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1. Effects of Dentin Ablation by a Q-Switching Er:YSGG Laser with a High Pulse Repetition Rate

Author

Hu Shuwu, Cui Qingzhe, Wu Xianyou, Xiong Zhengdong, Jiang Haihe, Jiang Jiantao, Cheng Tingqing, Wei Meng'en, and Wang Li

Subjects
Pulse repetition frequency, Materials science, Repetition (rhetorical device), Pulse (signal processing), business.industry, medicine.medical_treatment, Biomedical Engineering, Lasers, Solid-State, Laser, Ablation, Q-switching, law.invention, stomatognathic diseases, medicine.anatomical_structure, Optics, stomatognathic system, law, Dentin, medicine, Radiology, Nuclear Medicine and imaging, business
Abstract

Objective: The aim of the study was to evaluate the characteristics of dentin ablation with a high pulse repetition rate Q-switching 2.79 μm laser. Materials and methods: Dentin was ablated using a...

Published
2021

2. 100–300 Hz repetition-rate acousto-optic Q-switched 2.79 μm Er:YSGG laser side-pumped by laser-diode

Author

Hu Shuwu, Li Wang, Xiong Zhengdong, Wu Xianyou, Wei Meng'en, Cui Qingzhe, Jiang Haihe, Jiang Jiantao, and Cheng Tingqing

Subjects
Materials science, Repetition (rhetorical device), Laser diode, business.industry, Pulse duration, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Power (physics), law.invention, Pulse (physics), 010309 optics, Crystal, Optics, law, Optical cavity, 0103 physical sciences, 0210 nano-technology, business
Abstract

An LD-pumped high-repetition-rate Er:YSGG laser utilizing a TeO2 crystal as an acousto-optic Q-switch is proposed and demonstrated. The thermal lensing effect caused by the high-repetition-rate pump is compensated by a plano-convex laser resonator. As a result, a Q-switched 2.79 μm laser with a repetition rate of 100–300 Hz is obtained. When a 100 Hz repetition rate, a 1 mJ pulse energy and a 76 ns pulse duration are employed, the corresponding peak power is 13.2 kW. To the best of our knowledge, this laser offers the highest pulse energy among Q-switched 2.79 μm lasers with pulse repetition rates above one hundred hertz.

Published
2019

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