Recent advances on femtosecond laser writing of waveguides in crystals

Feng Chen

doi:10.1117/12.2583796

5 March 2021 Recent advances on femtosecond laser writing of waveguides in crystals

Feng Chen

Proceedings Volume 11676, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI; 1167619 (2021) https://doi.org/10.1117/12.2583796
Event: SPIE LASE, 2021, Online Only

Abstract

Femtosecond laser writing (FLW) has been recognized as a powerful technique to engineer various materials to realize a number of applications. Dielectric crystals with periodically lattice structures play significant roles for optical and photonic applications. By efficient modification of refractive indices of the dielectrics, optical waveguides with diverse configurations have been produced by FLW. In addition to the well-known parameters of the laser writing system, e.g., pulse energy, scanning speed, and repetition rate, it has also been found that the modification of refractive index strongly depends on the symmetry of the specific crystals, i.e., the crystal system of the lattices. The laser-induced track morphology engineering is crucial to not only tailor the properties of waveguides but also for applications in novel photonic device fabrication. The mode modulation has been therefore implemented by selecting appropriate fabrication conditions according to crystals with different lattice symmetries. Regardless of the complexity of crystal refractive index changes induced by ultrafast pulses, several three-dimensional (3D) geometries have been designed and implemented, which are useful for 3D fabrication of laser written photonic chips. This work gives an overview of the recent advances on the laser-written crystalline waveguides, indicating attractive potential applications in various areas of photonics.

Conference Presentation

Citation Download Citation

Feng Chen "Recent advances on femtosecond laser writing of waveguides in crystals", Proc. SPIE 11676, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI, 1167619 (5 March 2021); https://doi.org/10.1117/12.2583796

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