Chinese Optics Letters, 2015, 13 (3): 030501, Published Online: Sep. 25, 2018
Solving characteristic equation of orbital angular momentum modes in a ring fiber 
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Abstract
The characteristic equation of orbital angular momentum modes in a ring fiber is derived. By solving the equation with the graphical method, mode distribution in a ring fiber can be precisely determined for arbitrary fiber parameters without relying on simulation of the vector field. This will provide a useful method to determine the separation between quasi-degenerate modes in a ring fiber.
Yixiao Zhu, Fan Zhang. Solving characteristic equation of orbital angular momentum modes in a ring fiber[J]. Chinese Optics Letters, 2015, 13(3): 030501.
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