The alignment possible type dispersed compensator has the diffraction grating element which is the guided wave road which possesses bulk type guided wave road clogging big diameter, this diffraction grating element the inside core and outside being arranged around that, has the cladding. Diameter of the end of the diffraction grating element it is possible by etching in the aforementioned diffraction grating element, it grinds or it machines, to make the substantial dog bone form which is larger than diameter of the central part at these time. The chiyapu diffraction grating draws in the part of the core and in the central part of the aforementioned diffraction grating element is packed, in other words is stamped. It has reached the point where difference occurs in the pressure which joins to the case where the aforementioned diffraction grating element was compressed to longitudinal direction due to the fact that the aforementioned central part is made taper condition, by load F, according to the total length of the diffraction grating.
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