Type-Ⅰ waveguide and Y-branch splitter fabricated by femtosecond laser direct writing in X-cut LiNO3 crystal

Xiaorui Jiang; Hongliang Liu; Haibo Yang; Jingxin Cheng; Jianda Gu

doi:10.1117/12.2667741

6 March 2023 Type-Ⅰ waveguide and Y-branch splitter fabricated by femtosecond laser direct writing in X-cut LiNO₃ crystal

Xiaorui Jiang, Hongliang Liu, Haibo Yang, Jingxin Cheng, Jianda Gu

Author Affiliations +

Proceedings Volume 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022); 125530A (2023) https://doi.org/10.1117/12.2667741
Event: 2022 4th International Conference on Optoelectronic Science and Materials (ICOSM2022), 2022, Henfei, China

Abstract

At present, femtosecond laser direct writing (FLDW) with high efficiency, has been a popular method to process all kinds of waveguide in optical functional materials. In this paper, the fabrication of Type-Ⅰ waveguides and Y-branch splitters in pure X-cut LiNO₃ (LN) crystal by FLDW has been reported. A guiding cross-section configuration has been produced, resulting from a positive refractive index area along the track induced by FLDW. An end-face coupling system has been used to explore the supported guiding modes at 632.8 nm. Experimental results reveal both TE mode and TM mode are supported in the waveguide, and the total loss of TE mode is larger. For Y-branch splitters, with the splitting angle increasing, the total loss increases rapidly.

Citation Download Citation

Xiaorui Jiang, Hongliang Liu, Haibo Yang, Jingxin Cheng, and Jianda Gu "Type-Ⅰ waveguide and Y-branch splitter fabricated by femtosecond laser direct writing in X-cut LiNO₃ crystal", Proc. SPIE 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022), 125530A (6 March 2023); https://doi.org/10.1117/12.2667741

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KEYWORDS

Waveguides

Polarization

Crystals

Femtosecond phenomena

Laser crystals

Photonic crystals

Microscopes

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