In view of the deficiency of the conventional logging transmission systems

a fiber-optic transmission scheme for high-temperature logging information is designed.In the design

a low-power MCU of TI MSP series is employed as the processing chip of the down-hole monitoring system

high-temperature optical modules as the signal receiver and high temperature resistant optical fiber as the transmission media.The host computer can not only send commands to control down-hole drillers and sensors

but also display the logging information

e.g.temperature

pressure

resistance

etc.Experimental results show that this scheme can implement prolonged long-range broadband（up to 2 Mbit/s） transmission of logging information in high-temperature environment（110℃） and offer flexible way of expansion for the system so that it occupies still less room and becomes lighter.