M. Govindarajan et al., DC TO 2.5 GB S X 4 P-I-N/HBT OPTICAL RECEIVER ARRAY WITH LOW CROSSTALK/, IEEE photonics technology letters, 5(12), 1993, pp. 1397-1400
We demonstrate a multichannel optical receiver with an In0.53Ga0.47As
p-i-n photodetector array and a monolithic transimpedance amplifier ar
ray fabricated in AlGaAs/GaAs HBT technology. Both flip-chip rear-illu
minated and wire-bonded front-illuminated detector configurations were
implemented. The transimpedance was 65 dB Omega, and the 3-dB bandwid
th was measured to be 2.3 GHz. By using series feedback, the transimpe
dance gain of each cell is matched to within 0.5 dB, and the entire ar
ray operates 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.