Thermal bistability-based method for real-time optimization of ultralow-threshold whispering gallery mode microlasers

Abstract

A method based on thermal bistability for ultralow-threshold microlaser optimization is demonstrated. When sweeping the pump laser frequency across a pump resonance, the dynamic thermal bistability slows down the power variation. The resulting line shape modification enables a real-time monitoring of the laser characteristic. We demonstrate this method for a functionalized microsphere exhibiting a submicrowatt laser threshold. This approach is confirmed by comparing the results with a step-by-step recording in quasi-static thermal conditions.

\<http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-24-5193\>. \<10.1364/OL.37.005193\&gt

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