IR-to-visible image upconverter under nonlinear crystal thermal gradient operation | Zendy

Haroldo Maestre | Zendy; A. J. Torregrosa | Zendy; Carlos R. Fernández-Pousa | Zendy; J. Capmany | Zendy

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IR-to-visible image upconverter under nonlinear crystal thermal gradient operation

Author(s) -

Haroldo Maestre,

A. J. Torregrosa,

Carlos R. Fernández-Pousa,

J. Capmany

Publication year - 2018

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.001133

Subject(s) - optics , materials science , wavelength , crystal (programming language) , temperature gradient , infrared , thermal , numerical aperture , aperture (computer memory) , nonlinear optics , optoelectronics , physics , computer science , laser , quantum mechanics , meteorology , acoustics , programming language

In this work we study the enhancement of the field-of-view of an infrared image up-converter by means of a thermal gradient in a PPLN crystal. Our work focuses on compact upconverters, in which both a short PPLN crystal length and high numerical aperture lenses are employed. We found a qualitative increase in both wavelength and angular tolerances, compared to a constant temperature upconverter, which makes it necessary a correct IR wavelength allocation in order to effectively increase the up-converted area.

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