Displacement Measurement using Time-stretch Microwave Photonics with Picosecond Laser Pulses
Abstract
Analyzing data and measuring microwave frequency and displacement with ultrafast lasers can be resource-intensive due to the substantial amount of data. As seen in current advanced techniques, achieving high resolution in both frequency and displacement necessitates using femtosecond or frequency comb lasers along with high-speed photodetectors. In this report, we designed a displacement measurement system using a picosecond laser source and an optical heterodyne detection transduction using dispersive elements to measure instantaneous frequency and displacement. A 140 MHz frequency resolution and a 1.02 MHz freuency precision corresponding to 3.56 μm displacement precision is achieved in measuring the instantaneous frequency of the interference signal, and consequently, the displacement of a mirror.
Recommended Citation
B. Boroomandisorkhabi and M. Esmaeelpour, "Displacement Measurement using Time-stretch Microwave Photonics with Picosecond Laser Pulses," Optics and Lasers in Engineering, vol. 186, article no. 108762, Elsevier, Mar 2025.
The definitive version is available at https://doi.org/10.1016/j.optlaseng.2024.108762
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Dispersive interferometry; Time-stretch; Ultrafast metrology
International Standard Serial Number (ISSN)
0143-8166
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
01 Mar 2025