Optical receiver with large-area photodiode for multilevel modulation

摘要

A large-diameter PIN photodiode (400 μm) with antireflection coating optimized for wavelength 650 nm was integrated with an automatic gain control transimpedance amplifier, linear post amplifier and 50 Ω linear driver. The presented optical receiver shows a high linearity in receiving multilevel signals. A sensitivity of -29.5 dBm (BER = 10~(-9)) at 200 Mb/s with binary signal was achieved. By using four-level pulse amplitude modulation (4-PAM) a data rate of 400Mb/s and a sensitivity of -21.5 dBm (SER = 10~(-9)) was achieved.