Group delay in glass-fibre waveguide

Dyott, R.B.; Stern, J.R.

doi:10.1049/el:19710055

Cited by 38 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concept of zero total dispersion by cancellation of the material and waveguide dispersions was proposed as long ago as 1970 by Dyott and Stern [11]. The waveguide dispersion arises from the variation in group velocity.…”

Section: Solution Proceduresmentioning

confidence: 99%

Mode dispersion and delay characteristics of optical waveguides using equivalent TL circuits

Boucouvalas

Xiao

2005

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

Abstract-A new analysis leading to an exact and efficient algorithm is presented for calculating directly and without numerical differentiation the mode dispersion characteristics of cylindrical dielectric waveguides of arbitrary refractive-index profile. The new algorithm is based on the equivalent transmission-line (T-L) technique. From Maxwell's equations, we derive an equivalent T-L circuit for a cylindrical dielectric waveguide. Based on the TL-circuit model we derive exact analytic formulas for a recursive algorithm which allows direct calculation of mode delay and dispersion. We demonstrate this technique by calculating the fundamental mode dispersion for step, triangular, and linear chirp optical fiber refractive index profiles. The accuracy of the numerical results is also examined. The proposed algorithm computes dispersion directly from the propagation constant without the need for curve fitting and subsequent successive numerical differentiation. It is exact, rapidly convergent, and it results in savings for both storage memory and computing time.

show abstract

Section: Solution Proceduresmentioning

confidence: 99%

Mode dispersion and delay characteristics of optical waveguides using equivalent TL circuits

Boucouvalas

Xiao

2005

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

show abstract

“…(1), the effective delay t j takes into account both the material and the intramode dispersion. Allowance for the contribution of each type of dispersion to the effective delay and to the increase in the width of the cross-correlation function is useful for estimative calculations, but determination of their exact effect in separate is difficult [12,13]. Owing to this, we will use Eq.…”

Section: Compensation For the Unequal Dispersion In The Interferometementioning

confidence: 99%

Two-wavelength optical coherence tomography

Gelikonov

Feldchtein

2004

Radiophys Quantum Electron

View full text Add to dashboard Cite

681.787.7We present the results of studies of the basic principles and describe the design of a low-coherence two-wavelength interferometer based on polarization-maintaining fiber. The interferometer was developed for optical coherence tomography (OCT) imaging of the internal structure of living biological tissue simultaneously at two wavelengths, 830 and 1300 nm. Images of several sites of living biological tissue are presented and analyzed.

show abstract

“…As is well known, researchers have concentrated on circular and rectangular waveguides, and Chu [8] directed his attention to elliptic waveguides. Chu was followed by Dyott and Stern [9] who analyzed elliptic fibers. Later the propagation characteristics of optical fibers with elliptical cross sections and circular cross sections were investigated by numerous researchers.…”

Section: Introductionmentioning

confidence: 99%

Elliptical and Circular Step-Index Fibers With Conducting Helical Windings on the Core-Cladding Boundaries for Different Winding Pitch Angles - A Comparative Modal Dispersion Analysis

Kumar¹,

Singh²

2005

PIER

View full text Add to dashboard Cite

Abstract-The propagation characteristics of an elliptical step-index fiber with a conducting helical winding on the core-cladding boundary are investigated analytically and compared with those of a circular step index fiber with a conducting radial winding. Our optical waveguides are unconventional: in view of the existence of helical conducting windings on the core-cladding boundaries. Appropriate coordinate systems, circular cylindrical and elliptic cylindrical, are chosen for the circular and elliptical fibers. Applying the boundary conditions as modified by the presence of conducting helical windings, the characteristic equations are obtained for both the fibers. Dispersion curves are also obtained for two special values of the helical pitch angle ψ, namely, for ψ = 0 • and ψ = π 2 for each fiber and the results have been compared. It is found that the introduction of the helical winding has two main effects on the characteristics of both types of fibers. These are: (1) The helix introduces band gaps and (2) has the effect of splitting a mode into a pair of adjacent modes In the case of the elliptical helically clad waveguide we find two band gaps for V < 30 whereas for circular guide we have only one band gap in the same range of V -values, V being the normalized frequency parameter.

show abstract

Group delay in glass-fibre waveguide

Cited by 38 publications

References 0 publications

Mode dispersion and delay characteristics of optical waveguides using equivalent TL circuits

Mode dispersion and delay characteristics of optical waveguides using equivalent TL circuits

Two-wavelength optical coherence tomography

Elliptical and Circular Step-Index Fibers With Conducting Helical Windings on the Core-Cladding Boundaries for Different Winding Pitch Angles - A Comparative Modal Dispersion Analysis

Contact Info

Product

Resources

About