Optical fiber refractometer using narrowband cladding-mode resonance shifts.
Short-period fiber Bragg gratings with weakly tilted grating planes generate multiple strong resonances in transmission. Our experimental results show that the wavelength separation between selected resonances allows the measurement of the refractive index of the medium surrounding the fiber for values between 1.25 and 1.44 with an accuracy approaching 1x10(-4). The sensor element is 10 mm long and made from standard single-mode telecommunication grade optical fiber by ultraviolet light irradiation through a phase mask.
Chan
Chun-Fan
CF
Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, Canada.
Chen
Chengkun
C
Jafari
Amir
A
Laronche
Albane
A
Thomson
Douglas J
DJ
Albert
Jacques
J