High-resolution measurement of the fiber diameter variations using whispering gallery modes and no optical alignment

Light is coupled from the guided mode along one tapered optical fiber into the whispering gallery modes around the circumference of another. Small diameter variations in the second fiber are measured by tracking, at different points along it, the wavelengths at which these modes exist. The measureme...

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Bibliographic Details
Published in:IEEE photonics technology letters 2000-02, Vol.12 (2), p.182-183
Main Authors: Birks, T.A., Knight, J.C., Dimmick, T.E.
Format: Article
Language:English
Subjects:
Alignment
Circumferences
Fibers
Optical fiber devices
Optical fiber sensors
Optical fibers
Optical filters
Optical scattering
Optical sensors
Optical surface waves
Photonics
Resonance
Tracking
Wavelength measurement
Wavelengths
Whispering gallery modes
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Summary:Light is coupled from the guided mode along one tapered optical fiber into the whispering gallery modes around the circumference of another. Small diameter variations in the second fiber are measured by tracking, at different points along it, the wavelengths at which these modes exist. The measurement does not require any optical alignment, and its resolution can be 1 part in 10 000 or better.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.823510