  In the new era of Extremely Large Telescopes (ELTs) currently under
construction, challenging requirements drive spectrograph designs towards
techniques that efficiently use a facility's light collection power. Operating
in the single-mode (SM) regime, close to the diffraction limit, reduces the
footprint of the instrument compared to a conventional high-resolving power
spectrograph. The custom built injection fiber system with 3D-printed
micro-lenses on top of it for the replicable high-resolution exoplanet and
asteroseismology spectrograph at Subaru in combination with extreme adaptive
optics of SCExAO, proved its high efficiency in a lab environment, manifesting
up to ~77% of the theoretical predicted performance.
