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.
© 2004 Optical Society of America
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(220.2740) Optical design and fabrication : Geometric optical design
(230.1480) Optical devices : Bragg reflectors
(230.7370) Optical devices : Waveguides
G. Ronald Hadley, James G. Fleming, and Shawn-Yu Lin, "Bragg fiber design for linear polarization," Opt. Lett. 29, 809-811 (2004)