DocumentCode
1121765
Title
Radiation losses from couplers
Author
Snyder, Allan W. ; Rühl, Frank F.
Author_Institution
Australian National Uniersity, Canberra, Australia
Volume
3
Issue
1
fYear
1985
fDate
2/1/1985 12:00:00 AM
Firstpage
31
Lastpage
36
Abstract
The antisymmetric mode of couplers, composed of two parallel fibers, becomes cut off when 
is sufficiently small. We show that the familiar perturbation modes of this coupler give an excellent approximation to the cutoff value of previously obtained by an exact analysis. More importantly, by using the perturbation modes, we establish that the rate of leakage below cutoff sets a genuine practical limitation to operation. To do this, we develop a scalar theory for radiation losses.
is sufficiently small. We show that the familiar perturbation modes of this coupler give an excellent approximation to the cutoff value of previously obtained by an exact analysis. More importantly, by using the perturbation modes, we establish that the rate of leakage below cutoff sets a genuine practical limitation to operation. To do this, we develop a scalar theory for radiation losses.Keywords
Optical fiber coupling; Frequency; Isolation technology; Mathematics; Optical attenuators; Optical fiber couplers; Optical fiber theory; Optical waveguides; Partial differential equations; Perturbation methods; Propagation constant;
fLanguage
English
Journal_Title
Lightwave Technology, Journal of
Publisher
ieee
ISSN
0733-8724
Type
jour
DOI
10.1109/JLT.1985.1074170
Filename
1074170
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