3-port optical device

摘要

A thee port polarization beam splitter is disclosed which utilizes only two GRIN lenses. Two beams are split by a bireferingent crystal into two orthogonally linear polarized parallel sub-beams. The two parallel beams are redirected to converge to a single same location at an end face of the GRIN lens by a roof prism and are coupled by the same lens to two optical fibers held in a fiber tube physically coupled to the GRIN lens.