Holographic recording with a near-IR sensitive photopolymer system using a laser diode

Istvan Banyasz; Daniel-Joseph Lougnot; Colette Turck

doi:10.1117/12.205361

23 March 1995 Holographic recording with a near-IR sensitive photopolymer system using a laser diode

Istvan Banyasz, Daniel-Joseph Lougnot, Colette Turck

Proceedings Volume 2405, Holographic Materials; (1995) https://doi.org/10.1117/12.205361
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

Photopolymerizable formulations exhibiting a fair sensitivity in the near IR were developed. These materials were formulated of a mixture of acrylate multifunctional monomers and oligomers with an initiating system working through a photoredox process. Depending on the spectrum of the sensitizers, this system absorbs various laser lines in the red (Kr⁺ at 676, 752 and 799 nm or laser diode at (lambda) > 750 nm). In particular, it was holographed with a monomode laser diode emitting in the 780 nm region, and bright transmission gratings were obtained. Typically, an exposure of ca. 500 mJ/cm² is necessary to reach complete inactivation of the material and to produce gratings with diffraction efficiency exceeding 40% with a spatial frequency of 800 lines/mm. The quality of the holographic recording was studied by recording multiple series of holograms of a resolution test target. In addition, these materials that contain crosslinkable monomers and convert to a tridimensional network upon irradiation, show a self-processing character allowing storage of optical information in situ. The applicability of this material to real time holographic interferometry was demonstrated.

Citation Download Citation

Istvan Banyasz, Daniel-Joseph Lougnot, and Colette Turck "Holographic recording with a near-IR sensitive photopolymer system using a laser diode", Proc. SPIE 2405, Holographic Materials, (23 March 1995); https://doi.org/10.1117/12.205361

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