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arXiv · 2604.27285

Stable thin-film lithium tantalate modulators operating at high temperature for uncooled operation

Ayed Al Sayem·Shiekh Zia Uddin·Ting-Chen Hu·Alaric Tate·Mark Cappuzzo·Rose Kopf·Mark Earnshaw
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Abstract

We demonstrate stable operation of a thin-film lithium tantalate (TFLT) modulator at very high operating temperatures. We show that the electro-optic modulation and bandwidth of the TFLT modulators are not affected by high-temperature operation, and both waveguide and resonant modulators are DC-bias stable even at 120{\deg}C. At higher temperatures, we even observe 10% reduction of the V{\pi} of the modulator. Our results position TFLT modulators as a strong candidate for uncooled operation in co-packaged optics.

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Ayed Al Sayem, Shiekh Zia Uddin, Ting-Chen Hu, Alaric Tate, Mark Cappuzzo, Rose Kopf, Mark Earnshaw. 2026-04-30. Stable thin-film lithium tantalate modulators operating at high temperature for uncooled operation. https://arxiv.org/abs/2604.27285

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