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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 6 — Mar. 14, 2011
  • pp: 5277–5282

Efficient KY1-x-yGdxLuy(WO4)2:Tm3+ channel waveguide lasers

K. van Dalfsen, S. Aravazhi, D. Geskus, K. Wörhoff, and M. Pollnau  »View Author Affiliations

Optics Express, Vol. 19, Issue 6, pp. 5277-5282 (2011)

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Gd3+(29.5%)-Lu3+(29.0%)-Tm3+(1.5%) co-doped KY(WO4)2 layers were grown onto KY(WO4)2 substrates by liquid-phase epitaxy. Ridge-type channel waveguides with a thickness of 6.6 μm and a width of 7.5–12.5 μm were microstructured 1.5 μm deep by Ar+-beam milling and overgrown with pure KY(WO4)2 as a cladding layer. An upper limit of ~0.11 dB/cm for the waveguide propagation loss at the laser wavelength was determined. Laser experiments with butt-coupled dielectric mirrors demonstrated maximum output powers of 149 mW and 76 mW and slope efficiencies of 31.5% and 17.0% when pumping at 794 nm and 802 nm in TM and TE polarization, respectively. The lowest threshold was 7 mW. The laser wavelength was found to shift from 1930 nm via 1906 nm to 1846 nm for outcoupling efficiencies from 2% via 8% to 2 × 8%.

© 2011 OSA

OCIS Codes
(130.3130) Integrated optics : Integrated optics materials
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3580) Lasers and laser optics : Lasers, solid-state
(230.7380) Optical devices : Waveguides, channeled
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Integrated Optics

Original Manuscript: January 24, 2011
Revised Manuscript: February 24, 2011
Manuscript Accepted: February 25, 2011
Published: March 7, 2011

K. van Dalfsen, S. Aravazhi, D. Geskus, K. Wörhoff, and M. Pollnau, "Efficient KY1-x-yGdxLuy(WO4)2:Tm3+ channel waveguide lasers," Opt. Express 19, 5277-5282 (2011)

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