Title :
Optical fiber long period gratings with thin film overlays
Author :
James, S.W. ; Rees, N.D. ; Tatam, R.P. ; Ashwell, G.J.
Author_Institution :
Sch. of Eng., Cranfield Univ., UK
Abstract :
It has been shown that the central wavelengths of the attenuation bands seen in the transmission spectrum of a long period gratings (LPG) exhibit a dependence on both the thickness and refractive index of thin film overlay materials. The form of the wavelength shift has been discussed in qualitative terms, and is predicted by a simple model.
Keywords :
Langmuir-Blodgett films; diffraction gratings; fibre optic sensors; optical fibres; optical films; refractive index; LB film; Langmuir Blodgett films; attenuation bands; central wavelengths; long period gratings; model; optical fiber gratings; overlay film refractive index dependence; overlay film thickness dependence; thin film overlay materials; transmission spectrum; wavelength shift; Chemical sensors; Fiber gratings; Optical attenuators; Optical fiber sensors; Optical fibers; Optical films; Optical refraction; Optical sensors; Optical waveguides; Refractive index;
Conference_Titel :
Optical Fiber Sensors Conference Technical Digest, 2002. Ofs 2002, 15th
Conference_Location :
Portland, OR, USA
Print_ISBN :
0-7803-7289-1
DOI :
10.1109/OFS.2002.1000516
