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DC to 2.5 Gb/s*4 p-i-n/HBT optical receiver array with low crosstalk

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3 Author(s)
M. Govindarajan ; Center for Laser Studies, Univ. of Southern California, Los Angeles, CA, USA ; S. Siala ; R. N. Nottenburg

A multichannel optical receiver with an In/sub 0.53/Ga/sub 0.47/As p-i-n photodetector array and a monolithic transimpedance amplifier array fabricated in AlGaAs/GaAs HBT (heterojunction bipolar transistor) technology were demonstrated. Both flip-chip rear-illuminated and wire-bonded front-illuminated detector configurations were implemented. The transimpedance was 65 dB Omega , and the 3-dB bandwidth was measured to be 2.3 GHz. By using series feedback, the transimpedance gain of each cell was matched to within 0.5 dB, and the entire array operated from a single 5-V supply. A low interchannel crosstalk of less than -40 dB was measured up to a data rate of 2 Gb/s.<>

Published in:

IEEE Photonics Technology Letters  (Volume:5 ,  Issue: 12 )