We report on a modified Sagnac interferometer used to sort spin–orbit modes of a paraxial beam. The interferometer works as a parity sorter and can be useful for quantum information protocols. The geometry used benefits from phase stability and allows for independent manipulation of the interfering beams.
© 2013 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: February 1, 2013
Revised Manuscript: April 3, 2013
Manuscript Accepted: April 19, 2013
Published: May 22, 2013
A. R. Vieira, M. Hor-Meyll, and A. Z. Khoury, "Spin–orbit mode selection with a modified Sagnac interferometer," J. Opt. Soc. Am. B 30, 1623-1626 (2013)