Broadband chirped fibre Bragg filters for pump rejection and recycling in erbium doped fibre amplifiers

Abstract

Broadband chirped fibre Bragg filters centred at 980nm and 1480nm with reflectivities as high as 99% and reflection bandwidths up to 22nm are reported. The filters have a low transmission loss of <0.5 db between 1.51 and 1.56μm and their application to reject and recycle unabsorbed pump light from a fibre amplifier is demonstrated.