| 摘要 |
<p>An interferometer includes (200) a two-frequency laser (210) and a PBS (220) that separates a heterodyne beam (IN) from the laser into separate beams (ROut, TOut) having different the frequencies and orthogonal polarizations. Optical fibers (250,255) conduct the separate beams to a beam combiner (270) for interferometer optics (290). The PBS and/or the beam combiner can use a coating to reflect one linear polarization and transmit an orthogonal linear polarization. To improve extinction ratios in the PBS or the beam combiner, a yaw angle for an input beam is non-zero and corresponds to a peak in the extinction ratio of a reflected beam. <IMAGE></p> |
