The invention relates to a coaxial
optical fiber-based temperature and stress dual-parameter
optical fiber sensor which is formed by sequentially connecting a single mode input
optical fiber, a first coaxial optical
fiber, an intermediate
single mode optical fiber, a second coaxial optical
fiber and a single mode output optical
fiber, wherein the single mode input optical fiber, the first coaxialoptical fiber and the intermediate
single mode optical fiber are sequentially welded to form a first sensing unit; and the intermediate
single mode optical fiber, the second coaxial optical fiber andthe single mode output optical fiber are sequentially welded to form a second sensing unit. The first coaxial optical fiber and the second coaxial optical fiber have different structural parameters, the first sensing unit and the second sensing unit have
resonance filtering spectrums with different wavelengths; and the two
resonance filtering spectrums have different sensitivities for two parameters, namely the temperature and the stress, thereby the dual-parameter optical
fiber sensor can be realized. The coaxial optical fiber-based temperature and stress dual-parameter optical
fiber sensor disclosed by the invention has the advantages of simple preparation process, low cost, compact structure, stable performance, easiness for integration with a standard single mode optical fiber
system,and the like.