Photonics Research, 2018, 6 (4): 04000332, Published Online: Aug. 1, 2018
Evanescent-wave pumped single-mode microcavity laser from fiber of 125 μm diameter
Abstract
A microcavity laser based on evanescent-wave-coupled gain is formed using a silica fiber with a diameter of 125 μm in a rhodamine 6G ethanol solution. When the fiber is sticking to the cuvette wall by capillary force, using the excitation of a 532 nm nanosecond pulsed laser, single-mode laser emission is observed. While increasing the distance between the fiber and the cuvette wall, the typical multi-peak whispering-gallery-mode (WGM) laser emission can also be demonstrated. On the other hand, while increasing the refractive index of the solution by mixing ethanol and ethylene glycol with different ratios as a solvent, the single-mode emission would evolve to multi-peak WGM laser emission controllably.
Yuchen Wang, Shu Hu, Xiao Yang, Ruizhi Wang, Heng Li, Chuanxiang Sheng. Evanescent-wave pumped single-mode microcavity laser from fiber of 125 μm diameter[J]. Photonics Research, 2018, 6(4): 04000332.