| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical amplifier system for compensating the wavelength dependence of a gain of an optical amplifier, and an optical variable attenuator. SOLUTION: The optical amplifier system amplifying an optical signal having a predetermined wavelength band includes: an optical amplifier having gain properties with the wavelength dependence; and an optical variable attenuator AAT variably attenuating the optical signal by using the rotation in the polarization direction of the optical signal in a magneto-optical crystal and having attenuation properties with the wavelength dependence substantially reverse to that of the gain in the optical amplifier. The optical signal is attenuated in the optical variable attenuator AAT, and the wavelength dependence of the gain in the optical amplifier is reduced. COPYRIGHT: (C)2010,JPO&INPIT |
