TY - GEN
T1 - Mechanically induced long period fiber gratings on single mode tapered optical fiber for structure sensing applications
AU - Pulido-Navarro, Mariá G.
AU - Marrujo-Garciá, Sigifredo
AU - Álvarez-Chávez, José A.
AU - Velázquez-González, Jesús S.
AU - Martínez-Pinõn, Fernando
AU - Escamilla-Ambrosio, Ponciano J.
N1 - Publisher Copyright:
© 2015 SPIE.
PY - 2015
Y1 - 2015
N2 - The modal characteristics of tapered single mode optical fibers and its strain sensing characteristics by using mechanically induced long period fiber gratings are presented in this work. Both Long Period Fiber Gratings (LPFG) and fiber tapers are fiber devices that couple light from the core fiber into the fiber cladding modes. The mechanical LPFG is made up of two plates, one flat and the other grooved. For this experiment the grooved plate was done on an acrylic slab with the help of a computer numerical control machine. The manufacturing of the tapered fiber is accomplished by applying heat using an oxygen-propane flame burner and stretching the fiber, which protective coating has been removed. Then, a polymer-tube-package is added in order to make the sensor sufficiently stiff for the tests. The mechanical induced LPFG is accomplished by putting the tapered fiber in between the two plates, so the taper acquires the form of the grooved plate slots. Using a laser beam the transmission spectrum showed a large peak transmission attenuation of around-20 dB. The resultant attenuation peak wavelength in the transmission spectrum shifts with changes in tension showing a strain sensitivity of 2pm/με . This reveals an improvement on the sensitivity for structure monitoring applications compared with the use of a standard optical fiber. In addition to the experimental work, the supporting theory and numerical simulation analysis are also included.
AB - The modal characteristics of tapered single mode optical fibers and its strain sensing characteristics by using mechanically induced long period fiber gratings are presented in this work. Both Long Period Fiber Gratings (LPFG) and fiber tapers are fiber devices that couple light from the core fiber into the fiber cladding modes. The mechanical LPFG is made up of two plates, one flat and the other grooved. For this experiment the grooved plate was done on an acrylic slab with the help of a computer numerical control machine. The manufacturing of the tapered fiber is accomplished by applying heat using an oxygen-propane flame burner and stretching the fiber, which protective coating has been removed. Then, a polymer-tube-package is added in order to make the sensor sufficiently stiff for the tests. The mechanical induced LPFG is accomplished by putting the tapered fiber in between the two plates, so the taper acquires the form of the grooved plate slots. Using a laser beam the transmission spectrum showed a large peak transmission attenuation of around-20 dB. The resultant attenuation peak wavelength in the transmission spectrum shifts with changes in tension showing a strain sensitivity of 2pm/με . This reveals an improvement on the sensitivity for structure monitoring applications compared with the use of a standard optical fiber. In addition to the experimental work, the supporting theory and numerical simulation analysis are also included.
KW - Optical sensors
KW - long period grating sensors
KW - mechanically induced gratings
KW - taper sensors
UR - http://www.scopus.com/inward/record.url?scp=84960885444&partnerID=8YFLogxK
U2 - 10.1117/12.2187339
DO - 10.1117/12.2187339
M3 - Contribución a la conferencia
AN - SCOPUS:84960885444
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Infrared Sensors, Devices, and Applications V
A2 - LeVan, Paul D.
A2 - Sood, Ashok K.
A2 - D'Souza, Arvind I.
A2 - Wijewarnasuriya, Priyalal
PB - SPIE
T2 - Infrared Sensors, Devices, and Applications V
Y2 - 12 August 2015 through 13 August 2015
ER -