Cross-talk fiber-optic temperature sensor.
The temperature sensitivity of cross talk between closely spaced cores in a common cladding is calculated and compared with measurements. A periodic variation in core contrast is observed when one core is illuminated and the temperature is changed. The variation in light distribution, which is ascribable to a change in coupling between the cores, agrees with theoretical predictions. It is shown that cross talk can be made to be a sensitive, predictable function of temperature or by proper selection of materials, wavelength, and fiber geometry essentially temperature independent.
Meltz
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United Technologies Research Center, East Hartford, Connecticut 06108, USA.
Dunphy
J R
JR
Morey
W W
WW
Snitzer
E
E