Title :
High-efficiency, double-clad fiber coupler, cladding mode sensor using a tilted fiber Bragg grating
Author :
Baiad, M.D. ; Gagne, Mathieu ; De Montigny, E. ; Madore, W.J. ; Godbout, N. ; Boudoux, C. ; Kashyap, Rekha
Author_Institution :
Dept. of Electr. Eng., Polytech. de Montreal, Montreal, QC, Canada
fDate :
June 30 2013-July 4 2013
Abstract :
A high-efficiency sensor for reflected cladding modes generated by a tilted fiber Bragg grating (TFBG) is demonstrated using a double-clad fiber (DCF) coupler (DCFC). The specially designed DCFC is spliced to a reflective TFBG written into photosensitive single mode fiber, tapered to match the inner cladding diameter of the DCFC. The DCFC is made by tapering and fusing two double-clad fibers (DCF) together. The device is capable of capturing low and high order backward propagating cladding modes to allow each mode to be clearly discriminated. A new mode of operation for refractive index sensing of a surrounding medium is possible with this sensor.
Keywords :
Bragg gratings; fibre optic sensors; optical fibre cladding; optical fibre couplers; refractive index; DCF coupler; TFBG; cladding mode sensor; double-clad fiber coupler; high order backward propagating cladding modes; high-efficiency sensor; inner cladding diameter; photosensitive single mode fiber; reflected cladding modes; refractive index sensing; tilted fiber Bragg grating; Bragg gratings; Couplers; Optical fiber communication; Optical fiber couplers; Optical fiber sensors;
Conference_Titel :
OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching (OECC/PS), 2013 18th
Conference_Location :
Kyoto
