Open AccessQ-switched operation of a femtosecond-laser-inscribed Yb:YAG channel waveguide laser using carbon nanotubes
Author(s) -
Sun Young Choi,
Thomas Calmano,
Mi Hye Kim,
DongIl Yeom,
Christian Kränkel,
G. Hüber,
Fabıan Rotermund
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.007999
Subject(s) - materials science , laser , optics , femtosecond , pulse duration , waveguide , q switching , output coupler , saturable absorption , diode , pulse (music) , optoelectronics , fiber laser , physics , detector
We demonstrate a diode-pumped femtosecond-laser-inscribed Yb:YAG channel waveguide laser, Q-switched by using single-walled carbon nanotubes (SWCNTs) near 1029 nm. We used saturable absorber mirrors (SAMs) fabricated by depositing SWCNTs on three different output couplers. Best performance of the 9.3-mm-long ultra-compact Q-switched waveguide laser is obtained with an output coupling transmission of 20%. In this case, a maximum average output power of 60 mW with a corresponding pulse energy of 37.7 nJ and a pulse duration of 88 ns at 1.59-MHz repetition rate were achieved. The highest pulse energy of 39.2 nJ and the shortest pulse duration of 78 ns were obtained with 30% and 10% output couplers, respectively.
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