A thermal bistability-based method for optimization of ultra-low threshold microlasers

Guoping Lin (1, 2) , Yves Candela (1) , Olivier Tillement (3) , Zhiping Cai (2) , Valérie Lefèvre-Seguin (1) , Jean Hare (1)

1 LKB (Lhomond) - Laboratoire Kastler Brossel
2 Xiamen University
3 LPCML - Laboratoire de Physico-Chimie des Matériaux Luminescents

A method based on thermal bistability for ultra-low threshold microlaser optimization is demonstrated. When sweeping the pump laser frequency across a pump resonance, the dynamic thermal bistability slows down the power variation. This enables a realtime monitoring of the laser characteristic, for a functionalized microsphere exhibiting a sub-microwatt laser threshold. This approach is confirmed by comparing the results with a step-by-step recording in quasi-static thermal conditions.

Mots clés: Microcavities; Laser resonators; Neodymium; Thermal effects; Micro-optical devices

Domaines: Physique Quantique [quant-ph]; Optique [physics.optics]

Guoping Lin, Yves Candela, Olivier Tillement, Zhiping Cai, Valérie Lefèvre-Seguin, et al.. A thermal bistability-based method for optimization of ultra-low threshold microlasers. 2010. ⟨hal-00518239v1⟩