Title :
All optical encoder using optical delay
Author :
Schmid, Eric ; Oka, Toru ; Shikai, Masahiro ; Nakajima, Hajirne ; Takashima, Katsuyuki ; Usami, Teruo
Author_Institution :
Ind. Electron. & Syst. Lab., Mitsubishi Electr. Corp., Hyogo, Japan
Abstract :
A novel concept for an all optical absolute position encoder whose sensing unit uses only passive elements is presented. Optical delay fiber loops are used to multiplex sensing channels. The device can be interrogated from a distant location using a single optical fiber which can be several kilometers long. Absolute position encoding is achieved by analog modulation of light intensity with well studied multiple slit patterns
Keywords :
delays; encoding; fibre optic sensors; optical modulation; position control; position measurement; time division multiplexing; analog modulation; light intensity; multiple slit patterns; optical absolute position encoder; optical delay fiber loops; optical sensor; sensing channel multiplexing; time division multiplexing; Delay; Electromagnetic interference; Optical control; Optical coupling; Optical fiber couplers; Optical fibers; Optical modulation; Optical pulses; Optical sensors; Pulse modulation;
Conference_Titel :
SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers
Conference_Location :
Hokkaido
Print_ISBN :
0-7803-2781-0
DOI :
10.1109/SICE.1995.526654
