The present invention provides a bowl stacking separation device and a method of stacking bowls using the bowl stacking separation device. The routing units input there into an optical signal outputted from either of the wavelength branching unit and the intra-office signal input unit via a first optical path group, and convert an input optical signal into a predetermined wavelength to thereby output a wavelength-converted optical signal to a second optical path group. The first photon is reflected off an object. The socket comprises a first retainer ring and a second retainer ring.