After describing the principle of coherent Raman phonon occuration, the photo-produced stress distribution in detectors is estimated in some special conditions. A strong shock stress whth duratoin 10ns, amplitude 40.2 Kg/cm₂ may be produced on the surface of detectors, using two commercial YAG dye pulse lasers supplied only with 10KW source. The latent effects of some practical nonideal reasons on the photo-produced stress are analysed and discussed. The realizatoin is also reached that the energy expending of the damage effect resulting from the coherent Raman phonons is less than that of the same effect resulting from thermal effects.