4.6 Article

Waveguide lasers in ytterbium-doped tantalum pentoxide on silicon

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OPTICS LETTERS
卷 40, 期 11, 页码 2549-2552

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OPTICAL SOC AMER
DOI: 10.1364/OL.40.002549

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  1. UK EPSRC [EP/J008052/1]
  2. EPSRC [EP/L00044X/1, EP/J008052/1] Funding Source: UKRI
  3. Engineering and Physical Sciences Research Council [EP/L00044X/1, 1105945, EP/J008052/1] Funding Source: researchfish

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A waveguide laser in an ytterbium-doped tantalum pentoxide film is reported. The waveguide is formed of a rib of sputtered tantalum pentoxide on top of oxidized silicon with an over-cladding of silica. Emission at a wavelength of 1025 nm was achieved with an absorbed pump power threshold and slope efficiency of approximate to 29 mW and 27%, respectively, for a cavity formed by a high reflector mirror and an estimated 12% Fresnel reflection from the bare end-face at the output. (C) 2015 Optical Society of America

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