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

TL;DR

This paper demonstrates that thin-film lithium tantalate modulators maintain stable electro-optic performance at high temperatures, making them suitable for uncooled optical applications.

Contribution

It provides experimental evidence of high-temperature stability and reduced Vπ in TFLT modulators, advancing their use in uncooled environments.

Findings

Electro-optic modulation remains unaffected up to 120°C.

DC-bias stability is maintained at high temperatures.

Vπ reduces by 10% at elevated temperatures.

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.