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Design of Few-Mode Fibers With Arbitrary and Flattened Differential Mode Delay

机译:任意平坦的差模延迟的几模光纤的设计

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This letter proposes the use of a refractive index profile with a graded core and a cladding trench for the design of few-mode fibers, aiming an arbitrary differential mode delay (DMD) flattened over the ${rm C}+{rm L}$ band. By optimizing the core grading exponent and the dimensioning of the trench, a deviation lower than 0.01 ps/km from a target DMD is observed over the investigated wavelength range. Additionally, it is found that the dimensioning of the trench is almost independent of the target DMD, thereby enabling the use of a simple design rule that guarantees a maximum DMD deviation of 1.8 ps/km for a DMD target between ${-}{200}$ and 200 ps/km.
机译:这封信建议使用具有渐变纤芯和包层沟槽的折射率分布图设计少模光纤,旨在将任意差模延迟(DMD)展平到 $ {rm C} + {rm L} $ 波段。通过优化纤芯渐变指数和沟槽尺寸,在研究的波长范围内,与目标DMD的偏差小于0.01 ps / km。此外,发现沟槽的尺寸几乎与目标DMD无关,从而能够使用简单的设计规则,该规则可确保DMD目标在 $ {-} {200} $ 和200 ps / km。

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