In different fields of science optical diagnostics is challenging because of small opical distance or low absorption coefficient. The aim of the suggested RESOURCE project is to develop a device for a miniature probing spectroscopy technique using hollow-core fibers (HCFs). Work supported by Energy for Climate (E4C) Center of Institut Polytechnique de Paris in 2025, provided a proof of concept, illustrating the possibility to develop a hollow-core fiber spectroscopy technique for miniature probing of plasma-produced species. The experiment on fiber-enhanced Raman spectroscopy has been performed in collaboration with group of David PAI (LPP). The aim of the Master thesis will be (i) to develop the scheme of the prototype of the micro-spectrometer; (ii) to learn how to sample for the conditions of air pollution sampling and for the conditions of plasma experiment; (iii) to make a list of the component to buy with the aim to build a prototype of the HCF spectrometer and to demonstrate a principal possibility of further development of the technique (PhD Thesis). This work is in collaboration with two laboratories: (i) GPPMM Group, XLIM Research Institute, Limoges develops and produces hollow cofe fibers of a new generation; (ii) Aeronautics and Astronautics, Massachusetts Institute of Technology, USA, is interested in using this technique in their plasma-assisted combustion platforms. Scientific visits to MIT will be included.