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The field of exoplanet research is moving towards the detection andcharacterization of habitable planets. These exo-Earths can be easily foundaround low-mass stars by using either photometric transit or radial-velocity(RV) techniques. In the latter case the gain is twofold because the signalinduced by the planet of a given mass is higher due to the more favourableplanet-star mass ratio and because the habitable zone lies closer to the star.However, late-type stars emit mainly in the infrared (IR) wavelength range,which calls for IR instruments. SPIRou is a stable RV IR spectrographaddressing these ambitious scientific objectives. As with any otherspectrograph, calibration and drift monitoring is fundamental to achieve highprecision. Our goal was to build, test and finally operate aFabry-P\'erot-based RV-reference module able to provide the needed spectralinformation over the full wavelength range of SPIRou. We adapted the existingHARPS Fabry-P\'erot calibrator for operation in the IR domain. Aftermanufacturing and assembly, we characterized the FP RV-module in thelaboratory. We measured finesse, transmittance, and spectral flux of thesystem. The measured finesse value of F=12.8 corresponds perfectly to thetheoretical value. The total transmittance at peak is of the order of 0.5%,mainly limited by fibre-connectors and interfaces. Nevertheless, the providedflux is in line with the the requirements set by the SPIRou instrument. Onceinstalled on SPIRou, we will test the full spectral characteristics andstability of the RV-reference module. The goal will be to prove that the lineposition and shape stability of all lines is better than 0.3 m s$^{-1}$ betweentwo calibration sequences (typically 24 hours), such that the RV-referencemodule can be used to monitor instrumental drifts.

A new infrared Fabry-P\'erot-based radial-velocity-reference module for the SPIRou radial-velocity spectrograph