| 摘要 |
PROBLEM TO BE SOLVED: To quickly amplify signal light by a fixed light output even when signal light having a different wavelength or different light intensity is inputted to an SOA. SOLUTION: A light detecting apparatus receives input light branched and output by a branching device, to calculate transmittance and reflectivity from the input light, acquires a wavelength corresponding to the calculated transmittance and reflectivity to calculate a gain value corresponding to input light intensity, acquires a driving current value corresponding to a calculated gain value and an acquired wavelength, and outputs an acquired driving current value. COPYRIGHT: (C)2010,JPO&INPIT
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