the present invention involves new , innovative optical fiber probes , applied for temperature measurement with a quick response time . this new type of probe is composed of an ir wave - guide , including the following : a wave - limiter ; a wave - splitter , an exponent / logarithm transfer , a logarithmic subtractive device , a self - adjustable wave - cutting device , and an opto - electric probe head . the probe quickly responds to temperature , 1 ms or less , then releases the data captured digitally . this invention , offering numerous possible widespread applications , could replace thermocouples and sensors utilized for contact and non - contact measurement , as well as become an ideal for standard temperature measurement . the dual - waves optical method and the digital technique of the optics are both applied to this invention . based on the above - mentioned , multi - functional fiber optical sensors , capable of measuring a variety of biological , chemical , and physical quantities , can be developed .