| 摘要 |
<p>An optical circulator including at least four ports, polariser means (10, 16, 20, 26) reciprocal rotator means, and Faraday rotators (14, 22), the circulator being substantially tolerant to errors induced by the Faraday rotators and adapted to operate as a four port circulator. An optical circulator having at least three ports and consisting of polariser means (10, 16, 20, 26) and Faraday rotators (14, 22), the circulator being adapted to operate as a three port circulator.</p> |
