The feasibility of using an emitting diode (LED or laser diode) as both light transmitter and receiver in a single-fibre reflective sensor system has been demonstrated. This arrangement may be used for remote sensing of frequency coded variables and for sensor time-domain multiplexing.
Junichi KatoTakahashi MoriIchirou Yamaguchi
Nicholas IoannidesD. KalymniosI. W. Rogers
N. TankovskyI. NikolovK. BaernerIvan Buchvarov