| 摘要 |
<p>Rays of light having respective wavelengths angular-dispersed and output from a virtually imaged phased array plate (307) are collected by a lens (308), and diffracted by a grating pair (322) which is an optical path shift generation means and optical path shift amount variation means, and have a shift in a path of rays having different wavelengths. When the rays are reflected by a dispersion leveling three-dimensional mirror (309) and input into the virtually imaged phased array plate (307) again, they are received by portions having different dispersion compensation amount of the three-dimensional mirror (309), thereby realizing different amounts of wavelength dispersion for respective wavelengths, and independently adjusting an amount of wavelength dispersion of the entire wavelengths of the WDM rays and the wavelength dispersion slope. <IMAGE> <IMAGE></p> |
