| 摘要 |
<p>One (521) of two optical fibers (521, 531) connecting communication stations is used for transmitting multiple wavelength light supplied from a multiple wavelength light source supply apparatus, and the other (531) for a bidirectional communication using optical signals of respective wavelengths generated from the multiple wavelength light. Alternatively, a transmission of multiple wavelength light and a bidirectional communication using the optical signals are enabled by only one optical fiber (721, 821).
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