期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 34, 期 2, 页码 93-96出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2021.3136900
关键词
Coatings; dispersion control; optical design techniques; optical pulse compression; thin films; ultrafast optics
资金
- National Key Research and Development Program of China [2018YFE0118000]
- National Natural Science Foundation of China [11904376, U1630140]
- Chinese Academy of Engineering Physics Joint Fund (NSAF) [U1630140]
- Youth Innovation Promotion Association, Chinese Academy of Sciences [2017289]
- Strategic Priority Research Program of CAS [XDB1603]
This study presents the concept of high-damage-threshold chirped mirrors (HDTCMs) for ultrafast high-power laser systems, and introduces a novel design method to achieve both high reflectivity and high laser-induced damage threshold (LIDT) over a broad bandwidth. The proposed HDTCM design effectively enhances LIDT by manipulating the electric field distribution of laser pulses. As a proof of concept, an HDTCM is designed and achieves a significant increase in LIDT.
This study presents the concept of high-damage-threshold chirped mirrors (HDTCMs) for ultrafast high-power laser systems. We describe a novel design method for the fabrication of HDTCMs to simultaneously achieve high reflectivity and high laser-induced damage threshold (LIDT) over a broad bandwidth. In the proposed novel structure, the squared electric field distribution oscillations of the laser pulse stagger each other, leading to a low average squared E-field distribution and effectively enhancing the LIDT. As a proof of concept study, an HDTCM is designed based on our simulation. The LIDT of the HDTCM increases by a factor of similar to 2.3. Moreover, a HDTCM pair is successfully applied in a cross-polarized-wave (XPW) filter, supporting a near Fourier transform limit (FLT) 17.7-fs pulse generation. This concept can be generalized to virtually any optical coating design, thus advancing high damage resistant mirror fabrication to a level well suited to high-power laser applications.
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