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Computer Optics, 2016, Volume 40, Issue 5, Pages 685–688
DOI: https://doi.org/10.18287/2412-6179-2016-40-5-685-688
(Mi co303)
 

OPTO-IT

Tunable diffraction grating with transparent indium-tin oxide electrodes on a lithium niobate X-cut crystal

V. D. Paranina, S. V. Karpeevba, K. N. Tukmakova, B. O. Volodkina

a Image Processing Systems Institute îf RAS, – Branch of the FSRC “Crystallography and Photonics” RAS, Samara, Russia
b Samara National Research University, Samara, Russia
References:
Abstract: A tunable diffraction grating based on an electrooptic X-cut lithium niobate crystal has been manufactured and experimentally analyzed. The period of electrodes is $290 \mu m$, the electrode width is $117.5 \mu m$, and the thickness of an electrode is 150 – 160 nm. The electrodes are made of a transparent conducting indium-tin oxide that serves as an antireflection coating with the aim of increasing the optical transmission. In order to prevent crystal polarization switching and electrical breakdown an optimized electrode topology with end ellipticity 1:1 and increased interelectrode gap is used.
The optical diagram of the tunable grating with alternating electrode potentials for various gap voltages is analyzed. The intensity of the zero order of diffraction is shown to decrease by 40 % at a voltage of $800 V$. At the same time, the origination of new diffraction orders at angles $\pm \lambda / (2d)$ is noted. The measurement of the forward-bias and reverse-bias regions of the modulation characteristic reveals the absence of hysteresis, which confirms the correctness of the electrode topology design.
Keywords: tunable diffraction grating, linear electro-optical effect, lithium niobate.
Funding agency Grant number
Russian Foundation for Basic Research 16-29-11698-ofi_m
14-02-97033-r_povolzhiye_a
The work was funded by the Russian Foundation for Basic Research (RFBR grants 16-29-11698 and 14-02-97033-r_povolzhiye_a).
Received: 30.09.2016
Accepted: 24.10.2016
Document Type: Article
Language: English
Citation: V. D. Paranin, S. V. Karpeev, K. N. Tukmakov, B. O. Volodkin, “Tunable diffraction grating with transparent indium-tin oxide electrodes on a lithium niobate X-cut crystal”, Computer Optics, 40:5 (2016), 685–688
Citation in format AMSBIB
\Bibitem{ParKarTuk16}
\by V.~D.~Paranin, S.~V.~Karpeev, K.~N.~Tukmakov, B.~O.~Volodkin
\paper Tunable diffraction grating with transparent indium-tin oxide electrodes on a lithium niobate X-cut crystal
\jour Computer Optics
\yr 2016
\vol 40
\issue 5
\pages 685--688
\mathnet{http://mi.mathnet.ru/co303}
\crossref{https://doi.org/10.18287/2412-6179-2016-40-5-685-688}
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    References:36
     
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