Silicon-on-Insulator CWDM Power Monitor/Receiver With Integrated Thin-Film InGaAs Photodetectors |
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| Authors: | Brouckaert J. Roelkens G. Selvaraja S.K. Bogaerts W. Dumon P. Verstuyft S. Van Thourhout D. Baets R. |
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| Affiliation: | Dept. of Inf. Technol., Ghent Univ., Ghent, Belgium; |
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| Abstract: | In this letter, we demonstrate a compact and cost-effective four-channel demultiplexer with integrated photodetectors for application in coarse wavelength-division-multiplexing systems. The device consists of a silicon-on-insulator planar concave grating (PCG) demultiplexer and heterogeneously integrated InAlAs-InGaAs metal-semiconductor-metal photodetectors, and has a footprint of only 0.1 mm2 . The PCG and integrated photodetectors have a responsivity of 0.6 A/W for TE-polarized light. The integrated device has an optical crosstalk of -25 dB. |
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