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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2023-90-12-111-117

УДК: 53.097

Suppression of residual amplitude modulation in Ti:LiNbO3 integrated optical waveguides by changing its topology

Shulepov V.A., Smirnova, A.V., Vdovkin M.E., Il'ichev I.V., Strigalev, V.E.

Full text on elibrary.ru

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Шулепов В.А., Смирнова А.В., Вдовкин М.Е., Ильичев И.В., Стригалев В.Е. Подавление паразитной амплитудной модуляции в титан-диффузных волноводах на кристалле ниобата лития путём модификации их топологии // Оптический журнал. 2023. Т. 90. № 12. С. 111–117. http://doi.org/10.17586/1023-5086-2023-90-12-111-117

 

Shulepov V.A., Smirnova A.V., Vdovkin M.E., Ilichev I.V., Strigalev V.E. Suppression of residual amplitude modulation in Ti:LiNbO3 integrated optical waveguides by changing its topology [ In Russian] // Opticheskii Zhurnal. 2023. V. 90. № 12. P. 111–117. http://doi.org/10.17586/1023-5086-2023-90-12-111-117

For citation (Journal of Optical Technology):
-
Abstract:

Subject of study. Residual amplitude modulation in Ti:LiNbO3 integrated optical waveguides. Aim of study. Suppression of residual amplitude modulation in Ti:LiNbO3 integrated optical waveguides by modified topology. Method. The waveguides topology modification consists in formation of a bend in the input and output sections, due to which angles are formed between the direction of radiation in the region of the phase modulator and in the region of the input and output ports, 3.47° and 1.43° respectively. Such angles do not exceed the optical radiation divergence angle, determined by the optical fiber numerical aperture. However, the optical radiation transmission possibility from the input fiber to any of the output fibers through the integrated optical circuit substrate, bypassing the optical waveguides, should be reduced. Main results. It has been found that the density of the residual amplitude modulation values in the boxplot increases during the formation of the waveguide bending at the input and output sections of the integrated optical circuit. Thus, the interquartile range of the residual amplitude modulation values almost halved from 0.077% to 0.043%, and the difference between the maximum and the minimum values almost halved from 0.161% to 0.095%. Practical significance. The obtained results can be used to improve the characteristics of fiber-optic gyroscopes and other devices that have a multifunctional integrated optical circuit based on Ti:LiNbO3 in the optical scheme.

Keywords:

fiber optic gyroscope, integrated optical circuit, residual amplitude modulation, fiber optic sensor system, interferometric fiber optic sensor

Acknowledgements:

the work was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation, State assignment No. 2019-0923.

OCIS codes: 250.3140, 250.4110, 250.4390, 130.3730, 130.4110

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