Optical refractometer based on a birefringent Bragg grating written in an H-shaped fiber.
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.
Frazão
O
O
INESC Porto, Porto, Portugal. ofrazao@inescporto.pt
Martynkien
T
T
Baptista
J M
JM
Santos
J L
JL
Urbanczyk
W
W
Wojcik
J
J