Design of wideband dispersion compensating optical fiber device based on higher-order LP11 mode

Aditya Goel; J. L. Rana

doi:10.1117/12.392146

11 July 2000 Design of wideband dispersion compensating optical fiber device based on higher-order LP₁₁ mode

Aditya Goel, J. L. Rana

Proceedings Volume 4078, Optoelectronic Materials and Devices II; (2000) https://doi.org/10.1117/12.392146
Event: Photonics Taiwan, 2000, Taipei, Taiwan

Abstract

With the advent of erbium - doped fiber amplifers (EDFA), the fiber loss in the 1550 nm window can be easily compensated and the transmission distance extended even to few thousands of kms without the use of electronic regenerators. However, inorder to utilize the vast transmission capacity of the Single mode fiber, the positive chromatic dispersion exhibited by the existing standard single mode fibers remains to be the primary limitation. This development has motivated the researchers to find new techniques for compensating the positive dispersion of the existing single mode fiber network. It has been demonstrated that higher order modes exhibit large negative dispersion when operated closet o their cutoff wavelength. This negative dispersion can be used to compensate the positive chromatic dispersion of the existing single mode fiber. In this paper we discuss the issues related to the design and optimization of a passive device, dispersion compensating fiber (DCF), which is capable of compensating the chromatic dispersion of the existing fiber over a wide wavelength span from 1500 nm to 1600 nm. This wavelength range encompasses both the bandwidth of EDFA and the low attentuation window of single mode optical fiber. A finite element method (FEM) is used to calculate the dispersion characteristics of a single mode optical fiber with arbitrary refractive index profile. Computer simulations shows that an optimally designed dispersion compensating fiber can reduce the dispersion of standard fiber from 18.62 ps / km - nm to 0.45 ps / km - nm over the entire wavelength span, when it is added with the existing standard fiber in a ration of 20.56:1.

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Aditya Goel and J. L. Rana "Design of wideband dispersion compensating optical fiber device based on higher-order LP₁₁ mode", Proc. SPIE 4078, Optoelectronic Materials and Devices II, (11 July 2000); https://doi.org/10.1117/12.392146

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KEYWORDS

Dispersion

Optical amplifiers

Optical fibers

Single mode fibers

Cladding

Picosecond phenomena

Finite element methods

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