Compared to the Wavelength Routing (WR) and Optical Packet Switching (OPS) networks

Optical Burst Switching (OBS) is believed to be a more attractive technical solution for future Internet infrastructure.One of the issues of design of OBS switches is how to keep the implementation cost low while maintain high performance.A novel design of photonic switch for OBS net-works is proposed

which is called PM?1? P structure.The Internal Blocking can be effectively avoided in this structure

hence much higher throughput of data burst can be achieved.On the other hand

the proposed design uses less optical elements in terms of optical switching elements

multiplexers and couplers.It turns out to be a more cost-saving design than other photonic switches with similar throughput performance.Results of extensive simulations are presented

and the performance of proposed design is proved.