Double-clad structures and proximity coupling for diode-bar-pumped planar waveguide lasers

We report, for the first time, fabrication of double-clad planar waveguide structures and their use for multiwatt, diode-bar-pumped, planar waveguide lasers based on Nd/sup 3+/ and Yb/sup 3+/-doped YAG. The direct-bonded, five-layer structures of sapphire, YAG, and rare-earth-doped YAG have sufficie...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2000-02, Vol.36 (2), p.236-242
Main Authors: Bonner, C.L., Bhutta, T., Shepherd, D.P., Tropper, A.C.
Format: Article
Language:English
Subjects:
Apertures
Diffraction
Diode-pumped lasers
Diodes
Doped-insulator lasers and other solid state lasers
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Joining
Laser outputs
Lasers
Neodymium
Optical coupling
Optical device fabrication
Optical devices
Optical planar waveguides
Optical waveguides
Optics
Physics
Planar waveguides
Proximity
Waveguide lasers
YAG
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Summary:We report, for the first time, fabrication of double-clad planar waveguide structures and their use for multiwatt, diode-bar-pumped, planar waveguide lasers based on Nd/sup 3+/ and Yb/sup 3+/-doped YAG. The direct-bonded, five-layer structures of sapphire, YAG, and rare-earth-doped YAG have sufficient numerical aperture to capture the fast-axis divergence of a diode bar by proximity coupling with no intervening optics, leading to very simple and compact devices. The restriction of the doped region to the central core leads to diffraction-limited laser output in the guided direction. We also show that the direct-bonding fabrication process can lead to a linearly polarized output.
ISSN:0018-9197
1558-1713
DOI:10.1109/3.823470