Abstract: For improving the quality of laser-induced acoustic signals, the laser-induced acoustic signal transducer was designed, its design theory and structure was analyzed and depicted. Experimental system was built. The pulsed laser was focused into water inside the transducer and in the free field respectively. A hydrophone was used to receive the acoustic signal and convert it into electric signals, a oscilloscope was connected with the hydrophone to display the signals. Laser-induced acoustic signals produced in two different environments have been compared. The results are as follows: compared with laser-induced acoustic signal produced in free field, that produced in the transducer has improved in its qualities. Peak pressures are 3 times larger. Signal energy is more concentrated below 60 kHz. Radiation angle has been decreased to 13.2in 1m distance. Signal attenuation gets slower.