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Compact planar 980/1550-nm wavelength multi/demultiplexer based on multimode interference

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4 Author(s)
Paiam, M.R. ; Telecommun. Res. Lab., Edmonton, Alta., Canada ; Janz, C.F. ; MacDonald, R.I. ; Broughton, J.N.

A compact integrated 980/1550-nm wavelength multi/demultiplexing coupler based on multimode interference effects is demonstrated. The device is useful for integration with rare-earth doped waveguide amplifiers and lasers. It is shown that the device performance can be optimized with an appropriate choice of the coupler width. The coupler is fabricated in a SiO2-SiON deeply-etched rib waveguide system. Theoretical and experimental results for the demultiplexer configuration are presented. At an optimum coupler length of 458 μm, contrast of about 18 dB, and on-chip insertion loss of 0.5 dB at both wavelengths are achieved.

Published in:

Photonics Technology Letters, IEEE  (Volume:7 ,  Issue: 10 )