| 摘要 |
PROBLEM TO BE SOLVED: To obtain an improved capability, to maintain the good sepn. of channels and to improve a spectral width by forming an optical system having multiple transverse foci at a dispersion plane by a dispersion system and means for optically matching the output plane of input fibers and the input plane of an output fiber. SOLUTION: The dispersion system and the means for optically matching the output plane of the input fibers and the input plane of the output fiber form the optical system having the multiple transverse foci 6 at the dispersion plane. This optical system 6 is a system having the multiple transverse foci, and in this case, double foci. Namely, the flow of the luminous flux emitted by one of the input fibers is not converged to the single point as in the case of the conventional system of the single focus but is converged at two points respectively. The basic transfer function of such system is obtd. by adding the transfer function obtd. with the part of the optical system converging at the point and the transfer function obtd. with the part of the flow converging at another point. |
