  We report the first implementation of laser scanning Coherent Stokes Raman
scattering (CSRS - pronounced "sCiSsoRS") microscopy. To overcome the major
challenge in CSRS imaging, we show how to suppress the fluorescence background
by narrow bandpass filter and a lock-in based demodulation. Near background
free CSRS imaging of polymer beads, human skin, onion cells, avocado flesh and
the wing disc of a drosphila larva are presented. Finally, we explain and
demonstrate numerically that CSRS solves a major obstacle of other coherent
Raman techniques by sending a significant part (up to 100%) of the CSRS photons
into the backward direction under tight focusing conditions. We believe that
this discovery will pave the way for numerous technological advances, e.g. in
epi-detected coherent Raman multi-focus imaging, real-time laser scanning based
spectroscopy or efficient endoscopy.
