Pith Number

pith:TLQMGUGU

pith:2026:TLQMGUGUEVD6ZGZAZDWTJKN6AT

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Robust and Active Visible-Light Integrated Photonics on Thin-Film Lithium Tantalate for Underwater Optical Wireless Communications

Changjian Guo, Jiajie Deng, Kaixuan Chen, Liu Liu, Sailing He, Weilong Ma, Wenchang Yang, Xiaofeng Wu, Xingjie Li, Ziliang Ruan

Thin-film lithium tantalate enables stable 50-GHz modulators at 532 nm for high-speed underwater optical links.

arxiv:2603.14346 v2 · 2026-03-15 · physics.optics

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Claims

C1strongest claim

thin-film lithium tantalate waveguides of propagation losses of dB/cm scale and modulators with a flat frequency response to ~50 GHz. The modulator remains stable when delivering 5 dBm modulated optical power for an hour... System-level underwater optical wireless communication (UWOC) is validated with 112-Gb/s transmission over 3-m and 64-Gb/s transmission over 9-m underwater links. This represents the first integrated external modulator based UWOC system.

C2weakest assumption

That the reported low losses, 50 GHz bandwidth, and one-hour stability at 5 dBm are reproducible across fabricated devices and that the 3 m and 9 m underwater links capture the dominant practical impairments without additional unstated losses or distortions.

C3one line summary

Thin-film lithium tantalate delivers stable 50 GHz modulators at 532 nm, supporting 112 Gb/s UWOC over 3 m and 64 Gb/s over 9 m underwater.

References

36 extracted · 36 resolved · 0 Pith anchors

[1] Lu, X. et al. Emerging integrated laser technologies in the visible and short near -infrared regimes. Nat. Photon. 18, 1010–1023 (2024) 2024

[2] Labonté, L. et al. Integrated photonics for quantum communications and metrology. PRX Quantum 5, 010101 (2024) 2024

[3] Xiong, J. et al. Augmented reality and virtual reality displays: emerging technologies and future perspectives. Light Sci. Appl. 10, 216 (2021) 2021

[4] Yu, H. et al. Dual -functional triangular-shape micro-size light-emitting and detecting diode for on -chip optical communication in the deep ultraviolet band. Laser Photonics Rev. 18, 2300789 (2024) 2024

[5] Desiatov B. et al. Ultra-low-loss integrated visible photonics using thin -film lithium niobate, Optica 6, 380-384 (2019) 2019

Formal links

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Cited by

1 paper in Pith

High bandwidth traveling wave electro-optic modulator at 1{\mu}m on thin-film lithium tantalate

Receipt and verification

First computed	2026-05-18T02:44:30.843024Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ae0c350d42547ec9b20c8ed34a9be04f0d65fe8983b5f92968c2ff19148441f

Aliases

arxiv: 2603.14346 · arxiv_version: 2603.14346v2 · doi: 10.48550/arxiv.2603.14346 · pith_short_12: TLQMGUGUEVD6 · pith_short_16: TLQMGUGUEVD6ZGZA · pith_short_8: TLQMGUGU

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/TLQMGUGUEVD6ZGZAZDWTJKN6AT \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9ae0c350d42547ec9b20c8ed34a9be04f0d65fe8983b5f92968c2ff19148441f

Canonical record JSON

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