FIBER SENSOR OF TEMPERATURE FIELD DISTURBANCE |
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| Filip Dvořák, Jan Maschke, Čestmír Vlček |
- Abstract:
- The paper deals with effect of temperature field changes to the exposed length of polarization maintaining fiber (PMF). The change of output polarization state of propagating optical wave through the PMF were measured for input circular polarization which is invoking the excitation of both polarization states. This effect can be used to realization of sensor of temperature field disturbance, for example to detection of undesired person approach. To reach the maximal sensitivity of proposed sensor, the contemporary excitation of both polarization eigenmodes is required. The required excitation can be reached by means of input circular polarization or input linear polarization oriented 45° with respect to the polarization axes. The measuring of maximal changes of output intensity is reached for output polarizer oriented 45° with respect to the polarization axes. The measurement was realized for PM fibers with 633 nm and 1550 nm wavelengths. The aim was to verify the amount of influence on the exposed PM fiber length and the distance from fiber of heated subject invoking the temperature field disturbance in PM fiber. These relations can be used to propose the sensitive sensor system of temperature field disturbance and its arrangement. The examples of intensity relations for optical wave with 633 nm and sensor arrangement are presented in paper. The result relations of phase shift invoked by the temperature field disturbance for different exposed lengths and different distances from fiber are presented in paper. The sensitivity of PM fiber for wavelength 1550 nm was measured in the same arrangement and found out much smaller.
- Keywords:
- birefringence sensitivity, induced birefringence, temperature dependence, temperature sensor
- Download:
- IMEKO-TC2-2010-10.doc
- DOI:
- -
- Event details
- IMEKO TC:
- TC2
- Event name:
- TC2 Symposium 2010
- Title:
- 19th Symposium on Photonic Measurements
- Place:
- Hangzhou, CHINA
- Time:
- 11 September 2010 - 13 September 2010