Abstract
This paper describes a 150-Mb/s monolithic optical receiver for plastic
optical fiber link using a standard CMOS technology. The receiver integrates a
photodiode using an N-well/P-substrate junction, a pre amplifier, a post amplifier,
and an output driver. The size, PN-junction type, and the number of metal fingers of
the photodiode are optimized to meet the link requirements. The N-well/P-substrate
photodiode has a 200-μm by
200-μm optical window, 0.1-A/W responsivity, 7.6-pF
junction capacitance and 113-MHz bandwidth. The monolithic receiver can successfully
convert 150-Mb/s optical signal into digital data through up to 30-m plastic optical
fiber link with -10.4 dBm of optical sensitivity. The receiver occupies
0.56-mm<sup>2</sup> area including electrostatic discharge protection
diodes and bonding pads. To reduce unnecessary power consumption when the light is
not over threshold or not modulating, a simple light detector and a signal detector
are introduced. In active mode, the receiver core consumes 5.8-mA DC currents at
150-Mb/s data rate from a single 3.3 V supply, while consumes only
120 μW in the sleep mode.
© 2012 Optical Society of Korea
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