Patent ID: 11860376
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A polarization decomposition device comprising:
a polarization beam splitter configured to split an optical signal into a first polarized light having a first polarization direction and a second polarized light having a second polarization direction different from the first polarization direction;
a phase shifter configured to delay a phase of the first polarized light;
a polarization rotator configured to rotate the second polarized light so that the polarization direction of the second polarized light is changed; and
an interference beam splitter configured to split the first polarized light in which the phase is delayed and the second polarized light in which the polarization direction is rotated into a third polarized light and a fourth polarized light, split the optical signal having a third polarization direction which is different from at least part of the first and second polarization directions into the third polarized light, and split the optical signal having a fourth polarization direction different from the third polarization direction into the fourth polarized light, and
wherein the polarization rotator configured to rotate the second polarized light so that the polarization direction of the second polarized light is changed from the second polarization direction to the first polarization direction.