Evanescent-field Q-switched Yb:YAG Channel Waveguide Lasers with Single- and Double-pass Pumping

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A femtosecond-laser inscribed Yb:YAG surface channel waveguide (WG) laser with single-walled carbon nanotubes deposited on the top surface of the WG was passively Q-switched by evanescent field interaction. Q-switched operation of the 14-mm-long compact Yb:YAG WG laser was achieved near 1031 nm with two different pumping schemes (single- and double-pass pumping) with an output coupling transmission of 91%. The Q-switched pulse characteristics depending on the absorbed pump power were investigated for both pumping geometries and analyzed in detail based on theoretical modeling. The best performances (energy/pulse duration) for each configuration were 204.4 nJ/75 ns at a repetition rate of 1.87 MHz, and 201.1 nJ/81 ns at 1.75 MHz for single- and double-pass pumping, respectively.
Publisher
OPTICAL SOC KOREA
Issue Date
2021-04
Language
English
Article Type
Article
Citation

CURRENT OPTICS AND PHOTONICS, v.5, no.2, pp.180 - 185

ISSN
2508-7266
DOI
10.3807/COPP.2021.5.2.180
URI
http://hdl.handle.net/10203/285497
Appears in Collection
PH-Journal Papers(저널논문)
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