Broadening free spectral range of an evanescent-wave pumped Whispering-Gallery-Mode fibre laser by Vernier effect

作者：Zhou Li; You Hong Hai; Pu Xiao Yun^*

来源：Optics Communications, 2011, 284(13): 3387-3390.

DOI：10.1016/j.optcom.2011.03.040

• Evanescent-wave
• Whispering-Gallery-Mode
• Fibre laser
• Free spectral range
• Vernier effect

Evanescent-wave pumping scheme has been successfully used to excite Whispering-Gallery-Mode fibre laser. The free spectral range of the lasing spectrum from a single optical fibre is found to be very narrow, to increase the free spectral range, a coupled cylinder-cavity structure has been fabricated by binding two bare optical fibres together, based on Vernier effect, the free spectral range of the coupled cylinder-cavity structure has been effectively broadened over 15 times compared with that of a single optical fibre. The measured free spectral ranges for both coupled cylinder-cavity structure and the single optical fibre are consistent with theoretical prediction.

• 出版日期2011-6-15
• 单位云南大学