Holographic Lens For 532 Nm In Photo-Thermo-Refractive Glass

Keywords

Complex holograms; Holographic optical elements; Laser beam control; Photo-thermo-refractive glass; Volume Bragg gratings

Abstract

Volume Bragg gratings (VBGs) recorded in photo-thermo-refractive (PTR) glass are extensively used for laser beam control applications. As planar holographic optical elements, VBGs operate in the entire spectral window of PTR glass transparency – from near UV, through visible, and up to IR spectral regions. However, complex holographic elements, e.g. lenses or curved mirrors, cannot be fabricated in conventional Ce3+ doped PTR glass for applications in the visible spectral region due to its photosensitivity being limited to the UV region. Recently developed PTR glass doped with Tb3+ ions demonstrated sensitivity to visible light. The photo-ionization involves two-step absorption of UV and visible photons via metastable levels of Tb3+. Holograms in this glass were recorded by simultaneous exposure to UV radiation from an LED and visible radiation of the second harmonic from a Nd:YAG laser at 532 nm. For the first time holographic lenses operating at 532 nm were demonstrated in PTR glass. This result paves the way for complex holographic optical elements for operation with high power visible lasers.

Publication Date

9-1-2018

Publication Title

Optics and Laser Technology

Volume

105

Number of Pages

264-267

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.optlastec.2018.02.038

Socpus ID

85044478801 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85044478801

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