Optical fibre with fluorescent additive

Details Optical fibre with fluorescent additive Optical fibre with fluorescent additive

H - Electricity

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H01S 3/06 (2006.01) C03B 37/018 (2006.01) C03C 13/04 (2006.01) H01S 3/067 (2006.01) H01S 3/16 (2006.01)

Patent

CA 1327845

ABSTRACT An optical fibre for use in fibre lasers has the lasing additive, eg Er3+, concentrated in centre of the core. Preferably the core has an inner region which contains the additive and an outer region which is dopant free. The concentration of the dopant reduces the pump threshold for a laser and improves the gain performance for a given pump power. The fibre is conveniently made by MCVD. The use of Al2O3 in the inner zone appears to reduce loss of dopant during tube collapse.

580531

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