Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 22, Issue 21, Pages 1568-1570Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2010.2070792
Keywords
Bragg reflector; grating coupler; integrated optics; polarization splitter; silicon-on-insulator (SOI)
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A one-dimensional grating serving both as a polarization beam splitter and a vertical coupler for silicon photonic circuits is designed, fabricated, and characterized. Bragg reflectors are employed to improve greatly the coupling efficiency. Over 50% efficiency for both polarizations are achieved experimentally, and the extinction ratio between them is also high (-20 dB).
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