PURPOSE: To realize the highly efficient laser recording and optical communication by leading for transmission the beams which are not used for recording and given from the laser recording device to the fiber for the optical communication use.

CONSTITUTION: The beam width is increased by beam expander 8 for the beams given from gas laser 7 and then stopped down through lens 10 to be put into electroacoustic element 9. At the same time, the manuscript is read through manuscript reading device 11 and then processed when necessary by central process part CPU12 to be transmitted to mixer 15 via the synchronous signal given from synchronous detector 14 installed near sensitive drum 13. The carrier sent from high frequency oscillator 16 is modulated by the output of mixer 15 and then applied to element 9 via power amplifier 17. And then incident beams receive the optical modulating deflection according to the input high frequency voltage via element 9, and primary beam I1 necessary for memorization among the output is applied to drum 13 via mechanical beam tester 18 such as the rotary mirror or the like. Then the O-dimensional beam I0 which is not used for memorization is transferred to signal process circuit 21 via optical communication fiber 4.