Burst Mode Receiver for GPON

This paper presents the design, implementation and test results of Burst Mode Receiver (BMRx) for Gigabit Passive Optical Networks (GPON) at 2.488 Gb/s. Unlike the continuous mode transceivers Optoelectronic Integrated Circuit (OEIC), development of BMRx is challenging since the widely varying amplitude and phase of the received bursts have to be recovered consuming minimum overhead in terms of bits. Circuit level techniques are exploited to meet these demands, such as fast detection for adopting to the incoming power level and gated oscillator for recovering the phase instantaneously, etc. Since GPON serves Fibre to Home (FTTH) applications, the market and the proliferation of the technology is cost sensitive and the proposed BMRx is implemented using 0.18-mum CMOS technology, which also facilitates low power digital functionalities in the application and network layer. The BMRx adapts to varying input photo diode current from 1 muA to 1 mA in 34 bits and recovers the timing instantaneously. Noise level is 700 nA, overload is 1.3 mA corresponding to an optical input power of -30.5 dBm and 2.1 dBm respectively with a dynamic range of more than 30 dB for a typical photo diode with a responsivity of 0.8 mA/mW at 1310 nm wavelength.