Tunable Channel Dropping Optical Filter

L. Gutierrez, C. Ramirez, A. M. Guzmán, H. J. Kalinowski


The tunability for an optical notch filter by means of bending is studied. We consider a curved fourlayer slab waveguide as a model for a bent D-type singlemode optical fiber with a thin semiconductor film on its planar surface. We obtain characteristic transmission curves with minima at specific wavelengths, which can be shifted by varying the bending radius. In the limit of large curvature radius our results are in qualitative agreement with experimental results for straight filters.

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W. Johnstone, G. Thursby, D. Moodie R. Varshney and B. Culshaw, Fibre Optic Wavelength Channel Selector with high Resolution, Electron. Lett., 28(14), 13641365 (1992).

H. A. Haus, in Waves and Fields in Optoelectronics, Prentice Hall, Englewood Clifs, pp 99103 (1984).

Y. Cheng, W. Lin, Radiation Loss in Bent StepIndex

Slab Waveguides, Opt. Lett., 14, 12311233, (1989).

A. M. Guzmán and H. J.Kalinowski, Modeling of optical fiber sensors by beam propagation, Fiber Optics and Laser Sensors XI, Proc. SPIE 2070, 343351, (1994).

Y. Chung and N. Dagli, An Assessment of Finite Difference Beam Propagation Method, IEEE J. Quantum Electronics, 26(8), 13351338, (1990).

A.M. Guzmán, C. Ramírez and H. J. Kalinowski Numerical simulation of varying refractive index optical fiber sensors, Proceedings IEEE Latinamerican Conference, Santiago (Chile), pp 469 476, (1992).

C. Millar, M. Brierley and S. Mallison Exposed Core Single Mode Fiber Channel Dropping Filter Using a High Index Overlay Waveguide. Opt. Lett., 12(4), 284286, (1987).


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