Analysis on the Gaussian approximation of LP01 mode

Lianhuang Li; Fuyuan Guo

doi:10.1117/12.759646

4 January 2008 Analysis on the Gaussian approximation of LP₀₁ mode

Lianhuang Li, Fuyuan Guo

Proceedings Volume 6837, Information Optics and Photonics Technologies II; 68370D (2008) https://doi.org/10.1117/12.759646
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

A new method that the equivalent mode field radius can be acquired according to the equivalent matching efficiency method is presented and the equation of the equivalent mode field radius, which is based on the core layer radius, the normalized standing wave parameter and the normalized evanescent wave parameter, is given. Moreover, adopted computer numerical simulation, a mathematical modeling between the equivalent mode field radius and the normalized frequency of fiber is established. Based on this, the equation between the equivalent mode field radius and the normalized frequency is introduced by curve fitting method. The numerical calculation indicates that it has a higher precision. As for weakly guiding optical fiber, referred to the characteristic of the beam propagation factor of diffractive beam of LP₀₁ mode from its end surface, it was illuminated that the Gaussian approximation for the mode field distribution of LP₀₁ mode is rational. The characteristic of the field of the Gaussian approximation, which is based on the equivalent mode field radius, is analyzed. The difference between the eigen mode field of LP₀₁ mode and the field of its Gaussian approximation is discussed. From that, we can draw the conclusion that it is relatively accurate to adopt the equivalent matching efficiency method to obtain the equivalent mode field radius.

Citation Download Citation

Lianhuang Li and Fuyuan Guo "Analysis on the Gaussian approximation of LP₀₁ mode", Proc. SPIE 6837, Information Optics and Photonics Technologies II, 68370D (4 January 2008); https://doi.org/10.1117/12.759646

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