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

Teerawat Piromjitpong*, Mykhaylo Dubov, Sonia Boscolo

*Corresponding author for this work

Research output: Contribution to journalArticle

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.

Original languageEnglish
Article number302
JournalApplied Physics A: Materials Science and Processing
Volume125
Issue number5
DOIs
Publication statusPublished - 6 Apr 2019

Bibliographical note

© 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.

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