| 摘要 |
PURPOSE: An optical line share coupler is provided to input two optical signals and other two optical signals having different wavelengths, respectively, and to transmit the inputted optical signals by using one optical line, then to separate the inputted optical signals to output the separated signals, thereby easily reducing loss of the optical signals. CONSTITUTION: The first optical input/output element(10b) is attached to one side of a substrate(10a), and a band pass filter(10c) is disposed on the other side of the substrate(10a). An edge filter(10e) is disposed at an interval of a spacer(10d) on an outer side of the band pass filter(10c). The second optical input/output element(10f) and the third optical input/output element(10g) are attached to an outer side of the edge filter(10e). Two optical signals passing through the substrate(10a), the band pass filter(10c), the spacer(10d), and the edge filter(10e) get through the first optical input/output element(10b). Other two optical signals reflexed from the band pass filter(10c) and the edge filter(10e) get through the second optical input/output element(10f). Four optical signals passing through the first and second optical input/output elements(10b,10f) get through the third optical input/output element(10g). |
