Keck Planet Imager and Characterizer: a dedicated single-mode fiber injection unit for high-resolution exoplanet spectroscopy

The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument to demonstrate technological instrumental concepts initially developed for the exoplanet direct imaging field. Located downstream of current II adaptive optic (AO) system, KPIC contains fiber injection unit (FIU) capable combining high-contrast capability AOs system with high dispersion spectroscopy resolution infrared spectrograph (NIRSPEC). Deployed at in September 2018, this has already been used acquire high-resolution spectra (R > 30,000) multiple targets interest. In near term, it will be spectrally characterize known directly imaged exoplanets low-mass brown dwarf companions visible northern hemisphere spectral enough enable spin planetary radial velocity measurements as well Doppler atmospheric weather phenomena. Here, we present design FIU, unique calibration procedures needed operate single-mode performance.