The mechanism of laser detonating is introduced. A LD pumped laser with fiber coupling output is demonstrated which can be used under the missile borne condition. The light absorption pumped by Nd∶YAG and Nd∶YVO4 is compared. The fluorescence distribution of the Nd∶YVO4 side-pumped by LD and the design of the fiber coupling lens are illustrated. The output pulse energy from the fiber is 177mJ and the pulse width is 198μs.