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Updated: Jun 13, 2026
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Narrow linewidth high output-coupling dual VBG-locked Yb-doped fiber laser
Pär Jelger1, Valdas Pasiskevicius, Fredrik Laurell
1Applied Physics, Royal Institute of Technology (KTH), Roslagstullbacken 21, 106 91 Stockholm, Sweden. pj@laserphysics.kth.se
Abstract:
Two equal highly reflective volume Bragg gratings (VBGs) were used to lock an Yb-doped fiber laser. By heating one of the VBGs, its center wavelength was shifted and the laser was locked on the overlap between the main peak of one grating and the side-lobe of the other creating a large outcoupling with high spectral selectivity. With this simple arrangement, unidirectional output is achieved with a narrow linewidth (<2.5 GHz), high efficiency (>70%) and with an output power above 7 W.
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