| 简介 |
PROBLEM TO BE SOLVED : To provide an ASE light source of single peak spectrum of the wavelength band different from that in the related art, and also to provide the highly accurate single peak spectrum having wider half-value width.
SOLUTION : The ASE light source comprises an excited light source and a rare-earth added fiber for generating the ASE light from the incident excited light. In this ASE light source, the rare-earth added fiber shifts the wavelength of generated ASE light by setting the length of the same fiber longer than that for generating the ASE light in the wavelength band of 1, 565 to 1, 605 nm. Moreover, light intensity for the wavelength in the long wavelength region of the shifted wavelength band is controlled to generate the ASE light of the single peak spectrum. |
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