M. V. Parfenov, A. V. Tronev, I. V. Il'ichev, P. M. Agruzov, A. V. Shamray, “Redistribution of optical power in the arms of a waveguide <nobr>$Y$</nobr>-splitter under local external illumination of the lithium niobate substrate”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2020, Volume 46, Issue 1,Pages <nobr>8

This article is cited in 2 papers

Redistribution of optical power in the arms of a waveguide $Y$-splitter under local external illumination of the lithium niobate substrate

M. V. Parfenov^ab, A. V. Tronev^ac, I. V. Il'ichev^a, P. M. Agruzov^a, A. V. Shamray^a

^a Ioffe Institute, St. Petersburg
^b Peter the Great St. Petersburg Polytechnic University
^c St. Petersburg National Research University of Information Technologies, Mechanics and Optics

Abstract: Optical tuning of the splitting ratio in an integrated optical $Y$-branch on lithium niobate (LiNbO$_3$) substrate was investigated. Regions of an $Y$-branch susceptible to the external illumination were defined. Tuning of the splitting ratio in the range of 2% was experimentally demonstrated, which can be effectively used for improvement of Mach–Zehnder modulators extinction ratio.

Keywords: integrated optics, photorefractive effect, optical modulator, extinction ratio, $Y$-splitter.

Received: 16.09.2019
Revised: 16.09.2019
Accepted: 26.09.2019

DOI: 10.21883/PJTF.2020.01.48855.18040