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Proceedings Paper

Transformation of elliptical beams by holographic diffractive optics recorded onto spherical substrates
Author(s): J. Pala; M. Miler; I. Aubrecht; M. Hradil
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Paper 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.

Paper Details

Date Published: 18 April 2006
PDF: 6 pages
Proc. SPIE 6180, Photonics, Devices, and Systems III, 61801D (18 April 2006); doi: 10.1117/12.675732
Show Author Affiliations
J. Pala, Institute of Radio Engineering and Electronics (Czech Republic)
M. Miler, Institute of Radio Engineering and Electronics (Czech Republic)
I. Aubrecht, Institute of Radio Engineering and Electronics (Czech Republic)
M. Hradil, Institute of Radio Engineering and Electronics (Czech Republic)

Published in SPIE Proceedings Vol. 6180:
Photonics, Devices, and Systems III
Pavel Tománek; Miroslav Hrabovský; Miroslav Miler; Dagmar Senderákova, Editor(s)

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