| 摘要 |
An optical receiving apparatus comprising an optical branching device for separating an optical signal, containing a main optical signal and spontaneously emitted light modulated with an auxiliary signal, into a first optical signal containing the main optical signal and a second optical signal containing the modulated spontaneously emitted light; and demodulating means for performing demodulation to recover the auxiliary signal from the second optical signal. The optical branching device is an optical wavelength-division demultiplexer for separating the optical signal into the first optical signal containing the main optical signal and the second optical signal containing the modulated spontaneously emitted light but substantially not containing the main optical signal. A transmission system including the receiving apparatus is also disclosed.
|
