Publikationen

Tunable dual-color operation of Yb:fiber laser via mechanical spectral subdivision

Autor(en)
Jakob Fellinger, Georg Winkler, Aline Mayer, Laurin Steidle, Oliver H. Heckl
Abstrakt

We present a versatile method to generate a dual-color laser from a single fiber laser cavity by spectral subdivision using a tunable mechanical filter. As a proof-of-principle, we implement the concept in a nonlinear polarization evolution (NPE)-mode-locked ytterbium (Yb)-fiber laser. The division into two independent spectral regions is achieved by inserting a narrow blade-shaped beam block into the free-space grating compressor section of the cavity, where the spectrum is spatially dispersed. By mode-locking both spectral regions, two pulse trains, with different repetition rates around 23 MHz, are generated. Each pulse train has a FWHM of ~10 nm. The method presented here enables tuning of the difference in repetition rate as well as the spectral separation of the two independent pulse trains. The difference in repetition rates originates from intracavity dispersion and can be tuned over a large range (650 Hz - 3 kHz in this setup) by changing the length of the grating compressor. By changing the effective width of the beam block the spectral separation can be dynamically adjusted. This approach’s simplicity holds great promises for the development of single-cavity dual-comb lasers featuring tunable sampling rates.

Organisation(en)
Fakultätszentrum für Nanostrukturforschung
Journal
Optics Express
Band
27
Seiten
5478-5486
Anzahl der Seiten
9
ISSN
1094-4087
DOI
https://doi.org/10.1364/OE.27.005478
Publikationsdatum
02-2019
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ÖFOS 2012
103016 Laserphysik, 103021 Optik, 103040 Photonik, 103008 Experimentalphysik
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/tunable-dualcolor-operation-of-ybfiber-laser-via-mechanical-spectral-subdivision(4e7e9525-ef7a-4e4c-aa1d-2424b1f3a102).html