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We report guiding, lasing action and performance characterization at around 1.9 μm from an ultrafast laser inscribed channel waveguide in a Tm3+-doped fluorogermanate glass.
In this report we have presented a spectroscopic and CW laser characterization of an efficient thulium doped GPNG bulk germanate glass pumped at 792 nm by Ti: Sapphire radiation. Laser characterization gave a maximum slope efficiency of 50 % comparable to the crystalline counterparts and we believe, to the best of our knowledge, this being the best for Tm-doped bulk glass lasers. The maximum output...
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