Efficient and broadband Cherenkov radiations in the multi-knots of a hollow-core photonic crystal fiber cladding

Yuan, Jinhui, Sang, Xinzhu, Wu, Qiang, Yu, Chongxiu, Shen, Xiangwei, Wang, Kuiru, Yan, Binbin, Han, Ying, Zhou, Guiyao, Semenova, Yuliya, Farrell, Gerald and Hou, Lantian (2013) Efficient and broadband Cherenkov radiations in the multi-knots of a hollow-core photonic crystal fiber cladding. Optics Communications, 291. pp. 317-320. ISSN 0030-4018

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Official URL: http://dx.doi.org/10.1016/j.optcom.2012.10.084

Abstract

The Cherenkov radiations (CRs) at visible wavelengths are efficiently generated based on the soliton self-frequency shift (SSFS) by coupling the 120 fs pulses into the fundamental mode propagated in the multi-knots of a hollow-core photonic crystal fiber cladding (HC-PCFC). When the pump operates at 830 nm with the average power of 300 mW at the knots 1–4 , the central wavelengths of generated CRs λCR are 476 nm, 454 nm, 554 nm, and 580 nm, the conversion efficiencies ηCR are 33%, 35%, 30%, and 29%, and the corresponding bandwidths BCR are 57 nm, 74 nm, 25 nm, and 50 nm, respectively. To the best of our knowledge, ηCR of 35% and BCR of 74 nm are the best experimental results reported with >100 fs pump pulse. The efficient and broadband CRs can be wavelength-tunable over the whole visible wavelength by adjusting the wavelengths of pump pulses coupled into different knots. The result can be used as the multi-channel ultrashort pulse source for many important applications in the multiphoton microscope and ultrafast photonics.

Item Type: Article
Uncontrolled Keywords: fundamental mode, Soliton self-frequency shift
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Ay Okpokam
Date Deposited: 15 May 2015 15:37
Last Modified: 29 Mar 2016 15:01
URI: http://nrl.northumbria.ac.uk/id/eprint/22499

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