Optical polarizer based on anti-resonant reflecting optical waveguide under quasi-anti-resonant conditions

A novel optical polarizer based on anti-resonant reflecting optical wavegui de (ARROW) structure at quasi-antiresonant conditions is proposed. The grea t advantage over conventional ARROW devices is the fact that large polariza tion isolation of the proposed polarizer can be obtained even with a thick guiding core. This is accomplished by tuning the ARROW from the anti-resona nt conditions toward the high-order anti-resonances of the second cladding layer. For the SiO2/Si/SiO2 ARROW polarizer with 8 mum thick core, polariza tion isolation ranged from 40 to 57 dB/cm can be achieved if the index detu ning between -3.7% and -4.2% of the core with respect to the second claddin g is assumed. The isolations between the TEo mode and the high-order TE mod es in the transverse direction of the ARROW polarizer were also discussed. (C) 2001 Published by Elsevier Science B.V.