Abstract
Precise displacement measurement is essential for engineering, industrial, and scientific purposes. Ultrafast laser techniques are preferred for real-time applications due to their single-shot measurement capability and high resolution. To create a high-performance and cost-effective system with less complexity, capable of achieving real-time measurement with high micrometer spatial resolution, we have used a picosecond pulsed laser at the telecommunication wavelength of 1.5 μm in combination with dispersive interferometry. The instantaneous frequency measurement took place using the time-stretch technique incorporating dispersion compensating fiber induced chirp. Results using a 7-picosecond laser at 1.5 μm with a 10 MHz repetition rate are presented. Frequency resolution of 401.20 MHz and precision of 8.25 MHz corresponding to 10.48 μm displacement accuracy are achieved.
Recommended Citation
B. Boroomandisorkhabi et al., "Picosecond Laser Ranging At 1.5 Μm Using Dispersive Interferometry," Results in Optics, vol. 19, article no. 100799, Elsevier, May 2025.
The definitive version is available at https://doi.org/10.1016/j.rio.2025.100799
Department(s)
Electrical and Computer Engineering
Publication Status
Open Access
Keywords and Phrases
Instantaneous frequency measurement; Laser ranging; Time-stretch
International Standard Serial Number (ISSN)
2666-9501
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
01 May 2025
