  The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II
adaptive optics system and instrument suite with the goal of improving direct
imaging and high-resolution spectroscopic characterization capabilities for
giant exoplanets. KPIC Phase I includes a fiber injection unit (FIU) downstream
of a new pyramid wavefront sensor, coupling planet light to a single mode fiber
fed into NIRSPEC, Keck's high-resolution infrared spectrograph. This enables
high-dispersion spectroscopy (HDS) of directly imaged exoplanets at smaller
separation and higher contrast, improving our spectral characterization
capabilities for these objects. Here, we report performance results from the
KPIC Phase I FIU commissioning, including analysis of throughput, stability,
and sensitivity of the instrument.
