OPTICAL FIBER STRUCTURE AND A METHOD OF PRODUCING THEREOF

摘要

An optical waveguide (100) comprises a core (COR1), a buffer (BUF1) surrounding said core (COR1), and a cladding (CLD1) surrounding said buffer (BUF1), said core (COR1), said buffer (BUF1) and said cladding (CLD1) comprising silica glass, and the refractive index (nBU) of said buffer (BUF1) being substantially equal to the refractive index of pure amorphous silica glass. The buffer (BUF1) may reduce bubble formation during manufacturing and may facilitate splicing of the waveguide (100). The numerical aperture of the waveguide (100) may be fine-tuned by adjusting the radial dimension (b1) of the buffer (BUF1) in order to compensate variations in the refractive index (nCO) of the core (COR1).