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发射具有轴对称偏振光束的高功率薄片激光器。

High-power thin-disk lasers emitting beams with axially-symmetric polarizations.

作者信息

Abdou Ahmed Marwan, Beirow Frieder, Loescher André, Dietrich Tom, Bashir Danish, Didychenko Denys, Savchenko Anton, Pruss Christof, Fetisova Marina, Li Fangfang, Karvinen Petri, Kuittinen Markku, Graf Thomas

机构信息

Institut für Strahwerkzeuge IFSW, Universität Stuttgart Fakultät 7 für Konstruktions- Produktions- und Fahrzeugtechnik, Pfaffenwaldring 43, Stuttgart 70569, Germany.

Institut für Technische Optik ITO, Universität Stuttgart Fakultät 7 für Konstruktions- Produktions- und Fahrzeugtechnik, Stuttgart, Baden-Württemberg, Germany.

出版信息

Nanophotonics. 2021 Dec 2;11(4):835-846. doi: 10.1515/nanoph-2021-0606. eCollection 2022 Jan.

DOI:10.1515/nanoph-2021-0606
PMID:39635366
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11501938/
Abstract

We present the intracavity generation of beams with radial polarization at an average output power of 750 W and an optical efficiency of 43% from a continuous wave thin-disk laser. Circular grating waveguide output couplers (GWOC) were used to select the radial polarization. The sensitivity of the polarizing function of the GWOC with regards to the fabrication tolerances is also analysed in details with a particular emphasis on the effect of the duty cycle and the geometrical profile of the gratings. Furthermore, we present the conversion of femtosecond laser pulses from linear to azimuthal polarization using a nanograting-based polarization converter. Azimuthally polarized beams with an average power of up to 850 W, a pulse duration of 400 fs and a pulse repetition rate of 1 MHz were generated in this way with a conversion efficiency of >90%.

摘要

我们展示了从连续波薄片激光器中以750瓦的平均输出功率和43%的光学效率腔内产生径向偏振光束的方法。使用圆形光栅波导输出耦合器（GWOC）来选择径向偏振。还详细分析了GWOC偏振功能对制造公差的敏感性，特别强调了占空比和光栅几何轮廓的影响。此外，我们展示了使用基于纳米光栅的偏振转换器将飞秒激光脉冲从线性偏振转换为方位角偏振的方法。通过这种方式产生了平均功率高达850瓦、脉冲持续时间为400飞秒且脉冲重复频率为1兆赫兹的方位角偏振光束，转换效率大于90%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/4f0b545a2d11/j_nanoph-2021-0606_fig_011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/168fbe7466b7/j_nanoph-2021-0606_fig_001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/7e7c4d99f1e2/j_nanoph-2021-0606_fig_002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/9b7f339e9e12/j_nanoph-2021-0606_fig_003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/36a4912590a6/j_nanoph-2021-0606_fig_005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/b5f51120de1b/j_nanoph-2021-0606_fig_006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/2f6dc3219c9c/j_nanoph-2021-0606_fig_007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/ea2d82eb5b5c/j_nanoph-2021-0606_fig_008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/5d3529634fa8/j_nanoph-2021-0606_fig_009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/d8a5cc94c9a5/j_nanoph-2021-0606_fig_010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/4f0b545a2d11/j_nanoph-2021-0606_fig_011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/168fbe7466b7/j_nanoph-2021-0606_fig_001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/7e7c4d99f1e2/j_nanoph-2021-0606_fig_002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/9b7f339e9e12/j_nanoph-2021-0606_fig_003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/36a4912590a6/j_nanoph-2021-0606_fig_005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/b5f51120de1b/j_nanoph-2021-0606_fig_006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/2f6dc3219c9c/j_nanoph-2021-0606_fig_007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/ea2d82eb5b5c/j_nanoph-2021-0606_fig_008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/5d3529634fa8/j_nanoph-2021-0606_fig_009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/d8a5cc94c9a5/j_nanoph-2021-0606_fig_010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/afb6/11501938/4f0b545a2d11/j_nanoph-2021-0606_fig_011.jpg

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