Sf. Collins et al., RANGING MEASUREMENTS OVER A 20 METER PATH USING AN INTENSITY-CHIRPED LASER-DIODE, Measurement science & technology, 5(6), 1994, pp. 753-755
An optical sensor has been developed and used to measure ranges of up
to 20 m with an accuracy of a few centimetres. The frequency modulated
continuous wave (FMCW) technique was employed in conjunction with an
intensity modulated laser diode and optical fibres.