Bending 90° Waveguides in Nd:YAG Crystal Fabricated by a Combination of Femtosecond Laser Inscription and Precise Diamond Blade Dicing

Hao Zha; Yicun Yao; Minghong Wang; Nankuang Chen; Liqiang Zhang; Chenglin Bai; Tao Liu; Yingying Ren; Yuechen Jia

doi:10.3390/cryst13020188

Crystals (Jan 2023)

Bending 90° Waveguides in Nd:YAG Crystal Fabricated by a Combination of Femtosecond Laser Inscription and Precise Diamond Blade Dicing

Hao Zha,
Yicun Yao,
Minghong Wang,
Nankuang Chen,
Liqiang Zhang,
Chenglin Bai,
Tao Liu,
Yingying Ren,
Yuechen Jia

Affiliations

Hao Zha: School of Physics Sciences and Information Technology, Liaocheng University, Liaocheng 252000, China
Yicun Yao: School of Physics Sciences and Information Technology, Liaocheng University, Liaocheng 252000, China
Minghong Wang: School of Physics Sciences and Information Technology, Liaocheng University, Liaocheng 252000, China
Nankuang Chen: School of Physics Sciences and Information Technology, Liaocheng University, Liaocheng 252000, China
Liqiang Zhang: School of Physics Sciences and Information Technology, Liaocheng University, Liaocheng 252000, China
Chenglin Bai: School of Physics Sciences and Information Technology, Liaocheng University, Liaocheng 252000, China
Tao Liu: School of Electronic and Information Engineering, Qingdao University, Qingdao 266071, China
Yingying Ren: Center of Light Manipulations and Applications & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
Yuechen Jia: State Key Laboratory of Crystal Materials, School of Physics, Shandong University, Jinan 250100, China

DOI: https://doi.org/10.3390/cryst13020188
Journal volume & issue: Vol. 13, no. 2
p. 188

Abstract

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In this paper, a low-loss 90°-bending design in femtosecond laser-induced double-line waveguides is theoretically proposed and experimentally demonstrated. The bending is realized based on the total internal reflection of a corner mirror (made by precise diamond blade dicing) located at the intersection of a pair of waveguides perpendicular to each other. The waveguide bending performance was birefringence free, with the insertion loss of each bending below 0.8 dB. This method provides great flexibility and has great potential for the design of integrated photonics based on femtosecond laser-inscribed crystalline materials.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

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