide laser Q-switched by evanescent-field interaction with carbon nanotubes," Opt. Lett. 38, 5090-5093 (2013)
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