Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber

Abstract Deep-ultraviolet (UV) second-harmonics (SHs) have important applications in basic physics and applied sciences. However, it still remains challenging to generate deep-UV SHs especially in optical fibers. Here, for the first time, we experimentally demonstrate the deep-UV SH generations (SHG...

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Autores principales:	Jinhui Yuan, Zhe Kang, Feng Li, Guiyao Zhou, Xianting Zhang, Chao Mei, Xinzhu Sang, Qiang Wu, Binbin Yan, Xian Zhou, Kangping Zhong, Kuiru Wang, Chongxiu Yu, Chao Lu, Hwa Yaw Tam, P. K. A. Wai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3cf42f932ca143679324efad94ba244a
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spelling	oai:doaj.org-article:3cf42f932ca143679324efad94ba244a2021-12-02T16:07:45ZDeep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber10.1038/s41598-017-10028-32045-2322https://doaj.org/article/3cf42f932ca143679324efad94ba244a2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-10028-3https://doaj.org/toc/2045-2322Abstract Deep-ultraviolet (UV) second-harmonics (SHs) have important applications in basic physics and applied sciences. However, it still remains challenging to generate deep-UV SHs especially in optical fibers. Here, for the first time, we experimentally demonstrate the deep-UV SH generations (SHGs) by combined degenerate four-wave mixing (FWM) and surface nonlinearity polarization in an in-house designed and fabricated air-silica photonic crystal fiber (PCF). When femtosecond pump pulses with average input power P av of 650 mW and center wavelength λ p of 810, 820, 830, and 840 nm are coupled into the normal dispersion region close to the zero-dispersion wavelength of the fundamental mode of the PCF, the anti-Stokes waves induced by degenerate FWM process are tunable from 669 to 612 nm. Then, they serve as the secondary pump, and deep-UV SHs are generated within the wavelength range of 334.5 to 306 nm as a result of surface nonlinearity polarization at the core-cladding interface of the PCF. The physical mechanism of the SHGs is confirmed by studying the dependences of the output power P SH of the SHs on the PCF length and time. Finally, we also establish a theoretical model to analyze the SHGs.Jinhui YuanZhe KangFeng LiGuiyao ZhouXianting ZhangChao MeiXinzhu SangQiang WuBinbin YanXian ZhouKangping ZhongKuiru WangChongxiu YuChao LuHwa Yaw TamP. K. A. WaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jinhui Yuan Zhe Kang Feng Li Guiyao Zhou Xianting Zhang Chao Mei Xinzhu Sang Qiang Wu Binbin Yan Xian Zhou Kangping Zhong Kuiru Wang Chongxiu Yu Chao Lu Hwa Yaw Tam P. K. A. Wai Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber
description	Abstract Deep-ultraviolet (UV) second-harmonics (SHs) have important applications in basic physics and applied sciences. However, it still remains challenging to generate deep-UV SHs especially in optical fibers. Here, for the first time, we experimentally demonstrate the deep-UV SH generations (SHGs) by combined degenerate four-wave mixing (FWM) and surface nonlinearity polarization in an in-house designed and fabricated air-silica photonic crystal fiber (PCF). When femtosecond pump pulses with average input power P av of 650 mW and center wavelength λ p of 810, 820, 830, and 840 nm are coupled into the normal dispersion region close to the zero-dispersion wavelength of the fundamental mode of the PCF, the anti-Stokes waves induced by degenerate FWM process are tunable from 669 to 612 nm. Then, they serve as the secondary pump, and deep-UV SHs are generated within the wavelength range of 334.5 to 306 nm as a result of surface nonlinearity polarization at the core-cladding interface of the PCF. The physical mechanism of the SHGs is confirmed by studying the dependences of the output power P SH of the SHs on the PCF length and time. Finally, we also establish a theoretical model to analyze the SHGs.
format	article
author	Jinhui Yuan Zhe Kang Feng Li Guiyao Zhou Xianting Zhang Chao Mei Xinzhu Sang Qiang Wu Binbin Yan Xian Zhou Kangping Zhong Kuiru Wang Chongxiu Yu Chao Lu Hwa Yaw Tam P. K. A. Wai
author_facet	Jinhui Yuan Zhe Kang Feng Li Guiyao Zhou Xianting Zhang Chao Mei Xinzhu Sang Qiang Wu Binbin Yan Xian Zhou Kangping Zhong Kuiru Wang Chongxiu Yu Chao Lu Hwa Yaw Tam P. K. A. Wai
author_sort	Jinhui Yuan
title	Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber
title_short	Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber
title_full	Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber
title_fullStr	Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber
title_full_unstemmed	Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber
title_sort	deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3cf42f932ca143679324efad94ba244a
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Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber

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