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Photopolymer-based diffractive and MMI waveguide couplers

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4 Author(s)
Mule', A.V. ; Microelectron. Res. Center, Georgia Inst. of Technol., Atlanta, GA, USA ; Villalaz, R. ; Gaylord, T.K. ; Meindl, J.D.

Diffractive and multimode-interference waveguide couplers constructed from photopolymer materials are presented. Two-material grating-in-the-waveguide optical interconnects are fabricated and tested with respect to waveguide propagation loss and grating out-coupling. Waveguide/grating interconnects have been constructed with both index-defined and air-clad waveguide channel regions, where air-clad channels exhibit measured propagation losses of αwg=0.47-3 dB/cm. Measurements of output coupling coefficients of volume grating couplers terminating various waveguide channels range from αg=1.4-5.3 mm-1. A 1 × 4 photopolymer-based multimode-interference power-splitting coupler fabricated and tested for the provision of in-plane optical coupling is found to demonstrate 0.3-0.6-dB output power uniformity.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 11 )

Date of Publication:

Nov. 2004

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