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Low Loss and Low Crosstalk Waveguide Crossings Designed by Wavefront Matching Method

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5 Author(s)
Sakamaki, Y. ; NTT Photonics Labs., Kanagawa ; Saida, T. ; Tamura, M. ; Hashimoto, T.
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We designed waveguide crossings with small angles by the wavefront matching method to reduce excess loss and crosstalk. The designed waveguide crossings were fabricated using silica-based planar lightwave circuit (PLC) technology. We experimentally obtained excess loss and crosstalk values of less than 0.3 and -30 dB, respectively, for a crossing angle of 5deg, and of less than 0.1 and -38 dB, respectively, for an angle of 20deg, in the 1530-1565-nm wavelength range. The designed waveguide crossings are promising as basic circuit elements for realizing more compact PLC devices

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 19 )

Date of Publication:

Oct.1, 2006

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