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Abstract
We present an erratum concerning the repetition rate of the fs-laser system used for the inscription of the waveguides stated in our paper [Opt. Express 28, 12011 (2020) [CrossRef] ]. The Fidelity HP High Energy laser supplied by Coherent Inc. features a repetition rate of 10 MHz instead of the value of 1 MHz stated in the paper.
© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
In our recent paper [1], we stated a wrong repetition rate of the laser system used for the inscription of the waveguide structures. The repetition rate is 10 MHz instead of the stated value of 1 MHz. Correspondingly, all pulse energies stated in the manuscript for structures inscribed with the Fidelity HP High Energy laser were too high by a factor of 10. Note that compared to the previously highest repetition rate of 1 MHz for fs-laser inscription of waveguides into any crystal [2] and the highest enabling waveguide laser operation of 0.5 MHz [3] our corrected result overcomes these values by an order of magnitude.
Funding
Deutsche Forschungsgemeinschaft (EXC 2056-project ID 390715994).
Acknowledgment
This work is supported by the Cluster of Excellence ‘Advanced Imaging of Matter’ of the Deutsche Forschungsgemeinschaft (DFG) - EXC 2056 - project ID 390715994.
Disclosures
The authors declare no conflicts of interest.
References
1. K. Hasse and C. Kränkel, “MHz-repetition rate fs-laser-inscribed crystalline waveguide lasers inscribed at 100 mm/s,” Opt. Express 28(8), 12011–12019 (2020). [CrossRef]
2. J. Siebenmorgen, “Herstellung von Wellenleiterlasern mittels Femtosekunden-Laserstrukturierung in Nd- und Yb-dotierten YAG-Kristallen,” PhD-thesis, Institut für Laserphysik, Universität Hamburg (2010).
3. Y. Tan, A. Ródenas, F. Chen, R. R. Thomson, A. K. Kar, D. Jaque, and Q. Lu, “70% slope efficiency from an ultrafast laser-written Nd:GdVO4 channel waveguide laser,” Opt. Express 18(24), 24994–24999 (2010). [CrossRef]