Shepherd, D.P., Bonner, C.L., Brown, C.T.A., Clarkson, W.A., Tropper, A.C., Hanna, D.C. and Meissner, H.E. (1999) High-numerical-aperture, contact-bonded, planar waveguides for diode-bar-pumped lasers. Optics Communications, 160 (1-3), 47-50. (doi:10.1016/S0030-4018(98)00653-1).
Abstract
We report on the design and fabrication of Nd:YAG planar waveguides suitable for in-plane, diode-bar pumping. Contact-bonded Nd:YAG on Sapphire waveguides are shown to have the high numerical aperture (0.46), low propagation loss (<0.2dB/cm), and good thermal properties necessary to make efficient diode-bar-pumped lasers and amplifiers. Coupling efficiencies of 73% and 60% have been demonstrated between a 20W diode-bar and an 8µm and a 4µm thick planar waveguide respectively, leading to 3.7W of waveguide-laser output.
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