Brillouin distributed type optical-fiber temperature sensor based on wide-spectrum light source

The utility model discloses a Brillouin distributed type optical-fiber temperature sensor based on a wide-spectrum light source in the technical field of optical fiber sensing. The technical scheme of the optical-fiber temperature sensor is as follow: the sensor comprises a semiconductor laser device LD, a pulse generator, an adjustable gain amplifier, an optical filter, a circulator, sensing optical fibers, a photoelectric detector, a power divider, an intensity measuring unit, a frequency counter, a signal extraction unit, a clock control unit and an information output display unit. The optical-fiber temperature sensor is advantageous in that: the provided sensor adopts direct modulation of the wide-spectrum light source and Rayleigh-Brillouin self-heterodyne detection at the same time, requirements on the line width of the light source are reduced, the light source having big output power is adopted, an external modulation unit is omitted, the system structure is simplified, system cost is reduced, and system performance is improved.