Measurement of Temperature and Microwave Power using Liquid Crystal/Optic Fiber Probes

Two electro-optical probes have been developed which make possible the measurement of microwave power density inside biological specimens or phantoms and the continuous monitoring of temperature of the specimen during exposure to microwaves. Several ranges are available for the temperature probe. The power probe is essentially isotropic in its sensitivity to different polarizations of the electric field. The temperature probe does not perturb the microwave field nor does it cause hot spots. The same optical and electronic unit is used for both probes. These two probes provide the capability for measurements of parameters which heretofore could not be made.