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All figures (10)
Fig 2. Schematic of the DFB-LD with the OS seeding the pre-amplifier (TDFA1). The two boxes with right-directed arrows are optical isolators
Fig 6. CO2 (red) and H2O (blue) horizontal transmission for 2 km propagation through standard atmosphere. The white background represents the total laser spectral tuning.
Fig 7. Optical spectrum of the DFB-LD at the OS output.
Table 2: Laser-induced CNR loss/VMR bias budget
Fig 5. M2 estimation of laser beam at 120 µJ in two perpendicular directions. Laser beam is
Table 3. Parameters used for theoretical calculation of CNR
Table 1: Main laser features
Fig 4. Allan standard deviation (blue) of the beat note frequency calculated from a dataset of 5 minutes (plotted over 10 s to minimize the statistical error) and -1/2 slope (black, dashed) representing the stationary behavior. LO and signal are delayed by 1 km. σ: Allan standard deviation, ν0: beat note frequency
Fig 3. (a) Pulse shape at the TDFA4 output (blue) and Gaussian fit (red, dashed). (b) Beat note between the LO and the emitted pulse and (c) the PSD averaged over 200 shots. Δt: pulse duration at FWHM, Δν: spectral linewidth at FWHM, ν0: beat note center frequency
Fig 1: Schematic of the MOPFA. Energy values are given for 200 ns pulses at 20 kHz repetition rate. DFB-LD: Distributed Feedback Laser Diode, OS: Optical Switch, LO: Local Oscillator, TDFA: Thulium Doped Fiber Amplifier, AOM: Acousto-Optic Modulator, EOM: Electro-Optic Modulator, ASE: Amplified Spontaneous Emission, HR-FBG: High Reflectivity Fiber Bragg Grating, SBS: Stimulated Brillouin Scattering, LMA: Large Mode Area.
Journal Article
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DOI
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2.05-µm all-fiber laser source designed for CO 2 and wind coherent lidar measurement
[...]
Julien Lahyani
1
,
Julien Le Gouët
1
,
Fabien Gibert
2
,
Nicolas Cézard
3
•
Institutions (3)
Université Paris-Saclay
1
,
École Polytechnique
2
,
University of Toulouse
3
20 May 2021
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Applied Optics