18 April 2006 Transformation of elliptical beams by holographic diffractive optics recorded onto spherical substrates
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Proceedings Volume 6180, Photonics, Devices, and Systems III; 61801D (2006) https://doi.org/10.1117/12.675732
Event: Photonics, Devices, and Systems III, 2005, Prague, Czech Republic
Abstract
Elliptical outgoing beam is the main drawback of edge-emitting diode lasers, and for majority of their applications the elliptical beam needs to be transformed into another cross-sectional shape. Usually, a collimated circular beam with appropriate diameter is requested. Such a beam can be obtained in different ways, and this contribution deals with one of them - usage of off-axis holographic diffractive optics. Compensation for beam ellipticity from 1:2 for near infrared to 1:4 for visible spectra of the diode laser beam can be realized by holographic diffractive singlets recorded onto spherical substrate. Singlets employing for these ellipticities have to work in a strong off-axis mode with angles of diffraction reaching 75 deg. Theoretical analysis is presented and experimental results are given for reflection mode of operation.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Pala, J. Pala, M. Miler, M. Miler, I. Aubrecht, I. Aubrecht, M. Hradil, M. Hradil, } "Transformation of elliptical beams by holographic diffractive optics recorded onto spherical substrates", Proc. SPIE 6180, Photonics, Devices, and Systems III, 61801D (18 April 2006); doi: 10.1117/12.675732; https://doi.org/10.1117/12.675732
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