Mode switch based on electro-optic long-period waveguide grating in lithium niobate

Wei Jin; Kin Seng Chiang

doi:10.1364/OL.40.000237

Mode switch based on electro-optic long-period waveguide grating in lithium niobate

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Author(s)

Wei Jin
Kin Seng Chiang

Related Research Unit(s)

Department of Electrical Engineering

Detail(s)

Original language	English
Pages (from-to)	237-240
Journal / Publication	Optics Letters
Volume	40
Issue number	2
Online published	12 Jan 2015
Publication status	Published - 15 Jan 2015

Link(s)

DOI	DOI https://doi.org/10.1364/OL.40.000237 Final Published version
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Attachment(s)	Documents 5942869.pdf Post-print, 357 KB, PDF Publisher's Copyright Statement COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: © 2015 Optica Publishing Group. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84924243725&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(02fb11b1-1eea-4eca-9361-62fc354e47de).html

Abstract

We propose a mode switch based on an electro-optic long-period grating formed in a lithium-niobate (LN) two-mode waveguide. Our fabricated device consists of an 8 mm long grating in a proton-exchanged z-cut LN waveguide. At a driving voltage of 35 V, it can switch between the fundamental mode and the higher-order mode with a mode extinction ratio of -18 dB and a 3-dB bandwidth of ∼ 25 nm at the wavelength 1544 nm. The performance of the device is insensitive to temperature variations. The experimental results agree well with the simulation. This mode switch could find applications in reconfigurable mode-division-multiplexing systems.