基于Yb: YAG细棒放大器的飞秒激光系统中的非线性现象

IF 0.9 4区工程技术 Q3 Engineering

Quantum Electronics Pub Date : 2022-04-01 DOI:10.1070/qel18024

Jonghwan Kim, S. Park, E. Sall’, G. Kim, V. Yashin, J. Yang

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引用次数: 0

摘要

实验研究了基于薄杆有源元件的高功率激光放大系统中的非线性效应。结果表明，导致激光辐射自聚焦和自相位调制的克尔效应是最重要的非线性效应。Yb: YAG晶体在光谱可见区域的发光是由电荷转移发光效应引起的，而电荷转移发光效应又是由激光辐射的多光子吸收引起的。利用晶体的二阶非线性特性，有效地将飞秒脉冲转换为具有绿光谱和紫外光谱辐射的次谐波和频率波。

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Nonlinear phenomena in femtosecond laser systems based on Yb: YAG thin-rod amplifiers

Nonlinear effects in a high-power laser amplification system based on thin-rod active elements are experimentally investigated. It is shown that the most important nonlinear effect is the Kerr effect leading to self-focusing and self-phase modulation of laser radiation. The observed luminescence in Yb : YAG crystals in the visible region of the spectrum is caused by the charge transfer luminescence effect, which, in turn, is due to multiphoton absorption of laser radiation. Second-order nonlinearity in the crystal is used to effectively convert femtosecond pulses to second harmonic and sum-frequency waves which exhibit radiations of green and UV spectra.

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来源期刊

Quantum Electronics 工程技术-工程：电子与电气

CiteScore

3.00

自引率

11.10%

发文量

审稿时长

3-6 weeks

期刊介绍： Quantum Electronics covers the following principal headings Letters Lasers Active Media Interaction of Laser Radiation with Matter Laser Plasma Nonlinear Optical Phenomena Nanotechnologies Quantum Electronic Devices Optical Processing of Information Fiber and Integrated Optics Laser Applications in Technology and Metrology, Biology and Medicine.