| 摘要 |
Input light is split by a PBS into orthogonal polarized waves. One of the polarized waves is reflected by a mirror HR, and input to a 7lambda/8 plate. The other is phase-controlled by a phase controller, and input to the 7lambda/8 plate. The respective light beams to which a phase bias is applied by the 7lambda/8 plate are input from a 2R mirror having reflectances that differ depending on a polarized wave to a GT resonator. The light beams output from the GT resonator again pass through the 7lambda/8 plate, inversely travel the original optical path, and enter the PBS. Then, the light beams are output from an output 1 or 2 depending on a polarized wave.
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