Folded Sub-1V Vπ Thin Film Lithium Niobate Phase Modulator
Date
2025-02-20
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE Photonics Technology Letters
Abstract
This work reports a sub-1 volt drive voltage (V π ) folded phase modulator utilizing capacitor-loaded traveling wave electrodes (CLTWEs). The implementation employs a low-loss CLTWE on a quartz (Qz) substrate, facilitating both broadband index matching and minimal RF loss. A series of phase modulators of varying lengths have been fabricated and subjected to experimental characterization. The measured loss for straight CLTWEs is 0.21 dB/(cm ⋅ GHz 1/2 ). The experimentally determined DC V π is 0.52 V for a modulation length of 7.5 cm.
Description
This article was originally published in IEEE Photonics Technology Letters. The version of record is available at: https://doi.org/10.1109/LPT.2025.3544127.
© 2025 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
Keywords
TFLN, phase modulator, CLTWE, low Vπ
Citation
X. Zhu et al., "Folded Sub-1V Vπ Thin Film Lithium Niobate Phase Modulator," in IEEE Photonics Technology Letters, vol. 37, no. 5, pp. 301-304, 1 March1, 2025, doi: 10.1109/LPT.2025.3544127.