Single ended Brillouin interaction-based distributed temperature sensor using a Faraday rotating mirror

A novel scheme for a Brillouin interaction based distributed sensor is described which increases the practical applicability of the system. The diagnostic apparatus of this sensor requires access to only one end of the sensing fiber while the use of a Faraday rotating mirror as a reflector at the distal end of the fiber renders the sensor signal immune from temporal fluctuations in the birefringence of the fiber.