New EDFA pumping scheme insensitive to 980 nm diode lasers temperature variation

We present a novel EDFAs pumping scheme that uses two uncooled laser diodes emitting radiation at two different wavelengths. Due to the nearly triangular shape of the 980 nm absorption peak of Er doped fibers, the mean pump power absorbed by the active fiber doesn't change with the diode lasers wavelength variations induced by temperature. These pumping configuration permits to realize low cost temperature stabilized gain modules.