  In the pursuit of realizing quantum optical networks, a large variety of
different approaches have been studied to achieve a single photon source
on-demand. The common goal for these approaches is to harvest all the emission
from a quantum emitter into a single spatial optical mode while maintaining a
high signal-to-noise ratio. In this work, we use a single nitrogen vacancy
center in diamond as a quantum emitter operating at ambient conditions and we
demonstrate an increased photon count rate up to a factor of 1.76 by placing a
silver mirror fabricated on the end facet of an optical fiber near the emitter.
