12.5-Gb/s monolithically integrated optical receiver with CMOS avalanche photodetector

Abstract

We present a 12.5-Gb/s monolithically integrated optical receiver with CMOS avalanche photodetector (CMOS-APD) realized in 65-nm CMOS technology. The optical detection bandwidth limitation of CMOS-APD due to the carrier transit time is compensated by underdamped TIA. With this optical receiver, 12.5-Gb/s 850-nm optical data are successfully detected with bit-error rate less than 10 ⁻¹² at the incident optical power of −2 dBm. The fabricated optical receiver has the core size of 0.24 × 0.1 mm ² and its power consumption excluding output buffer is about 13.7 mW with 1.2-V supply voltage.