Accurate optical fiber refractive index reconstruction from near field

Boucouvalas, Anthony C.; Thraskias, Christos Α.

doi:10.1109/csndsp.2008.4610756

Cited by 13 publications

(15 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4, the refractive index profiles solutions are similar to 'radial Bragg' type, with index oscillations in both real and imaginary parts but they are out of phase. We note that in all the following examples we use core radius r0 = 1.5μm and the electric fields correspond to the fundamental mode HE 11 .…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…Manuscript It is known that transverse transmission-line techniques can be applied in optical fibers with real refractive index profiles and can be used to fully characterize a waveguide by determining exactly the mode propagation constants [8], dispersion and cut-off wavelengths of waveguide modes [9]. Furthermore, it has also been shown that this method can in general be used to tackle inverse problems, for example, from knowledge of a desired mode electric field, one can even synthesize the exact real refractive index profiles numerically using this powerful technique [10], [11].…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Design of Arbitrary Modal Electric Field in Cylindrical Waveguides

Boucouvalas

Thraskias

2014

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

In this paper, we examine for the first time how to design arbitrary shape modal fields within complex refractive index circular waveguides. In order to achieve this flexibility in field shape, we use complex refractive index profile waveguides, where we determine the required refractive index profile on both real and imaginary refractive index. We develop a technique for calculating directly and accurately the refractive index profiles of cylindrical waveguides from knowledge of the desired modal electric field. The method we use to solve this inverse problem is via modeling the waveguide transversely as a transmission line. We demonstrate this algorithm with a number of example reconstructions of different arbitrary modal electric fields. The refractive index profiles generated supporting the required modal electric fields are complex. We reconstruct complex refractive index profiles which support unusual electric field distributions. We expect this technique to be useful in designing special fibers for mode matching between dissimilar waveguides, in designing sensing optical fibers, in mode division multiplexing, in gain flattening optical fiber amplifiers, and also for high power optical fibers.

show abstract

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Design of Arbitrary Modal Electric Field in Cylindrical Waveguides

Boucouvalas

Thraskias

2014

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

show abstract

“…The authors propose a strategy that is based on the solution of a nonlinear nonself-adjoint eigenvalue problem corresponding to a system of weakly singular integral equations. The numerical approach introduced in [46] reconstructs the refractive index prole of a cylindrical waveguide from the knowledge of the corresponding near eld in the case of Maxwell system. The main idea of this technique is to reformulate the problem into a set of one-dimensional problems after dividing the optical waveguide into homogeneous cylindrical layers of a prescribed thickness.…”

Section: Introductionmentioning

confidence: 99%

Mathematical analysis and solution methodology for an inverse spectral problem arising in the design of optical waveguides

Barucq

Bekkey

Djellouli

2018

Inverse Problems in Science and Engineering

View full text Add to dashboard Cite

We analyze mathematically the problem of determining refractive index proles from some desired/measured guided waves propagating in optical bers. We establish the uniqueness of the solution of this inverse spectral problem assuming that only one guided mode is known. We then propose an iterative computational procedure for solving numerically the considered inverse spectral problem. Numerical results are presented to illustrate the potential of * corresponding author: rabia.djellouli@csun.edu 1 the proposed regularized Newton algorithm to eciently and accurately retrieve the refractive index proles even when the guided mode measurements are highly noisy.

show abstract

“…The transmission line (TL) method has great application to analyze waveguide structure having an arbitrary refractive index profile [1][2]. There is a large number of current research papers on application of the TL method of waveguide analysis [3][4][5][6][7][8][9][10][11]. The asymmetric waveguide is somewhat tough to analyze due to their asymmetric mode field profile.…”

Section: Introductionmentioning

confidence: 99%

Derivation of dispersion equation by using the equivalent transmission line method for the case of planar slab optical waveguide structure

Raghuwanshi

Kumar

2012

2012 International Conference on Optical Engineering (ICOE)

View full text Add to dashboard Cite

The symmetric/asymmetric planar slab waveguide is simplest waveguide structure to be analyzed. These waveguides are used in optical communication systems. In this paper we have derived the Eigenvalue equations by using the transmission line (TL) method for the case of symmetric/asymmetric planar slab waveguide structure. Earlier also the equations have been derived but no where the intermediate steps of the solution found by authors' knowledge. The derived results have been exactly matched with the existing results found in the literatures.

show abstract

Accurate optical fiber refractive index reconstruction from near field

Cited by 13 publications

References 6 publications

Design of Arbitrary Modal Electric Field in Cylindrical Waveguides

Design of Arbitrary Modal Electric Field in Cylindrical Waveguides

Mathematical analysis and solution methodology for an inverse spectral problem arising in the design of optical waveguides

Derivation of dispersion equation by using the equivalent transmission line method for the case of planar slab optical waveguide structure

Contact Info

Product

Resources

About