Paper
21 December 2023 Temperature-insensitive polarization mode converter based on thin-film periodically-poled lithium niobate
Author Affiliations +
Proceedings Volume 12966, AOPC 2023: AI in Optics and Photonics ; 129660V (2023) https://doi.org/10.1117/12.3006111
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China
Abstract
Periodically poled lithium niobate (PPLN) is a promising platform for realizing high-speed active polarization mode conversion. Especially, the development of thin-film PPLN techniques drives related devices to lower power consumption, higher performance and more integration. However, the wavelength shifting with the temperature variation is still a problem that brings instability and impedes modulation efficiency. In this paper, we first analyzed the temperature characteristics of a well-designed z-cut polarization mode converter based on thin-film PPLN. The simulated modulation voltage is smaller than 5V. Then a temperature-insensitive device was proposed with different coating materials of negative thermo-optic coefficients. Compared to the structure without coating, the wavelength shifting decreases from 0.25nm/°C to 0.07nm/°C, in the meantime, the modulation voltage can still be kept smaller than 5V or even be reduced slightly.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Ting Hao, Rongjin Zhuang, Jinlong Lu, Zhihao Li, Dennis Zhou, Guijun Ji, and Xinglong Wang "Temperature-insensitive polarization mode converter based on thin-film periodically-poled lithium niobate", Proc. SPIE 12966, AOPC 2023: AI in Optics and Photonics , 129660V (21 December 2023); https://doi.org/10.1117/12.3006111
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KEYWORDS
Coating

Lithium niobate

Polarization

Modulation

Thin films

Zinc oxide

Polarization control

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