Salathé R P, Gilgen H, Bodmer G
Opt Lett. 1996 Jul 1;21(13):1006-8. doi: 10.1364/ol.21.001006.
A fiber-optical low-coherence ref lectometer has been used to probe a multicore fiber locally at a wavelength of 1.3 microm. This technique allows one to determine the group index of refraction of the modes in the multicore fiber with high accuracy. Light propagation that is due to noncoherent coupling of energy from one fiber core to adjacent cores through cladding modes can be distinguished quantitatively from light propagating in coherently coupled modes. Intercore coupling constants in the range of 0.6-2 mm(-1) have been evaluated for the coupled modes.
一种光纤低相干反射仪已被用于在1.3微米波长下对多芯光纤进行局部探测。该技术能够高精度地确定多芯光纤中模式的群折射率。通过包层模式，能量从一个光纤芯非相干耦合到相邻芯所导致的光传播，可以与相干耦合模式下传播的光进行定量区分。已对耦合模式评估了范围在0.6 - 2毫米⁻¹的芯间耦合常数。
