| 摘要 |
An optical device includes a walk-off plate, a lens, a half wave plate, a reflective device, and a non-reciprocal device. The walk-off plate is adapted for coupling to a first port and a second port. The half wave plate is positioned between the walk-off plate and the lens. The half wave plate is also configured to change the polarization of the light received from the first port by a first angle. The non-reciprocal device is positioned between the lens and the reflective device, and the non-reciprocal device is also configured to rotate light passing therethrough by a second angle.
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