High peak power amplification in large-core all-solid Yb fibers with an index-elevated pump clad and a low numerical aperture core

in: Temporal Proceedings (2015)
Leich, Martin; He, Wenbin; Grimm, Stephan; Kobelke, Jens; Zhu, Yuan; Müller, Birgit; Bierlich, Jörg; Bartelt, Hartmut; Jäger, Matthias
We report on the development of large-core Yb-doped fibers with up to 100 µm core diameter and present first experimental results for high peak power amplification. The material for core and pump cladding was fabricated by Powder Sinter Technology. Using a high Al concentration we achieved a numerical aperture (NA) of 0.21 of the pump cladding and a core NA below 0.1. The rod-type fiber exhibits high pump absorption. Using a 0.55 m short fiber sample as the main amplifier in a 3-stage ns pulsed fiber Master Oscillator Power Amplifier system we achieved 3 ns output pulses with 360 kW peak power and 2 mJ pulse energy. We observed suppressed Stimulated Raman Scattering with respect to the signal pulses, which offers the possibility of further power scaling of such fiber amplifier systems.

DOI: Array

Third party cookies & scripts

This site uses cookies. For optimal performance, smooth social media and promotional use, it is recommended that you agree to third party cookies and scripts. This may involve sharing information about your use of the third-party social media, advertising and analytics website.
For more information, see privacy policy and imprint.
Which cookies & scripts and the associated processing of your personal data do you agree with?

You can change your preferences anytime by visiting privacy policy.