|
This
temperature sensor is based upon Chiral Photonics' chiral
grating technology. During the fabrication process a chiral
grating is produced which has a controlled dip in its
spectral transmission. The spectral position of this
transmission dip is a function of the temperature of the
grating.
The graph
show the results of computer controlled high-temperature
testing of a chiral grating. The temperature was monitored
using a thermocouple and the spectral position of the dip
using a Micron Optics fibre interrogator. In addition to
measuring the sensor in transmission the attachment of a
fibre end micro-mirror allows interrogation in reflection to
be conducted.
The graph
shows a temperature sensitivity of ~1.3nm/100oC.
This gives a temperature resolution using this measurement
instrument of ~0.4oC
and an accuracy of ~�1%. |
