Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrication and application

Yuechen Jia; Shixiang Wang; Feng Chen

doi:10.29026/oea.2020.190042

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Jia Y C, Wang S X, Chen F. Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrica-tion and application. Opto-Electron Adv 3, 190042 (2020). doi: 10.29026/oea.2020.190042

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Jia Y C, Wang S X, Chen F. Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrica-tion and application. Opto-Electron Adv 3, 190042 (2020). doi: 10.29026/oea.2020.190042

Review Open Access

Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrication and application

School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

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^*Corresponding authors: Y C Jia, E-mail: yuechen.jia@sdu.edu.cn; F Chen, E-mail: drfchen@sdu.edu.cn

Received Date 27 November 2019

Accepted Date 10 February 2020

Available Online 23 October 2020

Published Date 23 October 2020

Abstract

Abstract

Optical waveguides are far more than mere connecting elements in integrated optical systems and circuits. Benefiting from their high optical confinement and miniaturized footprints, waveguide structures established based on crystalline materials, particularly, are opening exciting possibilities and opportunities in photonic chips by facilitating their on-chip integration with different functionalities and highly compact photonic circuits. Femtosecond-laser-direct writing (FsLDW), as a true three-dimensional (3D) micromachining and microfabrication technology, allows rapid prototyping of on-demand waveguide geometries inside transparent materials via localized material modification. The success of FsLDW lies not only in its unsurpassed aptitude for realizing 3D devices but also in its remarkable material-independence that enables cross-platform solutions. This review emphasizes FsLDW fabrication of waveguide structures with 3D layouts in dielectric crystals. Their functionalities as passive and active photonic devices are also demonstrated and discussed.
- femtosecond laser micromachining /
- optical waveguide /
- dielectric crystals /
- photonic devices

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References

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