Generation of custom modes in a Nd:YAG laser with a semipassive bimorph adaptive mirror

Gerber, Michael; Graf, Thomas; Kudryashov, Alexis (2006). Generation of custom modes in a Nd:YAG laser with a semipassive bimorph adaptive mirror. Applied physics. B, Lasers and optics, 83(1), pp. 43-50. Heidelberg: Springer-Verlag 10.1007/s00340-005-2068-y

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Custom modes at a wavelength of 1064 nm were generated with a deformable mirror. The required surface deformations of the adaptive mirror were calculated with the Collins integral written in a matrix formalism. The appropriate size and shape of the actuators as well as the needed stroke were determined to ensure that the surface of the controllable mirror matches the phase front of the custom modes. A semipassive bimorph adaptive mirror with five concentric ring-shaped actuators and one defocus actuator was manufactured and characterised. The surface deformation was modelled with the response functions of the adaptive mirror in terms of an expansion with Zernike polynomials. In the experiments the Nd:YAG laser crystal was quasi-CW pumped to avoid thermally induced distortions of the phase front. The adaptive mirror allows to switch between a super-Gaussian mode, a doughnut mode, a Hermite-Gaussian fundamental beam, multi-mode operation or no oscillation in real time during laser operation.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Institute of Applied Physics

UniBE Contributor:

Gerber, Michael and Graf, Thomas

ISSN:

0946-2171

Publisher:

Springer-Verlag

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:47

Last Modified:

26 Jun 2018 13:19

Publisher DOI:

10.1007/s00340-005-2068-y

Web of Science ID:

000235746900009

BORIS DOI:

10.7892/boris.19529

URI:

https://boris.unibe.ch/id/eprint/19529 (FactScience: 2273)

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