| 摘要 |
PURPOSE:To subject incident light to selective amplification of light of wavelengths different from each other by each one light wave for each of respective sets by constituting plural sets of light guides for incidence and light guides for emission confronting each other. CONSTITUTION:Two pieces of the light guides 1, 2 for incidence are optically connected to one end of a DFB (distributed feedback) type semiconductor laser amplifier 5 in the state that the light guides are inclined respectively by an angle theta(=1 deg.) to the right and left with respect to the end faces thereof. Two pieces of the light guides 3, 4 for emission are optically connected to the other end of the laser amplifier 5. Only the light of the wavelength corresponding to a Bragg wavelength lambdaB1 is, therefore, amplified and is emitted to the light guide 4 when a light signal is entered from the light guide 1. Only the light of the wavelength corresponding to a Bragg wavelength lambdaB2 is amplified and is emitted to the light guide 3 when a light signal is entered from the light guide 2. The incident light is thereby subjected to the selective amplification of the light of the wavelengths varying by each one light wave for each of the respective sets. |
