Since the underlying demand for network capacity can be satisfied only by extremely increasing transmission bit rate,
processing speed, and switching capacity, it definitely will lead to increased power consumption of network nodes.
Energy crisis is global crisis nowadays and it has brought up many problems. Power consumption is becoming a crucial
issue in designing high-performance network devices. This paper studies the power consumption model of a kind of
Optical Packet Switching (OPS) node based on Semiconductor Optical Amplifiers (SOA). Our results show that by
dynamically adjusting the bias current of SOAs, the power consumption on an OPS node can be reduced considerably,
especially when the traffic distribution across multiple ports is not balanced and inter-nodal distances vary. The total
electrical power consumption can be cut off significantly. We also show the power consumption can be further reduced
by jointly optimizing the thermoelectric cooler current.