| 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 | 01030 | |
| Number of page(s) | 4 | |
| Section | Joint CLRC/ILRC Session: New Lidar Technologies and Methods | |
| DOI | https://doi.org/10.1051/epjconf/202636201030 | |
| Published online | 09 April 2026 | |
https://doi.org/10.1051/epjconf/202636201030
1.65 µm Er:YAG hybrid fibered/bulk emitter for CH4 differential absorption lidar
Laboratoire de Météorologie Dynamique (LMD/IPSL), École polytechnique, Institut polytechnique de Paris, Sorbonne Université, École normale supérieure, PSL Research University, CNRS, École des Ponts, Palaiseau, France, E-mail:gibert@lmd.polytechnique.
Published online: 9 April 2026
Abstract
A new Differential Absorption Lidar (DIAL) for atmospheric methane (CH4) profile measurement is under development at LMD. The lidar emitter is a new hybrid fibered/bulk Er:YAG laser. Two Erbium doped fiber lasers at 1532 nm are used to pump an Er:YAG rod in a ring cavity. The pulsed laser is sequentially injection-seeded by 2 fiber coupled CW Distributed Feedback (DFB) laser diodes On and Off respectively in the center of the methane line triplet at 1645.55 nm and out of at 1645.3 nm. It delivers dual On/Off 8 mJ/ 300 ns pulses at a repetition frequency of 1 kHz but other configuration can also be chosen. In this paper, we will present the objectives of this work, describe the experimental set-up and the laser performances with respect to power efficiency, beam quality, spectral purity and stability.
© The Authors, published by EDP Sciences, 2026
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