Transformation of elliptical beams by holographic diffractive optics recorded onto spherical substrates

J. Pala; M. Miler; I. Aubrecht; M. Hradil

doi:10.1117/12.675732

18 April 2006 Transformation of elliptical beams by holographic diffractive optics recorded onto spherical substrates

J. Pala, M. Miler, I. Aubrecht, M. Hradil

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.

Citation Download Citation

J. Pala, M. Miler, I. Aubrecht, and 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); https://doi.org/10.1117/12.675732

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