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Materials 2014, 7(6), 4658-4668; doi:10.3390/ma7064658
Article

Two Octaves Supercontinuum Generation in Lead-Bismuth Glass Based Photonic Crystal Fiber

1,2,* , 3
, 1
, 1
, 1
, 4
, 2
, 2
, 2
 and 2
1 Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland 2 Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK 3 Fraunhofer Centre for Applied Photonics, 347 Cathedral Street, University Centre, Glasgow G1 2TB, UK 4 Institute of Physics, Wrocław University of Technology, Wyb.Wyspiańskiego 27, 50-370 Wrocław, Poland
* Author to whom correspondence should be addressed.
Received: 21 April 2014 / Revised: 5 June 2014 / Accepted: 9 June 2014 / Published: 19 June 2014
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Abstract

In this paper we report a two octave spanning supercontinuum generation in a bandwidth of 700–3000 nm in a single-mode photonic crystal fiber made of lead-bismuth-gallate glass. To our knowledge this is the broadest supercontinuum reported in heavy metal oxide glass based fibers. The fiber was fabricated using an in-house synthesized glass with optimized nonlinear, rheological and transmission properties in the range of 500–4800 nm. The photonic cladding consists of 8 rings of air holes. The fiber has a zero dispersion wavelength (ZDW) at 1460 nm. Its dispersion is determined mainly by the first ring of holes in the cladding with a relative hole size of 0.73. Relative hole size of the remaining seven rings is 0.54, which allows single mode performance of the fiber in the infrared range and reduces attenuation of the fundamental mode. The fiber is pumped into anomalous dispersion with 150 fs pulses at 1540 nm. Observed spectrum of 700–3000 nm was generated in 2 cm of fiber with pulse energy below 4 nJ. A flatness of 5 dB was observed in 950–2500 nm range.
Keywords: soft glass; supercontinuum generation; photonic crystal fibers soft glass; supercontinuum generation; photonic crystal fibers
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Buczynski, R.; Bookey, H.; Klimczak, M.; Pysz, D.; Stepien, R.; Martynkien, T.; McCarthy, J.E.; Waddie, A.J.; Kar, A.K.; Taghizadeh, M.R. Two Octaves Supercontinuum Generation in Lead-Bismuth Glass Based Photonic Crystal Fiber. Materials 2014, 7, 4658-4668.

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