Saini Than Singh, Kumar Ajeet, Sinha Ravindra Kumar
Appl Opt. 2014 Nov 1;53(31):7246-51. doi: 10.1364/AO.53.007246.
A triangular-core large-mode-area photonic crystal fiber structure has been designed with lower bending loss. The design works on the principle of bend induced mode filtering. Effects of the design parameters have been numerically investigated using the full vectorial finite-element method. In order to improve the effective mode area of fundamental mode along with the differential bending loss, five down-doped material rods have been introduced in place of five air holes in cladding. The structure supports effective mode-area of fundamental mode as large as 794 μm with nominal bend loss of 0.064 dB/m at bend radius of 15 cm. This structure is able to suppress all unwanted nonlinear effects and can be a potential candidate for designing compact high power delivery devices.
一种具有较低弯曲损耗的三角形纤芯大模场面积光子晶体光纤结构已被设计出来。该设计基于弯曲诱导模式滤波原理。使用全矢量有限元方法对设计参数的影响进行了数值研究。为了提高基模的有效模场面积以及差分弯曲损耗，在包层中引入了五根低掺杂材料棒来替代五个空气孔。该结构支持基模的有效模场面积高达794μm，在弯曲半径为15 cm时标称弯曲损耗为0.064 dB/m。这种结构能够抑制所有不需要的非线性效应，并且可能是设计紧凑型高功率传输器件的潜在候选方案。
