Thesis

Demonstration of quantum enhanced LIDAR robust against classical jamming

Creator
Rights statement
Awarding institution
  • University of Strathclyde
Date of award
  • 2024
Thesis identifier
  • T17133
Person Identifier (Local)
  • 201965288
Qualification Level
Qualification Name
Department, School or Faculty
Abstract
  • This thesis systematically addresses two main objectives. The first part focuses on the creation of a high-brightness source of heralded single photons, essential for the development of an advanced LIDAR system. The second part is dedicated to the experimental development of a quantum-enhanced LIDAR, employing coincidence detection to effectively discriminate between signal photons and background level. In the initial sections, the focus is placed on the development of an Optical Frequency Comb Generator (OFCG) designed to produce high-efficiency, microsecond pulses optimised for photon generation through the Four Wave Mixing process. A new numerical model is introduced and utilised for the optimal design and refinement of the OFCG. The theoretical predictions of the model are validated by experimental realisations and comprehensive characterisation, confirming the anticipated efficiency and performance of the OFCG. The latter part of the thesis transitions to the development and assessment of the quantum-enhanced LIDAR. This system integrates a continuously pumped photon pair source with a simplified detection mechanism. It proves effective in operational environments characterised by a significant imbalance between signal and background level, with the presence of noise levels exceeding million counts per second while the returning signal was on the level of single counts per second. Target discrimination was successfully performed even with extremely low target reflectivity down to -52 dB. The LIDAR’s performance is thoroughly evaluated using a log-likelihood analysis framework, demonstrating robustness against various forms of classical jamming. It is capable of performing rangefinding measurement limited by the timing jitter of silicon-based room-temperature Single Photon Avalanche Detectors (SPADs).
Advisor / supervisor
  • Jeffers, John (Physicist)
  • Pritchard, Jonathan D.
Resource Type
DOI

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