Patent attributes
A method including: (i) directing a beam to an interferometer head using an optical connection, the beam including a first beam component having a first polarization and a first frequency and a second beam component having a second polarization different from the first polarization and a second frequency; (ii) rotating the polarization of the first beam component to the second polarization; (iii) rotating the polarization of the second beam component to the first polarization; and (iv) returning the beam with the rotated polarizations from the interferometer head using the optical connection. For example, the step of directing may include: directing the first beam component into a first fiber of the optical connection; and directing the second beam component into a second fiber of the optical connection. The first beam component may be returned using the second fiber, and the second beam component may be returned using the first fiber.
