Open AccessUltraviolet single-frequency coupled optofluidic ring resonator dye laser
Author(s) -
Xiaoguang Tu,
Xiang Wu,
Ming Li,
Liying Liu,
Lei Xu
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.019996
Subject(s) - lasing threshold , whispering gallery wave , resonator , optics , materials science , laser , ring laser , dye laser , optoelectronics , whispering gallery , ultraviolet , physics
Ultraviolet single-frequency lasing is realized in a coupled optofluidic ring resonator (COFRR) dye laser that consists of a thin-walled capillary microfluidic ring resonator and a cylindrical resonator. The whispering gallery modes (WGMs) in each resonator couple to each other and generate single-frequency laser emission. Single-frequency lasing occurs at 386.75 nm with a pump threshold of 5.9 μJ/mm. The side-mode-suppression ratio (SMSR) is about 20 dB. Moreover, the laser emits mainly in two directions, and each of them has a divergence of only 10.5°.