| 摘要 |
A triplexer optical module is provided to use a common lens, instead of an expensive collimating lens, thereby shortening the assembling time and thus reducing the cost. An optical cable outputs a digital down optical signal and an analog down optical signal, and receives a digital up optical signal. A first filter(12) extracts the analog down optical signal, and a first lens(14) collects the analog down optical signal extracted by the first filter. A first photoelectric converter(16) converts the light collected by the first lens into an electric signal. A second filter(13) extracts the analog down optical signal, and a second lens(17) collects the analog down optical signal extracted by the second filter. A second photoelectric converter(19) converts the light collected by the second lens into an electric signal. A photoelectric converter converters the digital up electric signal to an optical signal. A third lens(18) collects the light output from the photoelectric converter.
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