| Popis: |
Despite the excellent performance that has been demonstrated for Er 3+ -doped fiber amplifiers at 1.5 µ m, they have several shortcomings that remain concerns in practical applications. The efficiency, gain, and signal/noise ratio of three-level devices are quite sensitive to the magnitude and spectrum of the cross sections. These, in turn, depend on the glass composition used as host. We report an investigation which determined the relevant cross sections for a variety of glasses and used them to predict performance trends for fiber amplifiers. Glasses have been identified which have advantages over silica, particularly for pumping with AlGaAs diode lasers at 800 nm. |
