Randolf Pohl
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Explore the profile of Randolf Pohl including associated specialties, affiliations and a list of published articles.
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Articles
23
Citations
119
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Recent Articles
1.
Zeyen M, Affolter L, Abdou Ahmed M, Graf T, Kara O, Kirch K, et al.
Opt Express
. 2024 Feb;
32(2):1218-1230.
PMID: 38297678
We report on an Yb:YAG thin-disk multipass amplifier delivering 100 ns long pulses at a central wavelength of 1030 nm with an energy of 330 mJ at a repetition rate...
2.
Zeyen M, Affolter L, Abdou Ahmed M, Graf T, Kara O, Kirch K, et al.
Opt Express
. 2023 Sep;
31(18):29558-29572.
PMID: 37710753
We demonstrate an injection-seeded thin-disk Yb:YAG laser at 1030 nm, stabilized by the Pound-Drever-Hall (PDH) method. We modified the PDH scheme to obtain an error signal free from Trojan locking...
3.
Zeyen M, Affolter L, Abdou Ahmed M, Graf T, Kara O, Kirch K, et al.
Rev Sci Instrum
. 2023 Feb;
94(1):013001.
PMID: 36725577
The Pound-Drever-Hall (PDH) technique is a popular method for stabilizing the frequency of a laser to a stable optical resonator or, vice versa, the length of a resonator to the...
4.
Wirthl V, Maisenbacher L, Weitenberg J, Hertlein A, Grinin A, Matveev A, et al.
Opt Express
. 2022 Mar;
30(5):7340-7341.
PMID: 35299498
In Sec. 6 (polarization monitor) of our recent publication [Opt. Express29(5), 7024 (2021)10.1364/OE.417455], we assumed a small value of δ. This is however incorrect. The correct approximation for small β...
5.
Wirthl V, Maisenbacher L, Weitenberg J, Hertlein A, Grinin A, Matveev A, et al.
Opt Express
. 2021 Mar;
29(5):7024-7048.
PMID: 33726212
We present an improved active fiber-based retroreflector (AFR) providing high-quality wavefront-retracing anti-parallel laser beams in the near UV. We use our improved AFR for first-order Doppler-shift suppression in precision spectroscopy...
6.
Krauth J, Schuhmann K, Abdou Ahmed M, Amaro F, Amaro P, Biraben F, et al.
Nature
. 2021 Feb;
591(7850):E18.
PMID: 33640904
No abstract available.
7.
Krauth J, Schuhmann K, Abdou Ahmed M, Amaro F, Amaro P, Biraben F, et al.
Nature
. 2021 Jan;
589(7843):527-531.
PMID: 33505036
The energy levels of hydrogen-like atomic systems can be calculated with great precision. Starting from their quantum mechanical solution, they have been refined over the years to include the electron...
8.
Grinin A, Matveev A, Yost D, Maisenbacher L, Wirthl V, Pohl R, et al.
Science
. 2020 Nov;
370(6520):1061-1066.
PMID: 33243883
We have performed two-photon ultraviolet direct frequency comb spectroscopy on the 1S-3S transition in atomic hydrogen to illuminate the so-called proton radius puzzle and to demonstrate the potential of this...
9.
10.
Schuhmann K, Kirch K, Knecht A, Marszalek M, Nez F, Nuber J, et al.
Appl Opt
. 2019 May;
58(11):2904-2912.
PMID: 31044897
This study investigates the stability to tilts (misalignments) of Fourier-based multipass amplifiers, i.e., amplifiers where a Fourier transform is used to transport the beam from pass to pass. Here, the...