Simultaneous strain and temperature measurement with long-period gratings.
The differential modulation of the attenuation bands in a long-period grating is used for simultaneous sensing of axial strain and temperature. A grating fabricated in a conventional optical fiber is demonstrated for concurrent measurements of strain over a range of 2100 micro? and temperature over a range of 125 degrees C, with maximum errors of 58 micro? and 1 degrees C, respectively.
Bhatia
V
V
Campbell
D
D
Claus
R O
RO
Vengsarkar
A M
AM