Optical signal amplifying triode and optical signal transfer method, optical signal relay device, and optical signal storage device using the same

摘要

When in an optical signal amplifying triode 10 , light of a second wavelength lambda₂, selected from among light from a first optical amplifier 26 , into which a first input light L₁ of a first wavelength lambda₁ and a second input light L₂ of second wavelength lambda₂ have been input, and a third input light (control light) L₃ of a third wavelength lambda₃ are input into a second optical amplifier 34 , an output light L₄ of the third wavelength lambda₃, selected from among the light output from the second optical amplifier 34 , is light that is modulated in response to the intensity variation of one or both of the first input light L₁ of the first wavelength lambda₁ and the third input light L₃ of the third wavelength lambda₃ and is an amplified signal, with which the signal gain with respect to the third input light (control light) L₃ of the third wavelength lambda₃ is of a magnitude of 2 or more. An optical signal amplifying triode 10 , which can directly perform an optical signal amplification process using control input light, can thus be provided.