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Optical Fiber Telecommunications VB, 5th Edition
book

Optical Fiber Telecommunications VB, 5th Edition

by Ivan Kaminow, Tingye Li, Alan E. Willner
July 2010
Intermediate to advanced content levelIntermediate to advanced
928 pages
33h 42m
English
Academic Press
Content preview from Optical Fiber Telecommunications VB, 5th Edition
Figure 20.17 depicts several periods of a resonant grating filter (RGF). These
exploit a resonance condition that arises when incident light gets trapped in the
waveguide via evanescent coupling. When this light is out-coupling again, it
interferes destructively with the incoming light, producing very sharp resonances
for narrow ranges of incident angle and wavelength. Hence only a few layers are
needed for narrow band reflection. The angular dependence also provides a
mechanism for tunability. The response of this filter is shown in Figure 20.18 as
a contour plot of angle and wavelength. The first inset shows a cut along wave-
length taken at 40
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Publisher Resources

ISBN: 9780123741721