| 摘要 |
Reconfigurable optical switch apparatus (10) comprising m input ports (12), m output ports (14), k add ports (16), k drop ports (18) and a switch matrix (20, 32) comprising m x k wavelength selective optical switches (22) arranged in m rows (24) and k columns (26). Each switch comprises first, second, third and fourth ports. The columns are grouped in adjacent pairs (28), in each pair a first column (26a) being connected to a respective drop port on a first side of the switch matrix and each wavelength selective switch in said first column having the fourth port arranged on said first side and a second column (26b), adjacent the first column, being connected to a respective drop port on a second side, opposite the first side, of the switch matrix and each wavelength selective switch in said second column having the fourth port arranged on said second side, and wherein each of m, k and y is an integer which is at least 2. |
