Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers

We report the spatial beam self-cleaning in bi-tapered conventional multimode fibers (MMFs) with different tapered lengths. Through the introduction of the bi-tapered structure in MMFs, the input beam with poor beam quality from a high-power fiber laser can be converted to a centered, bell-shaped be...

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Autores principales:	Xiao-Jun Lin, Yu-Xin Gao, Jin-Gan Long, Jia-Wen Wu, Xiang-Yue Li, Wei-Yi Hong, Hu Cui, Zhi-Chao Luo, Wen-Cheng Xu, Ai-Ping Luo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bi-tapered fiber multimode fiber spatial beam self-cleaning nonlinear optics Applied optics. Photonics TA1501-1820
Acceso en línea:	https://doaj.org/article/04f7c97787894308879d85e34364bc97
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id	oai:doaj.org-article:04f7c97787894308879d85e34364bc97
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spelling	oai:doaj.org-article:04f7c97787894308879d85e34364bc972021-11-25T18:43:09ZSpatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers10.3390/photonics81104792304-6732https://doaj.org/article/04f7c97787894308879d85e34364bc972021-10-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/479https://doaj.org/toc/2304-6732We report the spatial beam self-cleaning in bi-tapered conventional multimode fibers (MMFs) with different tapered lengths. Through the introduction of the bi-tapered structure in MMFs, the input beam with poor beam quality from a high-power fiber laser can be converted to a centered, bell-shaped beam in a short length, due to the strengthened nonlinear modes coupling. It is found that the bi-tapered MMF with longer tapered length at the same waist diameter shows better beam self-cleaning effect and larger spectral broadening. The obtained results offer a new method to improve the beam quality of high-power laser at low cost. Furthermore, it may be interesting for manufacturing bi-tapered MMF-based devices to obtain the quasi-fundamental mode beam in spatiotemporal mode-locked fiber lasers.Xiao-Jun LinYu-Xin GaoJin-Gan LongJia-Wen WuXiang-Yue LiWei-Yi HongHu CuiZhi-Chao LuoWen-Cheng XuAi-Ping LuoMDPI AGarticlebi-tapered fibermultimode fiberspatial beam self-cleaningnonlinear opticsApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 479, p 479 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bi-tapered fiber multimode fiber spatial beam self-cleaning nonlinear optics Applied optics. Photonics TA1501-1820
spellingShingle	bi-tapered fiber multimode fiber spatial beam self-cleaning nonlinear optics Applied optics. Photonics TA1501-1820 Xiao-Jun Lin Yu-Xin Gao Jin-Gan Long Jia-Wen Wu Xiang-Yue Li Wei-Yi Hong Hu Cui Zhi-Chao Luo Wen-Cheng Xu Ai-Ping Luo Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers
description	We report the spatial beam self-cleaning in bi-tapered conventional multimode fibers (MMFs) with different tapered lengths. Through the introduction of the bi-tapered structure in MMFs, the input beam with poor beam quality from a high-power fiber laser can be converted to a centered, bell-shaped beam in a short length, due to the strengthened nonlinear modes coupling. It is found that the bi-tapered MMF with longer tapered length at the same waist diameter shows better beam self-cleaning effect and larger spectral broadening. The obtained results offer a new method to improve the beam quality of high-power laser at low cost. Furthermore, it may be interesting for manufacturing bi-tapered MMF-based devices to obtain the quasi-fundamental mode beam in spatiotemporal mode-locked fiber lasers.
format	article
author	Xiao-Jun Lin Yu-Xin Gao Jin-Gan Long Jia-Wen Wu Xiang-Yue Li Wei-Yi Hong Hu Cui Zhi-Chao Luo Wen-Cheng Xu Ai-Ping Luo
author_facet	Xiao-Jun Lin Yu-Xin Gao Jin-Gan Long Jia-Wen Wu Xiang-Yue Li Wei-Yi Hong Hu Cui Zhi-Chao Luo Wen-Cheng Xu Ai-Ping Luo
author_sort	Xiao-Jun Lin
title	Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers
title_short	Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers
title_full	Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers
title_fullStr	Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers
title_full_unstemmed	Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers
title_sort	spatial beam self-cleaning in bi-tapered multimode fibers
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/04f7c97787894308879d85e34364bc97
work_keys_str_mv	AT xiaojunlin spatialbeamselfcleaninginbitaperedmultimodefibers AT yuxingao spatialbeamselfcleaninginbitaperedmultimodefibers AT jinganlong spatialbeamselfcleaninginbitaperedmultimodefibers AT jiawenwu spatialbeamselfcleaninginbitaperedmultimodefibers AT xiangyueli spatialbeamselfcleaninginbitaperedmultimodefibers AT weiyihong spatialbeamselfcleaninginbitaperedmultimodefibers AT hucui spatialbeamselfcleaninginbitaperedmultimodefibers AT zhichaoluo spatialbeamselfcleaninginbitaperedmultimodefibers AT wenchengxu spatialbeamselfcleaninginbitaperedmultimodefibers AT aipingluo spatialbeamselfcleaninginbitaperedmultimodefibers
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Spatial Beam Self-Cleaning in Bi-Tapered Multimode Fibers

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