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As-S and As-Se based photonic band gap fiber for IR laser transmission

L. Brandon Shaw, Jasbinder S. Sanghera, Ishwar D. Aggarwal, and Frederic H. Kung

Open Access Open Access

Abstract

IR transmissive As-S glass and As-Se glass triangular photonic band gap fiber structures are theoretically modeled. The potential for propagation of air-guided modes in the defect regions of these fibers is demonstrated by the large out of plane two-dimensional photonic band gaps found in these structures. Fiber design for IR light propagation is discussed.

©2003 Optical Society of America

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Figures (4)
Fig. 1.
Fig. 1. Gap maps of (a) 40% (b) 60% (c) 75% and (d) 90% air fill As-S triangular hole pattern structure. Gap maps were generated by calculating the first 32 eigenvalues.

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Fig. 2.
Fig. 2. Gap maps of (a) 40% (b) 60% (c) 75% and (d) 90% air fill As-Se triangular hole pattern structure. Gap maps were generated by calculating the first 32 eigenvalues.

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Fig. 3.
Fig. 3. Graph of largest gap area vs. air fill % for As-S and As-Se triangular hole PBG fiber structures. Silica triangular hole PBG fiber structure gap areas are shown for comparison. Note the y-axis changes after the break at 75%-80% fill. Gap area is defined by the intersection of the air line and the band gap boundries as shown in the inset diagram.

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Fig. 4.
Fig. 4. Predicted bound fundamental mode for kΛ=10.6 in a 90% air fill As-S PBG fiber.

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Equations (2)

Equations on this page are rendered with MathJax. Learn more.

N PBG = ( β H 2 − β L 2 ) r c 2 4
N PBG = ( k 2 n 1 2 − β L 2 ) r c 2 4
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