Title :
Use of highly overcoupled couplers to detect shifts in Bragg wavelength [strain sensors]
Author :
Zhang, Q. ; Brown, D.A. ; Kung, H. ; Townsend, J.E. ; Chen, M. ; Reinhart, L.J. ; Morse, T.F.
Author_Institution :
Div. of Eng., Brown Univ., Providence, RI, USA
fDate :
3/16/1995 12:00:00 AM
Abstract :
The authors present a technique for detecting Bragg wavelength shifts using highly overcoupled couplers (HOCC). An HOCC of 60%/nm was fabricated with 626 cycles. With our HOCC, a 5 μW LED and a 95% reflective Bragg grating we were able to detect 10 μstrain (Δλ=0.01 nm)
Keywords :
diffraction gratings; fibre optic sensors; optical fibre couplers; strain sensors; Bragg wavelength shifts; HOCC; LED; highly overcoupled couplers; reflective Bragg grating; strain sensors;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19950292
