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Specialty Optical Fibers Handbook
book

Specialty Optical Fibers Handbook

by Alexis Mendez, T. F. Morse
December 2006
Intermediate to advanced
840 pages
28h 20m
English
Academic Press
Content preview from Specialty Optical Fibers Handbook
16.7.5 Variable Attenuators
An in-fiber variable attenuator can be built on a D-shape fiber as a type of the
evanescent field device. If a bulky external material, whose refractive index is
greater than the mode effective index, replaces a part of the evanescent field
reachable cladding, the mode can become leaky and some of the optical power
can be radiated [119]. If the index of the external material can be changed with a
controllable mean, through the effects such as thermo-optic, electro-optic, or
acoustic-optic, a device with controllable attenuation is achievable.
The combination of the fiber and the external bulk overlay has been modeled
as
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Publisher Resources

ISBN: 9780123694065