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arXiv · 1509.00373

On-Chip Diamond Raman Laser

Pawel Latawiec·Vivek Venkataraman·Michael J. Burek·Birgit J. M. Hausmann·Irfan Bulu·Marko Loncar
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Abstract

Synthetic single-crystal diamond has recently emerged as a promising platform for Raman lasers at exotic wavelengths due to its giant Raman shift, large transparency window and excellent thermal properties yielding a greatly enhanced figure-of-merit compared to conventional materials. To date, diamond Raman lasers have been realized using bulk plates placed inside macroscopic cavities, requiring careful alignment and resulting in high threshold powers (~W-kW). Here we demonstrate an on-chip Raman laser based on fully-integrated, high quality-factor, diamond racetrack micro-resonators embedded in silica. Pumping at telecom wavelengths, we show Stokes output discretely tunable over a ~100nm bandwidth around 2-μm with output powers >250 μW, extending the functionality of diamond Raman lasers to an interesting wavelength range at the edge of the mid-infrared spectrum. Continuous-wave operation with only ~85 mW pump threshold power in the feeding waveguide is demonstrated along with continuous, mode-hop-free tuning over ~7.5 GHz in a compact, integrated-optics platform.

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Pawel Latawiec, Vivek Venkataraman, Michael J. Burek, Birgit J. M. Hausmann, Irfan Bulu, Marko Loncar. 2015-09-01. On-Chip Diamond Raman Laser. https://doi.org/10.1364/optica.2.000924

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