Title :
High sensitivity sensors utilising characteristics of dispersion-turning-point of long-period gratings in B/Ge co-doped fibre
Author :
Xuewen Shu ; Lin Zhang ; Bennion, I.
Author_Institution :
Photonics Res. Group, Aston Univ., Birmingham, UK
Abstract :
Systematically investigated the waveguide dispersion characteristics of LPFGs. It has been revealed that the coupled cladding modes resonating in the dispersion-turning-point region are intrinsically sensitive to the external perturbation. Thus, LPFG-based application devices requiring good stability should avoid this region. On the other hand, this mode ultra-sensitive-zone can be explored to realise sensors and tuneable filters of high efficiency.
Keywords :
diffraction gratings; fibre optic sensors; optical fibre dispersion; optical fibre filters; LPFGs; coupled cladding modes; dispersion-turning-point; efficiency; external perturbation; long-period gratings; mode ultra-sensitive-zone; sensors; tuneable filters; waveguide dispersion characteristics; Capacitive sensors; Fiber gratings; Optical fiber devices; Optical fiber sensors; Optical frequency conversion; Optical refraction; Optical waveguides; Optoelectronic and photonic sensors; Sensor phenomena and characterization; Temperature sensors;
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.2002.1000806
