Abstract

BENITEZ-ALVAREZ, R.; MARTINEZ-PINON, F.  and  ORLOV, V. G.. A new method for actively tuning FBG’s to particular infrared wavelengths for oh emission lines suppression. Rev. mex. astron. astrofis [online]. 2019, vol.55, n.2, pp.351-361.  Epub Nov 25, 2020. ISSN 0185-1101.  https://doi.org/10.22201/ia.01851101p.2019.55.02.19.

This paper presents the conceptual design for a new method for the suppression of OH emission lines at near-infrared (NIR) wavelengths by actively adjusting the aperiodic fiber optic Bragg gratings tension. First, we prepared an experimental study in which we simulated an OH emission line using a semiconductor laser at 1548.43 nm and a commercial FBG, with a Bragg wavelength of 1547.76 nm. We demonstrated that the grating Bragg wavelength can be adjusted by controlling the linear deformation of the fiber with a force in the range of 0 to 53.88 gf (0.528 N) that provides a sensitivity of 0.014 nm g −1. Second, we proposed the design of a system connected to the telescope instrumentation, with the different stages that would allow monitoring the suppression of emission lines.

Keywords : atmospheric effects.

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