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arXiv · 2501.06768

Optical phase estimation via homodyne measurement in the presence of saturation effect of photodetectors

Jialin Li·Yazhi Niu·Lupei Qin·Xin-Qi Li
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Abstract

For optical phase estimation via homodyne measurement, we generalize the theory from detector's linear to nonlinear response regime, which accounts for the presence of saturation effect. For optical coherent light, we carry out analytic expressions for detector's current and estimate precision. Using specific device parameters, we illustrate the improved estimation after accounting for the saturation effect.

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Jialin Li, Yazhi Niu, Lupei Qin, Xin-Qi Li. 2025-01-12. Optical phase estimation via homodyne measurement in the presence of saturation effect of photodetectors. https://doi.org/10.1103/physreva.111.042629

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