Cao Wen-Hua, Wai Ping Kong A
Photonics Research Center and Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Hung Hom, Hong Kong.
Appl Opt. 2005 Dec 10;44(35):7611-20. doi: 10.1364/ao.44.007611.
Stable picosecond soliton transmission is demonstrated numerically by use of concatenated gain-distributed nonlinear amplifying fiber loop mirrors (NALMs). We show that, as compared with previous soliton transmission schemes that use conventional NALMs or nonlinear optical loop mirror and amplifier combinations, the present scheme permits a significant increase of loop-mirror (amplifier) spacing. The broad switching window of the present device and the high-quality pulses switched from it provide a reasonable stability range for soliton transmission. We also show that a soliton self-frequency shift can be suppressed by the gain-dispersion effect in the amplifying fiber loop and that soliton-soliton interactions can be partially reduced by using lowly dispersive transmission fibers.
利用级联增益分布型非线性放大光纤环镜（NALM），通过数值模拟证明了皮秒孤子的稳定传输。我们表明，与先前使用传统NALM或非线性光学环镜与放大器组合的孤子传输方案相比，本方案允许显著增加环镜（放大器）间距。本装置的宽开关窗口以及从中切换出的高质量脉冲为孤子传输提供了合理的稳定范围。我们还表明，放大光纤环中的增益色散效应可以抑制孤子自频移，并且使用低色散传输光纤可以部分减少孤子 - 孤子相互作用。
