Transient Processes And Cross Talk In An O-Band Bismuth-Doped Fibre Amplifier

This paper reports on transient processes and cross talk (cross modulation) in an O-band (1260 - 1360 nm) bismuth-doped phosphosilicate fibre amplifier. Times characterising dynamic parameters of the amplifier at a pump wavelength of 1.23 mm have been determined experimentally. Data have been obtained on the effect of the modulation frequency W of one of the channels in the range 10 Hz to 1 MHz on the cross-talk intensity in another channel. The data, in combination with numerical calculation results, show that the cross talk in the Bi-doped fibre amplifier is insignificant at modulation frequencies W above 100 kHz. Our results demonstrate that O-band Bi-doped fibre amplifiers are potentially attractive for practical application in multichannel high-speed data transmission systems.