Supercontinuum Generation in All-Solid Photonic Crystal Fiber
with Low Index Core¹

R. Buczynski^{a, b,} *, I. Kujawa^b, R. Kasztelanic^a, D. Pysz^b, K. Borzycki^c,
F. Berghmans^d, H. Thienpont^d, and R. Stepien^b

^a Faculty of Physics, University of Warsaw, Pasteura 7, Warsaw 02-093 Poland

^b Glass Laboratory, Institute of Electronic Materials Technology, Wolczynska 133, Warsaw, 01-919 Poland

^c National Institute of Telecommunications, Szachowa 1, Warsaw, 04-894 Poland

^d Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium

*e-mail: rbuczyns@igf.fuw.edu.pl

Received November 13, 2011; in final form, November 20, 2011; published online March 6, 2012

Abstract—In this paper we report on the fabrication and characterization of an all-solid photonic band gap fiber
with high contrast and low index core. The fiber cladding is composed of high index lead-silicate rods while
borosilicate NC21 glass is used as a background glass. A 70 nm wide photonic band gap at 875 nm central wave-
length is experimentally identified and compared with a numerical model. We also present a novel method for
photonic band gap measurement using a femtosecond pulsed laser. The method is verified against standard one
and discussed.

DOI: 10.1134/S1054660X12040019

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