Patent ID: 8054537

Claim:
A light source apparatus, comprising: a seed light source emitting an optical pulse train as seed light; an optical fiber optically connected to said seed light source, said optical fiber generating supercontinuum light the spectral width of which is enlarged in response to the input of seed light from said seed light source; and spectrum shaping means, disposed in said seed light source or between said seed light source and said optical fiber, for partially or completely deforming the spectral shape of the supercontinuum light generated in said optical fiber, by changing a maximum power of each pulse contained in the optical pulse train to be introduced into said optical fiber, wherein said spectrum shaping means is disposed between said seed light source and said optical fiber, and includes an optical axis adjusting section changing an optical coupling efficiency between said seed light source and said optical fiber, the optical coupling efficiency depending on an optical axis shift between said seed light source and said optical fiber.