Single-mode excitation of multimode fibers with ultrashort pulses.
Single-mode excitation of multimode fibers with ultrashort pulses.
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DOI：
10.1364/ol.23.000052
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发表时间：
1998
期刊：
影响因子：
3.6
通讯作者：
M. Fermann
中科院分区：
文献类型：
--
作者：
M. Fermann
演示了具有短时间相干长度的光源的阶跃折射率多模光纤的单模激发。描述了具有减少的微弯曲引起的模式耦合的多模光纤设计，即使在光纤紧密弯曲的情况下，也允许基模在长距离上传播，并且模式耦合可以忽略不计。在波长为 1.56 微米时，芯直径为 45 微米的光纤可以在约 20 m 的传播长度内保持基模。这种纤维允许以小至7cm的线圈直径卷绕。
Single-mode excitation of step-index multimode fibers with light sources with short temporal coherence lengths is demonstrated. Multimode fiber designs with reduced microbending-induced mode coupling are described that allow the propagation of the fundamental mode over long lengths with negligible mode coupling even in the presence of tight fiber bends. At a wavelength of 1.56microm a fiber with a core diameter of 45microm can preserve the fundamental mode for a propagation length of ~20m . Such fibers allow coiling with a coil diameter as small as 7cm.