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Demonstration of ultralow-threshold 2 micrometer microlasers on chip
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Demonstration of ultralow-threshold 2 micrometer microlasers on chip
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Demonstration of ultralow-threshold 2 micrometer microlasers on chip
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Journal Article
Demonstration of ultralow-threshold 2 micrometer microlasers on chip
2015
Overview
We demonstrate ultralow-threshold thulium-doped, as well as thulium-holmium-codoped, microtoroid lasers on silicon chips, operating at the wavelength of around 2 μm. High quality factor whispering gallery mode （WGM） microtoroid cavities with proper thulium and holmium concentrations are fabricated from the silica sol-gel films. The highly confined WGMs make the microcavity lasers operate with ultralow thresholds, approximately 2.8 μW and 2.7 μW for the thulium-doped and the thuli- um-holmium-codoped microlasers, respectively.
