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Laurent Lombard on Muck Rack

Laurent Lombard

As seen in: Optica
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Articles

SBS mitigation by sinusoidal phase modulation of a 1572 nm all-fiber amplifier for lidar CO2 sensing

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By Julien Le Gouët, Pierre Pichon, Laurent Lombard, Université Paris Saclay
| Optica Verified
Lidar ${{\rm CO}_2}$ sensing can be performed by 1572 nm pulsed laser sources. This work presents the development of a fiber amplifier at this wavelength emitting 1 µs FWHM Gaussian pulses at a repetition rate of 7.5 kHz. We obtain the mitigation of stimulated Brillouin scattering (SBS) by shaping the seed laser spectrum into a frequency comb with sinusoidal phase modulation.
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Coherent combining of mid-infrared difference frequency generators

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By Alice Odier, Anne Durécu, Jean-Michel Melkonian, Laurent Lombard
| osapublishing.org
Abstract We report what is, to the best of our knowledge, the first experimental demonstration of coherent combining of two mid-infrared difference frequency generators by active phase control in the continuous-wave regime. Using the phase relation that is inherent to the nonlinear process, we are able to phase lock and combine the idler waves by the sole phase control of one of the pump waves. This control is done by an all-fiber electro-optic modulator.
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