ANALYSIS OF THE BOUND MODES IN OPTICAL D-FIBERS

ANÁLISIS DE LOS MODOS CONECTADOS EN FIBRAS ÓPTICAS TIPO D

Antonio R. Sapienza¹    Marcelo F. Guimarães²   

1 Electronics Engineering Department, Universidade do Estado do Rio de Janeiro (UERJ), a_sapienza@osite.com.br

2 Equipment Engineer, PETROBRAS, marcelo.guima@petrobras.com.br

RESUMEN

En este artículo una solución analítica de un guía de onda con un núcleo circular y del revestimiento ilimitado en la proximidad a un medio espacio dieléctrico se presenta. Este modelo se aplica a la fibra tipo D en proximidad cerrada a un plano. Los resultados explican las características de la birrefringencia de estas estructuras.

Los gráficos de algunos parámetros de la fibra se calculan en función de la frecuencia espacial normalizada.

Palabras clave: Fibra tipo D, formulación híbrida, modos TE y TM, estados de polarización Y y X del modo fundamental, teorema de la dualidad.

ABSTRACT

In this paper an analytical solution of a waveguide with a circular core and unbounded cladding in the proximity to a dielectric halfspace is presented. This model is applied to D-shaped fiber in closed proximity to a plane. The results account for the birefringence properties of these structures.

Graphics of some parameters of the fiber are calculated as a function of the normalized spatial frequency.

Keywords: D-shaped fiber, hybrid formulation, TE and TM modes, polarization-states Y and X of fundamental mode, duality theorem.

ACKNOWLEDGMENT

The authors are very grateful to Prof. Jose Ricardo Bergmann (CETUC/PUC/Rio de Janeiro) for his invaluable cooperation.

REFERENCES

[1] A.W. Snyder and J.D. Love. "Optical Waveguide Theory". Chapman and Hall. London. 1988.         [ Links ]

[2] D. Marcuse, J.D. Love and F. Ladoucer. "Vector modes of D-shaped fibers". IEE-Proceeding-J. Vol. 139. Nº 2, pp. 117-126. April 1992.         [ Links ]

[3] C. Vassalo. "Rigorous theory for modes of optical fibers with cladding limited by a plane". Electron Lett, Nº 22, pp. 944-945. 1986.         [ Links ]

[4] H.S. Al-Raweshidy, F.A. Muhammad, J.M. Senior, "Compensation for surface contamination with D-fiber sensor (Elsevier)". Sensor and Actuators B-40, pp. 59-63. 1997.         [ Links ]

[5] H.S. Al-Raweshidy, A.Bhatti, G. Murttaza. "Radio-over-fibre using D-fiber antenna". Optical & Laser Technology. Nº 33, pp. 145-151. 2001.         [ Links ]

[6] H.S. Al-Raweshidy, A.Bhatti, G. Murttaza. "D-fiber Antenna for Radio-over-fibre in Mobile Communication Systems". IEEE-VTC' 99, pp. 2795-2799. 1999.         [ Links ]

[7] F.A. Muhammad, G. Stewart. "Polarised finite-diference analysis of D-fiber and application for chemical sensing". International Journal of Optoelectronics. Vol. 7. Nº 6, pp. 705-721. 1992.         [ Links ]

[8] Siao-Min Tseng, Ssu-Pin Ma. "High-Performance Side-Polished Fibers and Applications as Liquid Crystal Clad Fiber Polarized". Journal of Light Wave Technology. Vol. 15, pp. 1554-1559. August 1997.         [ Links ]

[9] Shiao-Min Tseng, Chin-Lin Chen. "Side-polished fibers". Applied Optics. Vol. 31. Nº 18, pp. 3447. June 1992.         [ Links ]

[10] W. Johnstone, K. MacCallion, G. Fawcett. "Tunable in-line fiber-optic bandpass filter". Optics Letter. Vol. 19. Nº 8, pp. 542-544. April 1994.         [ Links ]

[11] W. Johnstone, G. Thursby, K. MacCallion, D. Moodie. "Fiber-optic refractometer that utilizes multimode waveguide overlay devices". Optics Letters. Vol. 17. Nº 21, pp. 1538-1540. November 1992.         [ Links ]

[12] W. Johnstone, G. Thursby, S. Murray, M. Gill, A. MacDnach, D. Moodie, B. Culshaw. "Fiber Optic Modulators using Active Multimode Waveguide Overlays". Electronics Letters. 23 rd. Vol. 27. Nº 11, pp. 894-896. May 1991.         [ Links ]

Recibido el 26 de julio de 2005, aceptado el 26 de julio de 2006