Mode-hop compensation for intracavity sensing via chip voltage in an external-cavity QCL

In this paper, we describe a technique to perform intracavity gas sensing by detecting changes in the QCL voltage. The influence of mode-hops is compensated by a data acquisition and processing based on a dual wavelength scanning. This allows to perform gas detection over the full cavity spectral range (1277 cm -1 - 1348 cm -1) without the use of a mode-hop free setup. First results of measurement of the CH4 absorption spectrum are presented.

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Physics [physics]

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https://hal.univ-reims.fr/hal-04647698

Submitted on : Wednesday, September 4, 2024-9:24:59 AM

Last modification on : Thursday, October 10, 2024-10:04:14 AM

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hal-04647698 , version 1 (04-09-2024)

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Attribution - NonCommercial - NoDerivatives

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HAL Id : hal-04647698 , version 1
DOI : 10.1007/s00340-022-07882-z

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Laurent Bizet, Raphael Vallon, Bertrand Parvitte, Gregory Maisons, Mathieu Carras, et al.. Mode-hop compensation for intracavity sensing via chip voltage in an external-cavity QCL. Applied Physics B - Laser and Optics, 2022, 128 (9), ⟨10.1007/s00340-022-07882-z⟩. ⟨hal-04647698⟩

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