| 摘要 |
PURPOSE: To simultaneously compress and decompress an optical signal by an optical method of simple construction. CONSTITUTION: An optical signal is duplicated by a certain rule through (M+1) cascade connected 2×2 optical splitting/combining parts 102, 104, 105, 107 capable of simultaneously executing optical splitting and optical combination in both directions and M optical delay parts 103, 106. Optical isolation parts 101, 104 connected to respective one-ends of the optical splitting/combining parts arranged on both ends, and optical switching parts 108, 110 and control parts 111, 112 connected to the other ends of the optical splitting/combining parts on both ends are symmetrically arranged to pass an optical signal based on a certain rule. Thereby optical signals can be simultaneously compressed and decompressed in each N(=2M) unit. Consequently packaging or the like can easily be executed, the number of control means can be reduced and the stability of the system can be improved. |
