Fabrication and characterization of gain guided, index anti-guided planar waveguide laser resonator

Adam Dittli; Tsing-Hua Her; Lee Casperson

doi:10.1117/12.2005201

22 February 2013 Fabrication and characterization of gain guided, index anti-guided planar waveguide laser resonator

Adam Dittli, Tsing-Hua Her, Lee Casperson

Proceedings Volume 8600, Laser Resonators, Microresonators, and Beam Control XV; 860021 (2013) https://doi.org/10.1117/12.2005201
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

Gain-guided and index anti-guided waveguides hold great promise to increase laser output power while maintaining single mode operation. Although lasing in GG-IAG fibers was demonstrated, slope efficiency is poor and output power is low. This work presents the first, to the best of our knowledge, lasing characteristics of a diode-pumped GG-IAG planar waveguide in a plano-plano resonator configuration. The laser waveguide is fabricated using 1% doped Nd:YAG core with diffusion bonded TGG claddings. With continuous-wave pumping, 8.5% slope efficiency is demonstrated and an output power of 1.5W achieved, the highest power reported so far from a GG-IAG waveguide laser. Under such pumping condition, however, thermal lensing is shown to override gain guiding and mode narrowing is observed.

Citation Download Citation

Adam Dittli, Tsing-Hua Her, and Lee Casperson "Fabrication and characterization of gain guided, index anti-guided planar waveguide laser resonator", Proc. SPIE 8600, Laser Resonators, Microresonators, and Beam Control XV, 860021 (22 February 2013); https://doi.org/10.1117/12.2005201

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