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  4. Development of a method to overcome the power threshold during supercontinuum generation based on an Yb-doped photonic crystal fiber
 
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2017
Journal Article
Title

Development of a method to overcome the power threshold during supercontinuum generation based on an Yb-doped photonic crystal fiber

Abstract
Optical coherence tomography benefits from the high brightness and bandwidth, as well as the spatial coherence of supercontinuum (SC) sources. The increase of spectral power density (SPD) over conventional light sources leads to shorter measuring times and higher resolutions. For some applications, only a portion of the broad spectral range can be used. Therefore, an increase of the SPD in specific limited spectral regions would provide a clear advantage over spectral filtering. This study describes a method to increase the SPD of SC sources by amplifying the excitation wavelength inside of a nonlinear photonic crystal fiber (PCF). An ytterbium-doped PCF was manufactured by a nanopowder process and used in a fiber amplifier setup as the nonlinear fiber medium. The performance of the fiber was compared with a conventional PCF that possesses comparable parameters. Finally, the system as a whole was characterized in reference to common solid-state laser-based photonic SC light sources. An order-of-magnitude improvement of the power density was observed between the wavelengths from 1100 to 1350 nm.
Author(s)
Baselt, Tobias  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Taudt, Christopher  orcid-logo
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Nelsen, Bryan
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Lasagni, Andrés-Fabián  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Hartmann, Peter  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Journal
Optical engineering  
Open Access
File(s)
Download (913.89 KB)
Rights
Use according to copyright law
DOI
10.24406/publica-r-250073
10.1117/1.OE.57.2.021207
Language
English
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Keyword(s)
  • supercontinuum

  • ytterbium doped photonic crystal fiber

  • light source

  • nanosecond pulses

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