High Power Single-Frequency 1762 nm Laser for Barium Ion Optical Qubits

Quantum processors based on ion traps (171Yb+, 88Sr+, 43Ca+ or 133Ba+) are one of the key components in the emergence of quantum technologies and have seen their interest explode in the last decade [1]. Although 171Yb+ ions are commonly used as qubits, a new alternative is based on 133Ba+ offering several key advantages in terms of lifetime, speed, fidelity and performance. The readout of the qubit is made by shelving the133Ba+ ion directly to the metastable 5D5/2 state using a 1762 nm single-frequency laser radiation [2]. For quantum computing and optical qubit manipulation low noise and high-power laser at this wavelength is highly recommended. Thulium doped fiber amplifiers (TDFAs) with broad emission between 1600–2100 nm and high-power capabilities are one of the best candidates for this application. Walasik et al demonstrated a 3W-1762 nm single-frequency TDFA but phase and intensity noise weren't investigated [3].

Authors

Germain Guiraud (ORCID: https://orcid.org/0000-0001-7821-0364)
G. Santarelli (ORCID: https://orcid.org/0000-0003-2219-2632)
Nicholas Traynor (ORCID: https://orcid.org/0000-0003-1843-6374)
Thomas Dubé
Saı̈d Hamdi
Kentin Poncelet
Coline Lavit

Institutions

Centre National de la Recherche Scientifique (FR)
Toptica Photonics (Germany) (DE)
Laboratoire Photonique, Numérique et Nanosciences (FR)

Publication Details

Published: 2025-06-23
DOI: https://doi.org/10.1109/cleo/europe-eqec65582.2025.11111367
Primary Topic: Quantum Information and Cryptography
Type: article
Field-Weighted Citation Impact: 0.00

High Power Single-Frequency 1762 nm Laser for Barium Ion Optical Qubits

Authors

Institutions

Publication Details

High Power Single-Frequency 1762 nm Laser for Barium Ion Optical Qubits

High Power Single-Frequency 1762 nm Laser for Barium Ion Optical Qubits

Abstract

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