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Open AccessArticle

“Shutdown” of the Proton Exchange Channel Waveguide in the Phase Modulator under the Influence of the Pyroelectric Effect

1
Perm State National Research University, Solid State Physics Department, 614990 Perm, Russia
2
Perm Federal Research Center, Ural Branch of Russian Academy of Sciences, 614990 Perm, Russia
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(21), 4585; https://doi.org/10.3390/app9214585
Received: 20 September 2019 / Revised: 17 October 2019 / Accepted: 24 October 2019 / Published: 28 October 2019
It is shown that the termination of the channeling of the fundamental radiation mode in the waveguide can be observed upon heating of an optical integrated circuit based on proton exchange channel waveguides formed in a lithium niobate single crystal. This process is reversible, but restoration of waveguide performance takes tens of minutes. The effect of the waveguide disappearance is observed upon rapid heating (5 K/min) from a low temperature (minus 40 °C). This effect can lead to a temporary failure of navigation systems using fiber optic gyroscopes with modulators based on a lithium niobate crystal. View Full-Text
Keywords: channel waveguide; proton exchange; fundamental mode; pyroelectric effect; mobile charge; fiber optic gyroscope; phase modulator channel waveguide; proton exchange; fundamental mode; pyroelectric effect; mobile charge; fiber optic gyroscope; phase modulator
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Ponomarev, R.S.; Shevtsov, D.I.; Karnaushkin, P.V. “Shutdown” of the Proton Exchange Channel Waveguide in the Phase Modulator under the Influence of the Pyroelectric Effect. Appl. Sci. 2019, 9, 4585.

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