  We develop a theory for the total optical secondary emission from a 1D
interacting electron system modelled as a Tomonaga-Luttinger liquid. We
separate the emission into two parts which may originate in {\em hot
luminescence} (HL) and {\em Raman Scattering} (RS) respectively when we neglect
the {\em interference} effect. We find a peak around $\Delta \omega = v_f |q|$
in the RS part which does not come from a structure factor peak. In general the
total emission cannot be separated into HL and RS. However at resonance, and
taking into account the $k$ dependence of the optical matrix element, a part of
the RS is proportional to the structure factor $S(q_1-q_2, \omega_1-\omega_2)$.
