Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Investigating the dynamic behavior of thermal distortions of the wavefront in a high-power thin-disk laser using the moiré technique

Not Accessible

Your library or personal account may give you access

Abstract

We measure wavefront (WF) distortions in a high-power thin-disk laser induced simultaneously by the gas-lens/wedge and disk front-surface deformation using a two-channel moiré-based WF sensor. Thermal lensing and tilting effects are characterized versus time, their pressure-dependent fluctuations are quantified, and finally the corresponding pure disk front-surface effects are estimated for zero pressure. A divergent probe beam with a WF mean curvature similar to the curvature of the disk is reflected off the disk front surface. The temporal evolution of the WF at laser start-up is characterized using the WF sensor. A camera records both temporal evolution of the moiré fringe patterns and the intensity profile of the laser beam to have simultaneously both phase and intensity profiles of the laser beam. Successive WF data quantify the temporal evolutions of the dioptric power and induced wedges in two directions and their fluctuations during laser operation. We investigate the effect of air pressure on the produced gas-lens/wedge. The method is not sensitive to translational vibrations and is very low cost with adjustable sensitivity.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Composite Yb:YAG/sapphire thin-disk active elements for high-energy high-average power lasers

Ivan Kuznetsov, Alexey Pestov, Ivan Mukhin, Mikhail Volkov, Maria Zorina, Nikolay Chkhalo, and Oleg Palashov
Opt. Lett. 45(2) 387-390 (2020)

Ultrafast green thin-disk laser exceeding 1.4 kW of average power

Christoph Röcker, André Loescher, Florian Bienert, Philippe Villeval, Dominique Lupinski, Dominik Bauer, Alexander Killi, Thomas Graf, and Marwan Abdou Ahmed
Opt. Lett. 45(19) 5522-5525 (2020)

Adjustable and stable beam profile generation in a Yb:YAG thin-disk laser

Enmao Song, Tianrui Dai, Guangzhi Zhu, Hailin Wang, Kozlov Aleksei, and Xiao Zhu
Opt. Lett. 45(23) 6550-6553 (2020)

Supplementary Material (4)

NameDescription
Supplement 1       The paper’s high-resolution figures and an additional figure that presents a schematic representation of the use of Talbot interferometer as a wavefront sensor.
Visualization 1       Step by step illustration of the experimental setup for recording the temporal behavior of OPD specifications in a high-power thin-disk laser using a two-channel moiré-based wavefront sensor.
Visualization 2       Step by step visualization of extraction of the wavefront specifications from the frames of a movie captured from the moiré patterns.
Visualization 3       Demonstration of the extracting specifications of laser beam profile for different values of air pressure inside the resonator enclosure in order to analyze the effect of air pressure.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved