To make direct detection of planets like Proxima Centauri b possible, a high contrast coronagraph with a low inner-working angle is needed. With that in mind Por et al. designed the SCAR...Show moreTo make direct detection of planets like Proxima Centauri b possible, a high contrast coronagraph with a low inner-working angle is needed. With that in mind Por et al. designed the SCAR coronagraph. In SCAR the starlight is nulled using a SCAR phase plate and a single mode multicore fiber. In this thesis we describe the process of building a spectrograph for this instrument. After a small trade-off study, we have decided to build a prism spectrograph. Due to the proximity of the fibers, resolution increases in spite of bandwidth. The ultimate design has a resolution of 110 and a bandpass from 525 to 700 nm. The spectrograph was set-up and tested using a laser and a broadband source. The design induces a lot of crosstalk, therefore we used a special extraction method for the spectra described by Bolton and Schlegel. This technique creates a 2D model of the data and extracts accordingly. Finally we have been been able to retrieve spectra using this spectrograph and extraction method. This is a proof of concept for both the SCAR and the spectrograph behind it.Show less
