Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Reflectometry Study of the Pyroelectric Effect on Proton-Exchange Channel Waveguides in Lithium Niobate

Version 1 : Received: 28 September 2021 / Approved: 1 October 2021 / Online: 1 October 2021 (15:52:40 CEST)

A peer-reviewed article of this Preprint also exists.

Ponomarev, R.; Konstantinov, Y.; Belokrylov, M.; Lobach, I.; Shevtsov, D. Reflectometry Study of the Pyroelectric Effect on Proton-Exchange Channel Waveguides in Lithium Niobate. Appl. Sci. 2021, 11, 9853. Ponomarev, R.; Konstantinov, Y.; Belokrylov, M.; Lobach, I.; Shevtsov, D. Reflectometry Study of the Pyroelectric Effect on Proton-Exchange Channel Waveguides in Lithium Niobate. Appl. Sci. 2021, 11, 9853.

Journal reference: Appl. Sci. 2021, 11, 9853
DOI: 10.3390/app11219853

Abstract

This work is devoted to the study of the pyroelectric effect on the qualities of optical waveguides formed in a lithium niobate crystal by proton exchange. In the present work, we investigated the cessation effect of the radiation channeling during thermocycling of Y-splitters samples. We examined the spectral dependence of optical losses on a wavelength using an optical spectrum analyzer. The results demonstrate that in the range of 1530–1570 nm, all wavelengths are suppressed equally. The optical reflectometry method in the frequency domain shows that the increase of optical losses is observed along the entire waveguide, but not only at the Y-distribution point, as supposed earlier.

Keywords

lithium niobate; modulator; channel waveguide; pyroelectric effect; OFDR

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