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Dispersion Analysis Of The Photonic Crystal Fiber With Composite Hexangular Lattice

Posted on:2008-06-28Degree:MasterType:Thesis
Country:ChinaCandidate:L X GuoFull Text:PDF
GTID:2178360242969399Subject:Physical Electronics
Abstract/Summary:PDF Full Text Request
Since the conception of photonic crystal fibers was proposed by St. J. Russell in 1992, they soon attracted considerable attention due to the excellent properties that not exist in the conventional fibers. Among them, PCFs with nearly zero ultra-flattened dispersion properties have now been one of research areas in the optical communication field. They would be of great significance to the WDM optical communication system.In this paper, a new kind of PCFs with composite hexangular air hole lattice was proposed, its cladding consists of two different types of air holes arranging in composite hexangular. It's relatively simple in the structure and easily made. The dispersion of this PCF was analyzed using the full vector finite-difference frequency-domain (FDFD) method with anisotropic perfect matched layers. The rules of the influence on the dispersion of the hole pitch and two kinds of air-hole diameters were discussed in detail. The obtained results indicated that this PCF had nearly zero ultra-flattened dispersion properties within the optical communication window under the optimized parameters. As an example, the dispersion is 0±0.545ps/(km.nm) from the wavelength of 1.48μm to 1.78μm when the hole pitch, the small air hole diameter and the big air hole diameter are 2.1μm, 0.5μm, 0.8μm respectively.This paper's main contents are as follows:1. Surveys of photonic crystal fiber, especially, the photonic crystal fiber with nearly zero ultra-flattened dispersion properties, were given.2. The basic theory and the validation of the FDFD method as well as theapplication of the anisotropic perfect matched layers were introduced.3. The structure and the character of the PCF with composite hexangular air hole lattice were introduced.4. The dispersion properties of the PCF with composite hexangular air hole lattice were calculated, nearly zero ultra-flattened dispersion properties within the optical communication window under the optimized parameters were obtained.5. The results were summarized, and research direction of the PCF with composite hexangular air hole lattice was proposed.
Keywords/Search Tags:Dispersion, Nearly zero ultra-flattened dispersion, Photonic crystal fiber, Finite-difference frequency-domain (FDFD) method
PDF Full Text Request
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