Characterizing the variation of propagation constants in multicore fiber.
We demonstrate a numerical technique that can evaluate the core-to-core variations in propagation constant in multicore fiber. Using a Markov Chain Monte Carlo process, we replicate the interference patterns of light that has coupled between the cores during propagation. We describe the algorithm and verify its operation by successfully reconstructing target propagation constants in a fictional fiber. Then we carry out a reconstruction of the propagation constants in a real fiber containing 37 single-mode cores. We find that the range of fractional propagation constant variation across the cores is approximately ± 2 × 10(-5).
Peter J
PJ
Mosley
Itandehui
I
Gris-Sánchez
James M
JM
Stone
Robert J A
RJ
Francis-Jones
Douglas J
DJ
Ashton
Tim A
TA
Birks
D000465:Algorithms; D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D009010:Monte Carlo Method; D052898:Optical Tweezers; D012031:Refractometry / Q000295:instrumentation*