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Article Dans Une Revue Optical Materials Express Année : 2022

High refractive index change in Type A laser modification using a multi-scan approach

Résumé

The focusing of femtosecond laser pulses is an efficient and robust way to fabricate integrated optical components in glasses. However, the induced refractive index changes are weak if compared with those obtained in lithography. Several solutions have been found to overcome such problem, the multi-scan technique being one of these. The present work implements the multi-scan approach on the femtosecond inscription of Type A laser modifications in high repetition rate regime. Therefore, a study on the effects of the absorption of subsequent laser pulses on the increase of the induced refractive index is conducted. As a result, the achievement of high and smooth refractive index change, up to 2 × 10 −2 , in a commercial silver-glass is reported. Moreover, such high and controlled index contrast is exploited for the fabrication of low-propagation-losses and engineered waveguides exhibiting single-mode operation in the VIS-NIR range.

Domaines

Matériaux
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Dates et versions

hal-03682480 , version 1 (31-05-2022)

Licence

Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales

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Laura Loi, Yannick Petit, Lionel Canioni. High refractive index change in Type A laser modification using a multi-scan approach. Optical Materials Express, 2022, 12 (6), pp.2297-2308. ⟨10.1364/ome.457655⟩. ⟨hal-03682480⟩
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