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Reducing Polarization-Dependent Loss of Silicon-on-Insulator Fiber to Chip Grating Couplers

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3 Author(s)
Halir, R. ; Dept. de Ing. de Comun., Univ. de Malaga, Malaga, Spain ; Vermeulen, D. ; Roelkens, G.

For many telecommunication applications, low polarization-dependent loss (PDL) operation is mandatory. On the silicon-on-insulator photonic wire platform, this can be achieved using polarization diversity configurations. However, as we show here, when using two-dimensional grating couplers for near vertical fiber input and output, the low PDL bandwidth is limited. We propose and demonstrate the use of a ¿ phase shifter in one of the arms of the polarization diversity circuit to effectively reduce PDL (0.15-dB PDL is shown) and increase the low PDL bandwidth.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 6 )

Date of Publication:

March15, 2010

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