摘要 |
SC light is generated from the input signal 2 , of an OTDM signal light 1 with wavelength lambda<SUB>s1 </SUB>and an input signal 2 with wavelength lambda<SUB>s2 </SUB>using an optical fiber and the like, and the wavelength of the SC light is converted into wavelength lambda<SUB>s1 </SUB>using a BPF with center wavelength lambda<SUB>s1 </SUB>(a specific-timing optical pulse with wavelength lambda<SUB>s1 </SUB>is extracted from the SC light). After the addition timing of the wavelength-converted light is adjusted by a delayer (tau) both this wavelength-converted light and signal light 1 are inputted to an optical add circuit and are added.
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