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Optical Engineering

Extension of supercontinuum spectrum, generated in polarization-maintaining photonic crystal fiber, using chirped femtosecond pulses
Author(s): Julius Vengelis; Vygandas Jarutis; Valdas Sirutkaitis
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Paper Abstract

We present results of experimental and numerical investigation of supercontinuum (SC) generation in polarization-maintaining photonic crystal fiber (PCF) using chirped femtosecond pulses. The initial unchirped pump pulse source was a mode-locked Yb:KGW laser generating 52-nJ energy, 110-fs duration pulses at 1030 nm with a 76-MHz repetition rate. The nonlinear medium was a 32-cm-long polarization-maintaining PCF manufactured by NKT Photonics A/S. We demonstrated the influence of pump pulse chirp on spectral characteristics of a SC. We showed that by chirping pump pulses positively or negatively one can obtain a broader SC spectrum than in the case of unchirped pump pulses at the same peak power. Moreover, the extension can be controlled by changing the amount of pump pulse chirp. Numerical simulation results also indicated that pump pulse chirp yields an extension of SC spectrum.

Paper Details

Date Published: 2 January 2018
PDF: 10 pages
Opt. Eng. 57(1) 016102 doi: 10.1117/1.OE.57.1.016102
Published in: Optical Engineering Volume 57, Issue 1
Show Author Affiliations
Julius Vengelis, Vilnius Univ. (Lithuania)
Vygandas Jarutis, Vilnius Univ. (Lithuania)
Valdas Sirutkaitis, Vilnius Univ. (Lithuania)

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