High-repetition-rate femtosecond-laser inscription of low-loss thermally stable waveguides in lithium niobate

Abstract

Optical-lattice-like waveguides were fabricated in a z-cut lithium niobate crystal by an 11-MHz-repetition-rate pulsed laser. Two simple approaches based on varying the inscribing pulse energy in accordance with the position of the tracks were implemented to enhance the inscription results. Low propagation losses were observed in the visible and near-infrared parts of the spectrum. The minimum losses of less than (0.4 ± 0.1) dB/cm and (3.5 ± 0.2) dB/cm for transverse electric and transverse magnetic polarized light, respectively, in the fundamental guiding mode at 1550nm were achieved after heat treatment at 350∘C for three hours, and were preserved up to 700∘C.

Publication DOI: https://doi.org/10.1007/s00339-019-2609-6
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Uncontrolled Keywords: Chemistry(all),Materials Science(all)
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://link.sp ... 0339-019-2609-6 (Publisher URL)
PURE Output Type: Article
Published Date: 2019-04-06
Accepted Date: 2019-04-02
Authors: Piromjitpong, Teerawat
Dubov, Mykhaylo ( 0000-0002-6764-683X)
Boscolo, Sonia ( 0000-0001-5388-2893)

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