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Optical Fiber Telecommunications VA, 5th Edition
book

Optical Fiber Telecommunications VA, 5th Edition

by Ivan Kaminow, Alan E. Willner, Tingye Li
July 2010
Intermediate to advanced content levelIntermediate to advanced
944 pages
34h 12m
English
Academic Press
Content preview from Optical Fiber Telecommunications VA, 5th Edition
A star coupler with a low port count has a low efficiency because the waveguides
converge too quickly to convert the plane waves of the free-space region to only
first-order Bloch modes of the waveguide array.
The problem with the three-waveguide directional coupler is that the differ-
ence of the phase between adjacent output waveguides from the coupler when
illuminating one input waveguide of the coupler is always an integer multiple of
90, whereas we would like it to be an integer multiple of 120. We would like it
to be 120 because thi s is the phase difference encountered in an ideal star
coupler, and it is a star coupler that creates a linear ...
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Publisher Resources

ISBN: 9780123741714