Laser Ranging in Air Utilizing Mode-Locking in Laser Cavities

Terra, Osama

doi:10.1109/lpt.2017.2758355

Cited by 10 publications

(1 citation statement)

References 15 publications

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“…Therefore, there are problems such as excessive error accumulation, high operating cost, and low efficiency. Laser ranging is the mainstream means of high-precision measurement on the ground because of its good laser direction, high brightness, and good coherence [5]. For example, the frequency modulated continuous wave (FMCW) ranging system can achieve a measurement accuracy of 2.6 micrometres in metre-level ranging [6], the emerging femtosecond optical frequency combs technology can achieve nanometre-level accuracy in metre-scale ranges [7][8][9][10][11].…”

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confidence: 99%

Design of variable frequency dual transponder system for fixed point ranging

Xiaoxu,

Zhaobin,

Jiacheng

et al. 2023

Electronics Letters

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Aiming at the problems of high system cost, complex ranging process, low ranging accuracy, and limited measurement distance in commonly used methods for ground fixed point distance measurement journals, a variable frequency microwave ranging system based on a dual transponder architecture is proposed in this letter. The system uses carrier dual transponder as an active forwarding architecture, utilizing the digital phase‐locked loop to obtain the high‐precision phase difference between two signals, and resolving the ambiguity through microwave frequency sweep within a certain range. The simulation results show that the system can quickly obtain the unambiguous distance between two fixed points, besides, driven by a high‐stability crystal oscillator, submillimetre accuracy can be achieved in km‐level ranging.

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