| 摘要 |
<p>An optical isolator (10) comprises a non-reciprocal rotator (12) disposed between a pair birefringent wedges, an input wedge (14) and an output wedge (16). In order to reduce walk-off between the ordinary and extraordinary rays at the output of the isolator in one embodiment, the input signal (11') is made incident on the input wedge at an angle ( theta c) above the normal to wedge. At a particular angle related to various parameters of the isolator the relative walk-off can be reduced to essentially zero. In another embodiment, the input angle and various isolator parameters are mutually adapted so that the ordinary and extraordinary rays intersect within the isolator. <IMAGE></p> |
