1 苏州大学应用技术学院，江苏 苏州215325
2 同济大学 航空航天与力学学院，上海 200092
近年来，为了使加工技术更加精准、无误差，各国研究者投入到了微加工领域的研究。而飞秒激光以其极高的峰值、较小的损伤阈值、高的聚焦力，使其成为国内外在微加工领域的热点研究对象。总结了近年来飞秒激光在微加工领域的研究进展，并从微加工金属材料、集成光学、生物医疗、纳米加工领域进行综述，最后指出飞秒激光发展到现在所存在的问题及对未来的期想。
微加工 飞秒激光 损伤阈值 集成光学 micromachining femtosecond laser damage threshold integrated optics
Author Affiliations
Abstract
1 School of Physics, University of Science and Technology of China, Hefei 230026, China
2 Southwestern Institute of Physics, Chengdu 610041, China
System validation and density fluctuation calibration of phase contrast imaging (PCI) on an HL-2A tokamak are presented. Signals from different channels show not only a pronounced modulation of an incident laser beam induced by a sound wave, but also an excellent magnification and low image distortion of optics. The frequency-wavenumber spectrum is achieved by using two-dimensional Fourier transform of time series signals. The conversion coefficient between detected signal amplitude and chord integral plasma density fluctuation is 2.35 × 1013 m 2/mV, which promises a suitable signal level at the order of volts of the PCI in typical HL-2A discharges.
120.5050 Phase measurement 150.1488 Calibration 350.5400 Plasmas 120.5060 Phase modulation Chinese Optics Letters
2018, 16(12): 121201
