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Polarization insensitive, low-loss, low-crosstalk wavelength multiplexer modules

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5 Author(s)
Nadler, C.K. ; Inst. for Quantum Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland ; Wildermuth, E.K. ; Lanker, M. ; Hunziker, W.
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A method for compensating polarization sensitivity of arrayed waveguide gratings (AWG's) based on silica-on-Si waveguide technology using stress release grooves and its realization are described. These stress release grooves compensate fabrication-induced waveguide birefringence without performance degradation. An advanced design for low-loss, low-channel imbalance, and low-crosstalk multiplexer is given and results of the realized modules are presented. The TE/TM passband shift could be reduced from 0.7 nm to below 0.05 nm. Insertion loss of the fully packaged wavelength multiplexer modules is <5 dB and adjacent channel crosstalk is as low as <-40 dB

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:5 ,  Issue: 5 )