Core-resonance capillary-fiber whispering-gallery-mode laser

We describe the observation of laser emission at wavelengths corresponding to whispering-gallery modes from a highly refractive dye-doped solvent flowing in a normally illuminated silica capillary fiber. The cylindrical whispering-gallery-mode laser described here differs from the well-known spheric...

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Bibliographic Details
Published in:Optics letters 1992-09, Vol.17 (18), p.1280-1282
Main Authors: KNIGHT, J. C, DRIVER, H. S. T, HUTCHEON, R. J, ROBERTSON, G. N
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Optics
Physics
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Description
Summary:We describe the observation of laser emission at wavelengths corresponding to whispering-gallery modes from a highly refractive dye-doped solvent flowing in a normally illuminated silica capillary fiber. The cylindrical whispering-gallery-mode laser described here differs from the well-known spherical droplet laser in that it has an internal refractive index discontinuity. Boundary-value computations are presented that reveal that the feedback responsible for the observed lasing modes is associated with total internal reflection at the liquidsilica interface. No laser peaks are observed when the refractive index of the solvent is less than that of the silica.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.17.001280