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DOI: 10.17586/1023-5086-2024-91-07-80-88
УДК: 621.3.095.14, 681.7.068
Optical system for efficient tunable acousto-optic filtering of unpolarized supercontinuum radiation
Сударев А.А., Польщикова О.В., Зотов К.В. Оптическая система для эффективной перестраиваемой акустооптической фильтрации неполяризованного излучения суперконтинуума // Оптический журнал. 2024. Т. 91. № 7. С. 80–88. http://doi.org/10.17586/1023-5086-2024-91-07-80-88
Sudarev A.A., Polschikova O.V., Zotov K.V. Optical system for efficient tunable acousto-optic filtering of unpolarized supercontinuum radiation [in Russian] // Opticheskii Zhurnal. 2024. V. 91. № 7. P. 80–88. http://doi.org/10.17586/1023-5086-2024-91-07-80-88
Subject of study. Transmission and radiation power at the output of a tunable acousto-optical filtering system for unpolarized supercontinuum radiation. Aim of study. Development of a compact, highly efficient optical system for combining ±1 diffraction orders of a tunable acousto-optical filter for filtering unpolarized supercontinuum radiation. Method. A method is proposed for combining two diffraction orders of an acousto-optical filter based on a fiber-optic pump combiner and chromatic shift compensator wedges. The optical system has been modeled and experimentally tested. During the experiment, the influence of radiation instability and stray light on the measurement result was minimized. Main results. The efficiency of the proposed optical system for filtering unpolarized supercontinuum radiation in a wide spectral range has been studied. The optical power at the output of the system increased by 2.2 times compared to using one diffraction order with a linear polarizer. The transmittance of the optical system for combining the diffraction orders of the acousto-optical filter equals to 78%. Practical significance. The presented optical setup can be used as an illumination system in various applications that require tunable spectral filtering of radiation over a wide spectrum range with decreased losses in power and polarization. The optical system is compact and easy to adjust. It can be used in conjunction with the multi-frequency operating mode of an acousto-optical filter to transmit more complex spectral composition, which can be used, for example, in colorimetry.
acousto-optical tunable filter, unpolarized radiation, supercontinuum generator
Acknowledgements:this work was supported by the Ministry of Science and Higher Education of the Russian Federation (project № FFNS-2022-0010). The results were partly obtained on the base of the Center for Collective Use of Scientific and Technological Center of Unique Instrumentation of the Russian Academy of Sciences.
OCIS codes: 230.1040, 260.5430
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