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Intelligent integration of optical power splitter with optically switchable cross-connect based on multimode interference principle in SiGe/Si

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6 Author(s)
Li, Baojun ; State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China ; Chua, Soo-jin ; Fitzgerald, E.A. ; Chaudhari, Bharat S.
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An intelligent and monolithic integration of optical power splitter with optically switchable cross-connect has been proposed. It is fabricated on the multimode interference principle in Si-based SiGe material system and configured for a 3×2 symmetrical structure of the three input waveguides and the two output waveguides. The central waveguide section is based on a multimode interference and incorporated with an activated carrier injection element. The operating wavelengths of the device are specially designed for 1545, 1550, and 1555 nm conventional-band wavelengths. The measured crosstalk is at around -17 dB and the average insertion loss is about 5.25 dB. At switch-ON state, the measured injection current is 370 mA corresponding to an injection current density of 950 A/cm2.

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Applied Physics Letters  (Volume:85 ,  Issue: 7 )