  The usage of a GaAsP (gallium arsenide phosphide) photomultiplier for
microscopical imaging allows the evaluation of low-light luminescent objects.
We designed a setup for collecting a confocal microscopic image signal, which
is divided into 14 equal-sized input channels. The division is achieved with a
beamsplitter and two fiber bundles consisting of seven fibers each. Re-imaging
the confocal pinhole by such a densely packed fiber bundle permits the
utilization of a photon re-localization approach to overcome the optical
resolution limit. The center fiber creates a real-time image, while the outer
fibers enable a higher-resolution image via an image scanning microscope (ISM)
signal calculation. The fiber bundles are enclosed in a fused silica capillary
and are drawn out to create one solid fiber bundle. During the drawing process,
the fiber bundles are tapered down to an outer diameter size of 400 {\mu}m,
with each fiber having a less than 0.3 Airy unit diameter. For the
photomultiplier interface, all fibers of both fiber bundles are integrated into
a v-groove array, with each fiber representing a detection input, which is
followed by projection optics for imaging onto the multichannel detector. The
resulting confocal super-resolution microscope is suitable for the application
of time-correlated single photon counting (TCSPC) techniques such as
fluorescence lifetime imaging (FLIM), time-resolved anisotropy, or F\"orster
resonance energy transfer (FRET) imaging.
