期刊
PRAMANA-JOURNAL OF PHYSICS
卷 75, 期 5, 页码 923-927出版社
INDIAN ACAD SCIENCES
DOI: 10.1007/s12043-010-0176-7
关键词
Dye-doped optical fibre; fibre laser; microcavity; whispering gallery mode
We report the observation of multimode laser operation at wavelengths corresponding to whispering-gallery modes from a freestanding microring cavity based on rhodamine B dye-doped PMMA hollow optical fibre. Cylindrical microcavities with diameters 155, 340 and 615 mu m were fabricated from a dye-doped hollow polymer optical fibre preform. An average mode spacing of 0.17 nm was observed for the 340 mu m cavity. This shows that the laser mode intensity distribution is concentrated on the outer edge of the cavity.
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