|  | 
         
          | Description: 
             This diagram shows an all-optical 
            switch allowing a light beam to pass from left to right, and then 
            blocking the light beam. |   
          | Source: 
             Stanford University |   
          | Story:  Switch 
            promises optical chips TRN November 19/26, 2003
 |   
          | TRN Categories: 
             Optical Computing, Optoelectronics 
            and Photonics |   
          | Form: 
             Still |  |