We proposed and demonstrated an all-fiber broadband tunable filter, with “band-stop” characteristics using bending of a resonant coupling fiber. Unlike conventional step-index fiber bend-induced “low-pass” filtering, with this novel approach we are able to retain the “band-stop” filter characteristics and tune the long wavelength edge of the rejected spectral band whilst the short wavelength edge is fixed by fiber design. The fiber filter can be readily spliced to and integrated with high-power single mode output ytterbium- or thulium-doped fiber lasers to provide efficient filtering of four-wave-mixing and/or stimulated Raman scattering, as well as parasitic 1um lasing in erbium/ytterbium co-doped lasers.
All-fiber bandwidth tunable filter for high power fiber lasers
Fiber Lasers XVII: Technology and Systems ; 2020 ; San Francisco,California,United States
Proc. SPIE ; 11260
2020-02-21
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
All-fiber bandwidth tunable filter for high power fiber lasers
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