Abstract

The crosstalk in arrayed-waveguide grating multiplexers with a channel spacing of 10 GHz is reduced by compensating for the phase errors after fabrication. We used the thermooptic effect realized with a thin-film heater and the photoelastic effect obtained with amorphous silicon film, respectively, for dynamic and static phase-error compensation. These two methods were applied to confirm the principle and to realize a stable, stand-alone device, respectively. We have achieved a crosstalk of less than {-}35 dB for the TE polarization mode in a 16\;\times\;16, 10 GHz-spacing arrayed-waveguide grating by using these two phase-error compensation techniques. Static phase-error compensation results in a stable multiplexer which features a low crosstalk of less than {-}30 dB for one of the two polarization modes of all the channels without any external control equipment.

[IEEE ]

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References

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  1. M. Okuno, A. Sugita, K. Jinguji, and M. Kawachi, "Birefringence control of silica waveguides on Si and its application to a polarization-beam splitter/switch," J. Lightwave Technol., vol. 12, pp. 625-633, 1994.

J. Lightwave Technol. (1)

M. Okuno, A. Sugita, K. Jinguji, and M. Kawachi, "Birefringence control of silica waveguides on Si and its application to a polarization-beam splitter/switch," J. Lightwave Technol., vol. 12, pp. 625-633, 1994.

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