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镱钇铝石榴石（Yb:YAG）薄片中径向偏振光束的放大

Amplification of a radially polarised beam in an Yb:YAG thin-slab.

作者信息

Smith C R, Beecher S J, Mackenzie J I, Clarkson W A

机构信息

Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ UK.

出版信息

Appl Phys B. 2017;123(8):225. doi: 10.1007/s00340-017-6802-z. Epub 2017 Aug 5.

DOI:10.1007/s00340-017-6802-z
PMID:32025104
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6979498/
Abstract

The use of an Yb:YAG thin-slab architecture for amplification of a radially polarised beam at 1030 nm is investigated and shown to be a promising route for power scaling. The detrimental impact of the Gouy phase shift on radial polarisation purity is considered and a simple scheme for effective phase shift management to restore polarisation purity is presented. Preliminary experiments based on a double-pass amplifier configuration yielded an output beam with a high radial polarisation extinction ratio of 15 dB and no degradation in polarisation purity despite the non- axial symmetry of amplifier gain medium. At 50 W of launched pump power a small-signal gain of 7.5 dB was obtained for a 25 mW input, whilst 4.4 dB gain was obtained for a 1.45 W input. The prospects for further power scaling are discussed.

摘要

研究了采用镱钇铝石榴石（Yb:YAG）薄板结构在1030纳米波长下放大径向偏振光束的情况，并表明这是一种很有前景的功率缩放途径。考虑了古依相移对径向偏振纯度的不利影响，并提出了一种用于有效相移管理以恢复偏振纯度的简单方案。基于双程放大器配置的初步实验产生了具有15分贝高径向偏振消光比的输出光束，尽管放大器增益介质不具有轴向对称性，但偏振纯度没有下降。在50瓦的泵浦功率输入下，对于25毫瓦的输入获得了7.5分贝的小信号增益，而对于1.45瓦的输入获得了4.4分贝的增益。还讨论了进一步功率缩放的前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/4127e81a6b12/340_2017_6802_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/6bea68be9ea4/340_2017_6802_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/bb05141c67fe/340_2017_6802_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/36100187dc4a/340_2017_6802_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/db1fda598f04/340_2017_6802_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/d7345d9cd1f5/340_2017_6802_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/f16d67e98e88/340_2017_6802_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/9977886efe3a/340_2017_6802_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/ffe9b44a7006/340_2017_6802_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/1de9710c0a86/340_2017_6802_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/4127e81a6b12/340_2017_6802_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/6bea68be9ea4/340_2017_6802_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/bb05141c67fe/340_2017_6802_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/36100187dc4a/340_2017_6802_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/db1fda598f04/340_2017_6802_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/d7345d9cd1f5/340_2017_6802_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/f16d67e98e88/340_2017_6802_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/9977886efe3a/340_2017_6802_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/ffe9b44a7006/340_2017_6802_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/1de9710c0a86/340_2017_6802_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc61/6979498/4127e81a6b12/340_2017_6802_Fig10_HTML.jpg

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本文引用的文献

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Radially polarized emission with 635  W of average power and 2.1  mJ of pulse energy generated by an ultrafast thin-disk multipass amplifier.
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Cladding-pumped ytterbium-doped fiber laser with radially polarized output.具有径向偏振输出的包层泵浦掺镱光纤激光器。
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