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Tapered Fabry-Perot waveguide optical demultiplexer

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5 Author(s)
Pezeshki, B. ; IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA ; Tong, F.K. ; Kash, J.A. ; Kisker, D.W.
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We describe a novel waveguide spectrometer for use in wavelength division multiplexing (WDM) systems. A high refractive index resonator is coupled to a waveguide and extracts light from the waveguide at its resonance frequency. A taper in the thickness of the resonator allows light of different wavelengths to be extracted at different positions. A structure is fabricated for use at 750 nm with a measured dispersion of 29 nm/cm and a wavelength resolution of 1 nm. The device operation is in good agreement with first-order coupled-mode calculations.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:5 ,  Issue: 9 )