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Tunable fibre-coupled multiphoton microscopy with a negative curvature fibre

Title: Tunable fibre-coupled multiphoton microscopy with a negative curvature fibre
Authors: Sherlock, B
Yu, F
Stone, J
Warren, S
Paterson, C
Neil, MAA
French, PMW
Dunsby, CW
Item Type: Journal Article
Abstract: Negative curvature fibre (NCF) guides light in its core by inhibiting the coupling of core and cladding modes. In this work, an NCF was designed and fabricated to transmit ultrashort optical pulses for multiphoton microscopy with low group velocity dispersion (GVD) at 800 nm. Its attenuation was measured to be <0.3 dB m(-1) over the range 600-850 nm and the GVD was -180 ± 70 fs(2)  m(-1) at 800 nm. Using an average fibre output power of ∼20 mW and pulse repetition rate of 80 MHz, the NCF enabled pulses with a duration of <200 fs to be transmitted through a length of 1.5 m of fibre over a tuning range of 180 nm without the need for dispersion compensation. In a 4 m fibre, temporal and spectral pulse widths were maintained to within 10% of low power values up to the maximum fibre output power achievable with the laser system used of 278 mW at 700 nm, 808 mW at 800 nm and 420 mW at 860 nm. When coupled to a multiphoton microscope, it enabled imaging of ex vivo tissue using excitation wavelengths from 740 nm to 860 nm without any need for adjustments to the set-up.
Issue Date: 15-Mar-2016
Date of Acceptance: 27-Jan-2016
URI: http://hdl.handle.net/10044/1/29175
DOI: https://dx.doi.org/10.1002/jbio.201500290
ISSN: 1864-0648
Publisher: Wiley-VCH Verlag
Start Page: 715
End Page: 720
Journal / Book Title: Journal of Biophotonics
Volume: 9
Issue: 7
Copyright Statement: © 2016 The Authors. Journal of Biophotonics published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/F040202/1
Keywords: Photonic crystal fibre
negative curvature
Optoelectronics & Photonics
Publication Status: Published
Appears in Collections:Physics
Faculty of Natural Sciences