Miniature high-sensitivity high-temperature fiber sensor with a dispersion compensation fiber-based interferometer

作者：Dong, Bo^*; Wei, Li; Zhou, Da-Peng

来源：Applied Optics, 2009, 48(33): 6466-6469.

DOI：10.1364/AO.48.006466

• FABRY-PEROT-INTERFEROMETER
• LASER SENSORS

A miniature high-sensitivity, high-temperature fiber sensor with an interferometer based on a bare small-core-diameter dispersion compensation fiber (DCF) is reported. The sensing head is a single-mode-fiber (SMF) DCF configuration formed by a 4 mm long bare DCF with one end connected to the SMF by a fusion splicing technique and the other end cleaved. Due to the large mode index difference and high thermo-optic coefficient induced by two dominative interference modes, a miniature high-temperature fiber sensor with a high sensitivity of 68.6 pm/degrees C is obtained by monitoring the wavelength shift of the interference spectrum. This type of sensor has the features of small size, high sensitivity, high stability, simple structure, and low cost.

• 出版日期2009-11-20