The Ethernet PON (EPON) system has many
advantages, such as compliance with traditional
Ethernet, supporting Triple-play, simple system
architecture, etc. It has become one of the best
technologies in the next generation access
network, In EPON it is important to control
upstream traffic because optical network units
(ONUs) use a single shared medium, In this paper,
a new DBA algorithm was proposed to support
priority and fairness among the ONUs over EPON.
The performance of the proposed DBA algorithm
was evaluated through simulation results and
compared with the IPACT algorithm. From the
simulation result, we have confirmed that the new
DBA algorithm can reduce the average queue
In this paper, a novel scheme of stabilizing all-optical clock recovery is proposed, which uses a mode-locked fiber ring to extract the same frequency clock pulses from the uneven multiplexing 4×10Gbps optical signals. The super-mode suppression ratio reaches 60dB (for signals of 10Gbit/s) and an improvement of 20dB is achieved by adding stabilization devices. Wavelength shift is less than 0.01nm within 2 hours, and this value is about one sixties of that without adding stabilization devices. The results show much better cavity length stability and noise suppression performance.