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 μm have been determined experimentally. Data have been obtained on the effect of the modulation frequency Ω 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 Ω 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.

本文报告了 O 波段 (1260 – 1360 nm) 掺铋磷硅酸盐光纤放大器中的瞬态过程和串扰（交叉调制）。已通过实验确定了表征放大器在 1.23 μm 泵浦波长下的动态参数的时间。已获得有关10 Hz 至 1 MHz 范围内的一个通道的调制频率Ω对另一通道中的串扰强度的影响的数据。数据结合数值计算结果表明，在100 kHz 以上的调制频率Ω 下，掺 Bi 光纤放大器中的串扰是微不足道的。我们的结果表明，O 波段双掺杂光纤放大器在多通道高速数据传输系统的实际应用中具有潜在的吸引力。