Influence of intermediate layer on transmission characteristics of W-type optical fibers

Influence of wavelength on the bandwidth of W-type plastic-clad silica optical fibers

“…The term α d in the expansion of α(θ) is dominant for higher-order modes. The coupling coefficient is usually assumed constant [12,[15][16][17]. The method of solving equation (1) and calculation of the bandwidth of W-type optical fibers is described in more detail in our previous work [18].…”

“…, where ∆ q = (n 0 − n q )/n 0 and ∆ p = (n 0 − n p )/n 0 , are leaky modes. The attenuation constants of leaky modes are given as [12,15]…”

“…(2) where k 0 is the free-space wave number, a is the core radius and δa is the width of the intermediate layer (inner cladding). The modal attenuation in a W-type fiber can be expressed as [12,15]…”

Analysis of graded-index optical fibers by the spectral parameter power series method

“…The dispersion represents one of the main impairments for optical communications. The study and the tailoring of different refractive index profiles aim at a desirable manipulation of the dispersion (as well as of several other transmission characteristics, e.g., [25,28,29]). Fibers with the dispersion parameter reduced at a certain wavelength, flattened for a wide range of wavelengths or even made highly negative are used for applications concerning long-haul communications, wavelength division multiplexing and dispersion compensation, among others (see, e.g., [3], [26, chapter 4]).…”