Design of a full silica pulse compression grating
Résumé
A diffraction grating engraved on a two-dimensional photonic crystal composed of square air holes in a silica matrix is numerically studied for the compression of ultra-short pulses. The silica is therefore the only solid material of the grating and the reflection of the incident beam is based on the contrast of the air and silica refractive indices. This optical component enables the single use of silica as a solid material presenting a high laser induced damage threshold. In comparison to gratings engraved on a dielectric stack (MLD), it offers the advantage of avoiding the presence of interfaces between 2 solid materials with different mechanical properties, sources of mechanical constraints which can distort the grating.
Domaines
Optique / photoniqueOrigine | Fichiers produits par l'(les) auteur(s) |
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