| 摘要 |
<p>A single channel M x N optic switch is provided to steer light radiating from any one fiber in an input bundle (30) into any selected fiber in an output bundle (32). Precision beam-steering optics is implemented using a Risley prism pair (34, 36) controlled by a small computer. In order to efficiently couple light between two fibers a low-aberration lens (38) approximately collimates the light from the source fiber before it is passed through the prisms in order to minimize the aberrations introduced by the prisms as they collectively deflect the beam through some precise angle. In order to switch the light from one fiber in the ouput bundle to another, the prisms (34, 36) are individually rotated about the optical axis to predetermined orientations so as to deflect the collimated light at the exact angle necessary to direct the focused spot to the core of a selected output fiber.</p> |
