Title :
Germania-based core optical fibers
Author :
Dianov, Evgeny M. ; Mashinsky, Valery M.
Author_Institution :
Fiber Opt. Res. Center, Russian Acad. of Sci., Moscow, Russia
Abstract :
Germania-glass-based core silica glass cladding single-mode fibers (Δn up to 0.143) with a minimum loss of 20 dB/km at 1.9 μm were fabricated by the modified chemical vapor deposition (MCVD) method. The fibers exhibit strong photorefractivity with the type-IIa-induced refractive-index modulation of 2×10-3. The Raman gain of 300 to 59 dB/(km·W) was determined at 1.07 to 1.6 μm, respectively, in a 75 mol.% GeO2 core fiber. Only 3 m of such fibers are enough for the creation of a 10-W Raman laser at 1.12 μm with a 13-W pump at 1.07 μm. Raman generation in optical fiber at a wavelength of 2.2 μm was obtained for the first time.
Keywords :
Raman lasers; chemical vapour deposition; germanium compounds; optical fibre cladding; optical fibre fabrication; optical glass; optical pumping; photorefractive effect; refractive index; silicon compounds; 1.07 mum; 1.12 mum; 1.6 mum; 1.9 mum; 10 W; 13 W; 2.2 mum; GeO2; MCVD; Raman gain; Raman laser; SiO2; germania-glass-based core; modified chemical vapor deposition; photorefractivity; refractive-index modulation; silica glass cladding; single-mode fibers; Chemical vapor deposition; Fiber lasers; Glass; Optical fiber losses; Optical fibers; Optical refraction; Photorefractive effect; Pump lasers; Silicon compounds; Stimulated emission; Optical-fiber losses; Raman lasers; optical-fiber materials;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.855867
