| 摘要 |
An optical in-line amplifier and a wavelength-division multiplexer suitable for a fiber-optic network that performs bi-directional transmission over a single optical fiber while using different wavelengths for each direction. By performing wavelength routing using three port devices, optical signals for each direction are separated and extracted. Subsequently, the signals are multiplexed and amplified together with a fiber amplifier. The amplified signals are once again routed to separate and extract the optical signals for each direction and to guide them in the proper direction.
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