FABRY-PEROT INTERFERENCE OPTICAL FIBER PRESSURE SENSOR FOR ELIMINATING TEMPERATURE INTERFERENCE, AND MANUFACTURING METHOD THEREFOR

A Fabry-Perot interference optical fiber pressure sensor for eliminating temperature interference. The sensor comprises an incident optical fiber, an optical fiber collimating sleeve (4) and a reflective quartz optical fiber (3), wherein the incident optical fiber and the reflective quartz optical fiber (3) are located in the optical fiber collimating sleeve (4); the incident optical fiber and the reflective quartz optical fiber (3) do not come in contact with each other, and form a first Fabry-Perot interference cavity; the incident optical fiber comprises an incident quartz optical fiber (1) and an N,O-carboxymethyl chitosan optical fiber (2); and the N,O-carboxymethyl chitosan optical fiber (2) comprises a fourth end face (13) and a fifth end face (14), and the fourth end face (13) and the fifth end face (14) form a second Fabry-Perot interference cavity. Two completely independent Fabry-Perot interference cavities are formed, the first Fabry-Perot interference cavity is used for detecting a pressure chang