AI Article Synopsis
- The first erbium-doped double tungstate waveguide laser using a monoclinic Er:KLu(WO) crystal was developed.
- A 60 µm-diameter depressed-index buried channel waveguide was created using advanced 3D femtosecond laser writing techniques, with its structural integrity confirmed through various microscopy methods.
- The diode-pumped waveguide laser produced 8.9 mW of output power at 1533.6 nm, boasting a 20.9% slope efficiency and requiring a 93 mW threshold of absorbed pump power.
Article Abstract
We report on the first erbium (Er) doped double tungstate waveguide laser. As a gain material, we studied a monoclinic Er:KLu(WO) crystal. A depressed-index buried channel waveguide formed by a 60 µm-diameter circular cladding was fabricated by 3D femtosecond direct laser writing. The waveguide was characterized by confocal laser microscopy, µ-Raman and µ-luminescence mapping, confirming that the crystallinity of the core is preserved. The waveguide laser, diode pumped at 981 nm, generated 8.9 mW at 1533.6 nm with a slope efficiency of 20.9% in the continuous-wave regime. The laser polarization was linear (E || N). The laser threshold was at 93 mW of absorbed pump power.
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| http://dx.doi.org/10.1364/OE.26.030826 | DOI Listing |
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