title: Analytic solution of cut-off wavelength of bend-insensitive fibers based on frustrated total reflection.
abstract: An analytic method for solving the cut-off wavelength of single groove-assisted bend-insensitive fiber (BIF) was proposed. Combined with the concepts of frustrated total reflection and numerical aperture, the cut-off wavelength formula for the BIF was deduced. Experimental results showed that, compared to the traditional analytic and numeric methods, this method had higher accuracy in the calculation of cut-off wavelength for BIFs that had a large proportion of depressed inner-cladding layer, which significantly expanded the range of accurately predicting the cut-off wavelength.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Lin
authors.forename: Guobin
authors.initials: G
authors.lastname: Ren
authors.forename: Siwen
authors.initials: S
authors.lastname: Zheng
authors.forename: Wei
authors.initials: W
authors.lastname: Jian
authors.forename: Shuisheng
authors.initials: S
authors.lastname: Jian