Noise-Stationary Locking and Phase-Controlled Dark-Port Injection
Introduces the Noise-Stationary Locking (NSL) control concept — servoing an interferometer toward the operating point where a normalized measurement-band noise objective is stationary rather than where optical power is extremal — and the companion Phase-Controlled Dark-Port Injection (DPI) technique that turns the nominally dark port into a controlled channel for calibration, coding, and matched-filter recovery. Non-confidential treatment based on the PQSensing patent-pending math and control architecture (non-provisional filed).
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@techreport{peterson2025nsldpi,
title = {Noise-Stationary Locking and Phase-Controlled Dark-Port Injection},
author = {Jon Peterson},
institution = {Peterson Quantum Sensing, LLC},
year = {2025},
type = {White Paper},
version = {v1.0},
url = {https://www.pqsensing.com/assets/whitepapers/pqsensing-nsl-dpi-white-paper.pdf}
}