Optical coherence and energy-level properties of a Tm3+ -doped LiNb O3 waveguide at subkelvin temperatures

Journal article (2021)

Authors

Neil Sinclair University of Calgary, California Institute of Technology, Harvard School of Engineering and Applied Sciences
Daniel Oblak University of Calgary
Erhan Saglamyurek University of Alberta, University of Calgary
Rufus L. Cone Montana State University - Bozeman
Charles W. Thiel Montana State University - Bozeman
W. Tittel QuTech Advanced Research Centre, QID/Tittel Lab - QuTech Advanced Research Centre , University of Calgary, Kavli institute of nanoscience Delft, Quantum Communications Lab - EEMCS
Research Group
QID/Tittel Lab (QuTech Advanced Research Centre) (TU Delft)
Copyright: © 2021 Neil Sinclair, Daniel Oblak, Erhan Saglamyurek, Rufus L. Cone, Charles W. Thiel, W. Tittel
DOI: https://doi.org/10.1103/PhysRevB.103.134105
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Published Date

2021

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Quantum Internet Division

Research Group

QID/Tittel Lab

Abstract

We characterize the optical coherence and energy-level properties of the 795-nm H63 to H43 transition of Tm3+ in a Ti4+:LiNbO3 waveguide at temperatures as low as 0.65 K. Coherence properties are measured with varied temperature, magnetic field, optical excitation power and wavelength, and measurement timescale. We also investigate nuclear spin-induced hyperfine structure and population dynamics with varying magnetic field and laser excitation power. Except for accountable differences due to different Ti4+- and Tm3+-doping concentrations, we find that the properties of Tm3+:Ti4+:LiNbO3 produced by indiffusion doping are consistent with those of a bulk-doped Tm3+:LiNbO3 crystal measured under similar conditions. Our results, which complement previous work in a narrower parameter space, support using rare-earth ions for integrated optical and quantum signal processing.