  We experimentally investigate the fluorescence photon emission
characteristics for single q-dots by using optical nanofibers. We demonstrate
that single q-dots can be deposited along an optical nanofiber systematically
and reproducibly with a precision of 5 {\mu}m. For single q-dots on an optical
nanofiber, we measure the fluorescence photon numbers coupled into the
nanofiber and the normalized photon correlations, by varying the excitation
laser intensity. We estimate the fluorescence photon coupling efficiency into
the nanofiber guided modes to be higher than 9.4\pm3%.
