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

Baojun Li; Soo-Jin Chua; Fitzgerald, Eugene A.; Chaudhari, Bharat S.; Jiang, Shaoji; Zhigang Cai
August 2004
Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1119
Academic Journal
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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