Bragg fiber design for linear polarization.
A new design is presented for Bragg fibers that allows low-loss propagation for linearly polarized light. Predictions based on a simple ray model show that approximately doubling the thickness of the first wall layer results in low losses at TM-like boundaries while keeping TE-like boundary losses manageable. This contrasts sharply with conventional quarter-wave designs that are extremely low loss for TE01 modes but very high loss for linear polarization. We fabricate Bragg fibers based on this design concept in a Si/SiO2 system and verify experimentally that they propagate linearly polarized light with losses less than 6 dB/cm over a 60-nm spectral range.
Hadley
G Ronald
GR
Sandia National Laboratories, Albuquerque, New Mexico 87185-5800, USA. grhadle@sandia.gov
Fleming
James G
JG
Lin
Shawn-Yu
SY