BROADBAND GENERAL INTERFERENCE MMI-BASED POLARIZATION BEAM SPLITTER

摘要

A polarization beam splitter includes a silicon waveguide body of a thickness in rectangular shape with a width and a length between a first end plane and a second end plane. Two input ports are formed in the first end plane at two separate locations respectively next to two opposing length edges. The silicon waveguide body is configured to generate a plurality of direct or mirror images of an input optical signal provided through at least one of the two input ports. Two output ports are formed in the second end plane, one at a bar-position being configured to output a first output signal substantially in TE polarization mode and another at a cross-position being configured to output a second output signal substantially in TM polarization mode. Preferably, the width is 2.6 μm and the length is 40 μm with the thickness of a silicon layer of a SOI substrate.