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Optical refractometer based on a birefringent Bragg grating written in an H-shaped fiber

2008; Optica Publishing Group; Volume: 34; Issue: 1 Linguagem: Inglês

10.1364/ol.34.000076

1539-4794

Orlando Frazão, Tadeusz Martynkien, J. M. Baptista, J. L. Santos, Wacław Urbańczyk, Jan Wójcik,

Photonic Crystal and Fiber Optics

An optical refractometer based on a birefringent (Hi-Bi) fiber Bragg grating (FBG) written in a new H-shaped fiber structure is proposed. This structure is formed by opening the two holes of a side-hole fiber using chemical etching. When the Hi-Bi FBG is immersed in different liquids, different responses of the slow and fast wavelengths are obtained. The refractometer is also capable of simultaneous measurement of refractive index and temperature.