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Selective excitation of the TE/sub 01/ mode in hollow-glass waveguide using a subwavelength grating

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4 Author(s)
Mohammed, W.S. ; Coll. of Opt. & Photonics/CREOL, Univ. of Central Florida, Orlando, FL, USA ; Mehta, A. ; Pitchumani, M. ; Johnson, E.G.

In this work we demonstrate, for the first time to our knowledge, a novel subwavelength optical element for the selective excitation of the TE/sub 01/ mode inside a 300-μm bore diameter hollow-glass waveguide (HGW) in order to reduce the transmission loss. The device consists of form birefringent gratings, where each section is oriented in a different direction so as to convert a linearly polarized input light to a rotating polarized one matching the TE/sub 01/ mode. Using this polarization converting element, we measured a 1.65-dB decrease in the transmission loss in the HGW at a wavelength of 1.55 μm.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 7 )