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High-density integrated planar lightwave circuits using SiO2 -GeO2 waveguides with a high refractive index difference

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4 Author(s)
Suzuki, S. ; NTT Opto-Electron. Labs., Ibaraki, Japan ; Yanagisawa, Masahiro ; Hibino, Y. ; Oda, K.

GeO2-doped silica waveguides with a high refractive index difference of 1.5% are successfully fabricated on Si substrates. Their propagation loss, measured in 200-cm-long test circuits with a minimum curvature radius of 2 mm, is 0.073 dB/cm. The waveguides are used as high-density integrated planar lightwave circuits in 1×4 Mach-Zehnder (MZ) type multi/demultiplexers for optical frequency division multiplexing (FDM) transmission systems and in modified MZ type multi/demultiplexers with a ring resonator, which have a compact device size of 15×50 mm2 and a frequency spacing of 10 GHz

Published in:

Lightwave Technology, Journal of  (Volume:12 ,  Issue: 5 )