Optimizing the efficiency of femtosecond-laser-written holograms

Kristian Juncher Wædegaard; Henrik Dueholm Hansen; Peter Balling

doi:10.1007/s00340-013-5496-0

Optimizing the efficiency of femtosecond-laser-written holograms

Kristian Juncher Wædegaard, Henrik Dueholm Hansen, Peter Balling

Department of Physics and Astronomy

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

8 Citations (Scopus)

Abstract

Computer-generated binary holograms are written on a polished copper surface using single 800-nm, 120-fs pulses from a 1-kHz-repetition-rate laser system. The hologram efficiency (i.e. the power in the holographic reconstructed image relative to the incoming laser power) is investigated for different laser-structuring parameters. Theoretical diffraction grating efficiencies for a binary amplitude grating show good agreement with the experimental measurements for diameters of the laser-formed holes below the pitch. Modelling based on straightforward geometrical arguments is used to find the optimal hole size. For a coverage (i.e. relative laser-structured area) of ∼43 %, the efficiency reaches ∼10 %, which corresponds to a relative power transferred to one reconstructed image of ∼20 %. The efficiency as a function of pitch (for fixed coverage) is fairly constant from 2 to 6 μm.

Original language	English
Journal	Applied Physics B
Volume	113
Issue	3
Pages (from-to)	345-349
Number of pages	5
ISSN	0946-2171
DOIs	https://doi.org/10.1007/s00340-013-5496-0
Publication status	Published - Dec 2013

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Cite this

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title = "Optimizing the efficiency of femtosecond-laser-written holograms",

abstract = "Computer-generated binary holograms are written on a polished copper surface using single 800-nm, 120-fs pulses from a 1-kHz-repetition-rate laser system. The hologram efficiency (i.e. the power in the holographic reconstructed image relative to the incoming laser power) is investigated for different laser-structuring parameters. Theoretical diffraction grating efficiencies for a binary amplitude grating show good agreement with the experimental measurements for diameters of the laser-formed holes below the pitch. Modelling based on straightforward geometrical arguments is used to find the optimal hole size. For a coverage (i.e. relative laser-structured area) of ∼43 \%, the efficiency reaches ∼10 \%, which corresponds to a relative power transferred to one reconstructed image of ∼20 \%. The efficiency as a function of pitch (for fixed coverage) is fairly constant from 2 to 6 μm.",

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T1 - Optimizing the efficiency of femtosecond-laser-written holograms

AU - Wædegaard, Kristian Juncher

AU - Hansen, Henrik Dueholm

AU - Balling, Peter

N1 - The final publication is available at link.springer.com

PY - 2013/12

Y1 - 2013/12

N2 - Computer-generated binary holograms are written on a polished copper surface using single 800-nm, 120-fs pulses from a 1-kHz-repetition-rate laser system. The hologram efficiency (i.e. the power in the holographic reconstructed image relative to the incoming laser power) is investigated for different laser-structuring parameters. Theoretical diffraction grating efficiencies for a binary amplitude grating show good agreement with the experimental measurements for diameters of the laser-formed holes below the pitch. Modelling based on straightforward geometrical arguments is used to find the optimal hole size. For a coverage (i.e. relative laser-structured area) of ∼43 %, the efficiency reaches ∼10 %, which corresponds to a relative power transferred to one reconstructed image of ∼20 %. The efficiency as a function of pitch (for fixed coverage) is fairly constant from 2 to 6 μm.

AB - Computer-generated binary holograms are written on a polished copper surface using single 800-nm, 120-fs pulses from a 1-kHz-repetition-rate laser system. The hologram efficiency (i.e. the power in the holographic reconstructed image relative to the incoming laser power) is investigated for different laser-structuring parameters. Theoretical diffraction grating efficiencies for a binary amplitude grating show good agreement with the experimental measurements for diameters of the laser-formed holes below the pitch. Modelling based on straightforward geometrical arguments is used to find the optimal hole size. For a coverage (i.e. relative laser-structured area) of ∼43 %, the efficiency reaches ∼10 %, which corresponds to a relative power transferred to one reconstructed image of ∼20 %. The efficiency as a function of pitch (for fixed coverage) is fairly constant from 2 to 6 μm.

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DO - 10.1007/s00340-013-5496-0

M3 - Journal article

SN - 0946-2171

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JO - Applied Physics B

JF - Applied Physics B

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