Honeycomb type polarization-maintaining photonic crystal fiber and temperature sensor

The invention discloses a honeycomb type polarization-maintaining photonic crystal fiber and an optical fiber temperature sensor. The honeycomb type polarization-maintaining photonic crystal fiber is characterized in that the optical fiber comprises a fiber core and a cladding; the fiber core is solid silicon dioxide; the cladding comprises solid silicon dioxide and honeycomb-shaped air holes which are annularly distributed, six honeycomb-shaped air holes form an air hole unit, three air hole units form an air hole cluster, and five air hole clusters are annularly distributed at intervals. The optical fiber temperature sensor is based on the honeycomb type polarization maintaining photonic crystal optical fiber and comprises an ASE light source module, a circulator, a polarizer, a compensation optical fiber, a sensing optical fiber and a reflecting film which are connected in sequence; the reflecting film is plated at the tail end of the sensing optical fiber and forms a temperature sensor probe with the sens