| Issue |
EPJ Web Conf.
Volume 362, 2026
31st International Laser Radar Conference (ILRC 31) Held Together with the 22nd Coherent Laser Radar Conference (CLRC 22)
|
|
|---|---|---|
| Article Number | 06015 | |
| Number of page(s) | 3 | |
| Section | Joint CLRC/ILRC Session: Flux Measurements and Boundary Layer Dynamics | |
| DOI | https://doi.org/10.1051/epjconf/202636206015 | |
| Published online | 09 April 2026 | |
https://doi.org/10.1051/epjconf/202636206015
Cost-effective Fully Fiber-based DIAL Utilizing Wavelength Modulation for Laser Locking
(a) Photonics Laboratory, Physics Unit, Tampere University, Tampere, Finland
(b) Finnish Meteorological Institute Helsinki, Finland e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 9 April 2026
Abstract
Recent advancements in Differential Absorption Lidar (DIAL) technology have led to the adoption of fully fiber-optic DIAL systems, offering superior robustness, reduced alignment sensitivity, and enhanced portability compared to traditional bulk-optic systems. These systems excel in environmental monitoring, atmospheric research, and industrial safety. Central to their performance is the stabilization of the laser's frequency against environmental perturbations, crucial for pinpointing gas absorption peaks. This study introduces Wavelength Modulation Spectroscopy (WMS) for frequency stabilization in fully fiber-optic DIAL system, highlighting its simplicity and cost-effectiveness over conventional laser frequency-locking methods for applications where extreme precision is not mandatory. We present a compact, portable fiber-optic DIAL system designed for measuring CO2 concentrations with up to 10 ppm accuracy. The system ensuring laser wavelength stability below 140 MHz over several days, which contributes to the CO2 maximum absolute error detection of 0.5 ppm at narrow absorption peaks (half-width ~5 GHz).
© The Authors, published by EDP Sciences, 2026
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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