Sub-kHz linewidth integrated extended-DBR Pockels lasers using lithium tantalate
Abstract
Tunable low-noise lasers are crucial components employed in modern metrology. Advances in photonic integrated circuit technology have provided a new platform for compact integrated lasers with large output powers, frequency-agile tuning, and narrow linewidths. For instance, lithium niobate extended-DBR lasers can yield output powers in the tens of mW, GHz-level tuning ranges, and tuning rates in the hundreds of MHz. However, noise levels achievable in other integrated laser designs remain challenging to reach. Here, we address this challenge by implementing extended-DBR lasers in lithium tantalate, thereby achieving intrinsic linewidths as low as 24 Hz, output powers of 10 mW, with tuning features on par with those of lithium niobate. The extended-DBR laser is assembled with modern packaging solutions to improve its robustness and demonstrate long-term stability with a free-running frequency drift within a range of 232 MHz over 19 hours. These benefits, in conjunction with lithium tantalate's suitability for volume manufacturing, promise to considerably expand accessibility to a new generation of widely tunable and low-noise integrated lasers.
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BibTeX
@misc{larocque2026subkhz,
title = {{Sub-kHz linewidth integrated extended-DBR Pockels lasers using lithium tantalate}},
author = {Hugo Larocque and Zhuoya Yuan and Zihan Li and Giovanni Scarioni and Annika Schoels and Jiale Sun and Anat Siddharth and Xin Ou and Simone Bianconi and Tobias J. Kippenberg},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.14777},
eprint = {2609.14777},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.14777},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Sub-kHz linewidth integrated extended-DBR Pockels lasers using lithium tantalate
AU - Hugo Larocque
AU - Zhuoya Yuan
AU - Zihan Li
AU - Giovanni Scarioni
AU - Annika Schoels
AU - Jiale Sun
AU - Anat Siddharth
AU - Xin Ou
AU - Simone Bianconi
AU - Tobias J. Kippenberg
PY - 2026
DA - 2026/09/13
PB - arXiv
DO - 10.48550/arxiv.2609.14777
UR - https://arxiv.org/abs/2609.14777
AB - Tunable low-noise lasers are crucial components employed in modern metrology. Advances in photonic integrated circuit technology have provided a new platform for compact integrated lasers with large output powers, frequency-agile tuning, and narrow linewidths. For instance, lithium niobate extended-DBR lasers can yield output powers in the tens of mW, GHz-level tuning ranges, and tuning rates in the hundreds of MHz. However, noise levels achievable in other integrated laser designs remain challenging to reach. Here, we address this challenge by implementing extended-DBR lasers in lithium tantalate, thereby achieving intrinsic linewidths as low as 24 Hz, output powers of 10 mW, with tuning features on par with those of lithium niobate. The extended-DBR laser is assembled with modern packaging solutions to improve its robustness and demonstrate long-term stability with a free-running frequency drift within a range of 232 MHz over 19 hours. These benefits, in conjunction with lithium tantalate's suitability for volume manufacturing, promise to considerably expand accessibility to a new generation of widely tunable and low-noise integrated lasers.
ER -