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Theoretical study and experimental fabrication of high negative dispersion photonic crystal fiber with large area mode field

Sigang Yang, Yejin Zhang, Xiaozhou Peng, Yang Lu, Shizhong Xie, Jinyan Li, Wei Chen, Zuowen Jiang, Jinggang Peng, and Haiqing Li

Open Access Open Access

Abstract

We present a systematic process of theoretical design and experimental fabrication of the large mode area and large negative dispersion photonic crystal fiber. An easily fabricated fiber structure is proposed. The influence of structure parameters deviations from the design on the chromatic dispersion are evaluated and a design rule is given. Finally our fabricated fiber and test results are demonstrated. The measured effective area of inner core mode is 40.7 μm2 which is the largest effective area of high negative dispersion photonic crystal fibers that have been experimentally fabricated. The measured peak dispersion is -666.2ps/(nm.km) and the bandwidth is 40nm.

©2006 Optical Society of America

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Figures (8)
Fig. 1.
Fig. 1. The dispersion of DCF proposed in reference [6] versus the radius of outer ring smaller holes.

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Fig. 2.
Fig. 2. Cross section of large mode area DCPCF

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Fig. 3.
Fig. 3. Chromatic dispersion of DCPCF versus wavelength

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Fig. 4.
Fig. 4. The chromatic dispersion versus holes diameter with the fixed lattice constant Λ=6.65μm and refractive index of doped inner core

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Fig. 5.
Fig. 5. The chromatic dispersion versus lattice constant with the fixed d/Λ=0.45

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Fig. 6.
Fig. 6. The chromatic dispersion versus the refractive index of doped inner core

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Fig. 7.
Fig. 7. (a) Microscope image of the experimentally drawing high negative dispersion photonic crystal fiber. (b) measured near field around phase matching wavelength displayed as density plot using Photon Kinetics 2500 Optical Fiber Analysis System.

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Fig. 8.
Fig. 8. Measurement results (a) the dots are the measured relative group delay values and the solid line is the fitting result. (b) the calculated spectral dispersion of the fiber according to the fitting relative group delay data.

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Equations (2)

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

D ( λ ) = − λ c d 2 n eff ( λ ) d λ 2
A eff = 2 π [ ∫ 0 ∞ I ( r ) rdr ] 2 I ( r ) 2 rdr
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