title: Optical frequency shifter for heterodyne interferometry using counterrotating wave plates.
abstract: A method of optical frequency shifting for heterodyne interferometry based on counterrotating wave plates is described. It is possible with this technique to obtain a higher-frequency shift with fewer components.
authors.forename: M P
authors.initials: MP
authors.lastname: Kothiyal
authors.forename: C
authors.initials: C
authors.lastname: Delisle