| 摘要 |
PCT No. PCT/GB88/00438 Sec. 371 Date Jan. 23, 1989 Sec. 102(e) Date Jan. 23, 1989 PCT Filed Jun. 3, 1988 PCT Pub. No. WO88/09951 PCT Pub. Date Dec. 15, 1988.An optical switch includes a series of 2(n-1) macro-cells each having a variable polarization rotating cell and a birefringent cell. Each rotating cell is divided into individually addressable and switchable sub-cells. Some of the macro-cells have birefringent cells having a first orientation. In these macro-cells, sub-cells switch light passing through position Pi to either position Pi or Pi+1 of the rotating cell of the next macro-cell in the series. Other macro-cells have birefringent cells having a second orientation. In these macro-cells, the sub-cells switch light passing through position Pi to either position Pi or Pi-1 of the rotating cell of the next macro-cell in the series. The sub-cells of the macro-cells are positioned such that light from any one of several inputs is switchable independently to any one of several outputs. |
