Method and apparatus for producing grating, and DFB solid-state dye laser based on the grating

摘要

To provide a DFB solid-state dye laser including a grating having Moire interference fringes. A DFB solid-state dye laser element includes: a laser medium containing an organic dye; and a distribution feedback type resonance unit having a third grating including a Moire fringe corresponding to an overlap between a first grating and a second grating formed in different directions. The third grating including a Moire fringe is formed by irradiating a photoresist with a laser for two-beam interference exposure, and then rotating a substrate by a predetermined angle and re-irradiating the substrate with the laser.