Polarization Rotator for Powerful Femtosecond Midinfrared Laser Pulses

IF 0.4 4区 工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY
D. S. Moiseev, M. V. Rozhko, Ya. O. Romanovskii, G. Yu. Levkin, A. V. Mitrofanov, D. A. Sidorov-Biryukov
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Abstract

The optical scheme is presented for rotation of laser pulses polarization based only on reflective elements. The losses and the degree of depolarization introduced by this scheme for laser radiation of the visible, near, and midinfrared ranges are determined. The possibility of using the device in the terahertz frequency range is shown. Numerical analysis was performed using experimentally measured complex reflection coefficients for radiation at wavelengths of 532, 808, and 3900 nm for gold mirrors with a protective coating. The possibility of using the rotator for continuous rotation of the polarization of femtosecond laser pulses of the midinfrared range is experimentally shown. It was found that for femtosecond laser pulses at a central wavelength of 3.9 μm (wavelength range of 3600–4200 nm), the losses introduced by the rotator are less than 8% and the degree of polarization in this case varies from 0.95 to 0.985 depending on the rotator position

Abstract Image

强飞秒中红外激光脉冲偏振旋转器
提出了仅基于反射元件的激光脉冲偏振旋转光学方案。确定了该方案对可见光、近红外和中红外激光辐射的损耗和去极化程度。显示了在太赫兹频率范围内使用该装置的可能性。利用实验测量的532、808和3900 nm波长辐射的复反射系数对带有保护涂层的金反射镜进行了数值分析。实验证明了利用旋转器实现中红外飞秒激光脉冲偏振连续旋转的可能性。结果表明,对于中心波长为3.9 μm(波长范围为3600 ~ 4200 nm)的飞秒激光脉冲,旋转器引入的损耗小于8%,偏振度随旋转器位置的变化在0.95 ~ 0.985之间
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来源期刊
Instruments and Experimental Techniques
Instruments and Experimental Techniques 工程技术-工程:综合
CiteScore
1.20
自引率
33.30%
发文量
113
审稿时长
4-8 weeks
期刊介绍: Instruments and Experimental Techniques is an international peer reviewed journal that publishes reviews describing advanced methods for physical measurements and techniques and original articles that present techniques for physical measurements, principles of operation, design, methods of application, and analysis of the operation of physical instruments used in all fields of experimental physics and when conducting measurements using physical methods and instruments in astronomy, natural sciences, chemistry, biology, medicine, and ecology.
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