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
Link To Document :
