*
Corresponding authors
a
Mid-Infrared Photonics Group, George Green Institute for Electromagnetics’ Research, Faculty of Engineering, University of Nottingham, NG7 2RD, UK
E-mail:
angela.seddon@nottingham.ac.uk
b
Vivid Components Ltd, German Office, Dr-Rörig-Damm 22, 33102 Paderborn, Germany
c
Gooch & Housego, UK
d
LISA laser products OHG, Fuhrberg & Teichmann, Albert Einstein Straße, 1-9 37191 Katlenburg-Lindau, Germany
e
NKT Photonics A/S, Blokken 84, DK-3460 Birkerød, Denmark
f
Physics and Astronomy, College of Engineering, Mathematics and Physical Sciences, University of Exeter, EX4 4QL, UK
g
Fibre Sensors and Supercontinuum Group, DTU Fotonik, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
h
Gooch & Housego (Torquay), Broomhill Way, Torquay, UK