| 摘要 |
PURPOSE:To obtain a wave synthesizing and dividing means excellent in separated wavelength precision by causing an optical circulator having first to third photoelectric input-output terminals to amplify outgoing signal light into an output signal, and supplying excitation light received from the third photoelectric input-output terminals to an optical fiber from the first photoelectric input-output terminals. CONSTITUTION:Input signal light 6a is supplied to an erbium ion-doped optical fiber 1 from an input-side optical fiber 9 through an optical isolator 4. Excitation light generated by an excitation light source 3 which excites erbium ions is supplied to the port-3 of an optical circulator 2, and transmitted to the erbium ion-doped optical fiber 1 from the port-1. The excitation light is supplied to the optical fiber 1 from a direction opposite to the incident direction of the signal light. Besides the signal light amplified in the optical fiber 1 is supplied to the port-1 of the optical circulator 1, and transmitted to the output optical fiber 10 from the port-2. |
