activity
20042026
most citedImproved Measurement of the Hydrogen 1S - 2S Transition Frequency

430 citations · 1.6k across the 36 of their papers we have counts for

collaborators
Showing physics.opticsShow all

11 papers · 1 filter

physics.optics2023

A compact 20-pass thin-disk multipass amplifier stable against thermal lensing effects and delivering 330 mJ pulses with

Manuel Zeyen, Lukas Affolter, Marwan Abdou Ahmed +11

We report on an Yb:YAG thin-disk multipass amplifier delivering 50 ns long pulses at a central wavelength of 1030 nm with an energy of 330 mJ at a repetition rate of 100 Hz. The be…

physics.optics2023★ 1 cited

Injection-seeded high-power Yb:YAG thin-disk laser stabilized by the Pound-Drever-Hall method

Manuel Zeyen, Lukas Affolter, Marwan Abdou Ahmed +12

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 fr…

physics.optics2022★ 12 cited

Pound-Drever-Hall locking scheme free from Trojan operating points

Manuel Zeyen, Lukas Affolter, Marwan Abdou Ahmed +11

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 fr…

physics.optics2019

Compact 20-pass thin-disk amplifier insensitive to thermal lensing

M. Zeyen, A. Antognini, K. Kirch +8

We present a multi-pass amplifier which passively compensates for distortions of the spherical phase front occurring in the active medium. The design is based on the Fourier transf…

physics.optics2019★ 4 cited

Passive alignment stability and auto-alignment of multipass amplifiers based on Fourier transforms

Karsten Schuhmann, Klaus Kirch, Andreas Knecht +8

The stability properties of Fourier-based multipass amplifier to misalignments (tilts) of its optical components has been investigated. For this purpose, a method to quantify the s…

physics.optics2018★ 14 cited

Multi-pass amplifiers with self-compensation of the thermal lens

Karsten Schuhmann, Klaus Kirch, Miroslaw Marszalek +7

We present a novel architecture for a multi-pass amplifier based on a succession of optical Fourier transforms and short propagations that shows a superior stability for variations…