LIGHT MULTIPLEXER

摘要

According to the present invention, one side surface of a diffraction grating 14 is securely held by a holder 15, and further, the holder 15 is securely supported on a substrate 11 by a supporter 16 in such a manner that the diffraction grating 14 held by the holder 15 is not brought into contact with the substrate 11. In this manner, the diffraction grating 14 is fixed only onto one side surface to the supporter 16 via the holder 15, and further, the diffraction grating 14 is not brought into contact with the substrate 11. Therefore, the lower portion of the supporter 16 is displaced by heat generated in the substrate 11, however, the displacement of the supporter 16 cannot adversely influence directly on the diffraction grating 14 since the holder 15 is interposed between the displaced portion and the diffraction grating 14.