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We demonstrate a novel Brillouin optical time domain analysis sensor deploying a polarization diversity technique which eliminates the need for polarization scrambling, providing measurements that are largely immune to the state of polarization of the probe wave and the pump pulses throughout the sensing fiber. This can be exploited to reduce the measurement time or can lead to an enhanced precision. Proof of concept experiments demonstrate a 651 Hz sampling rate with 1m resolution over a 930m sensing fiber.The authors wish to acknowledge the financial support from the Spanish Ministerio de Ciencia e Innovación through theproject TEC2010-20224-C02-01 and from the Universidad Pública de Navarra

Polarization diversity for Brillouin distributed fiber sensors based on a double orthogonal pump