Abstract

This paper presents a modular optical implementation of a Banyan network by using the physical flexibility of the optical fiber to form the interconnections between compact switching stages based on bulk polarization optics. Specifically, these switching stages use total internal reflection (TIR) prisms with ferroelectric liquid crystal (FLC) polarization rotators to form compact modules. Using this Banyan network implementation, a reconfigurable multiwavelength add-drop filter for wavelength division multiplexed (WDM) applications is proposed. Experimental results for our fiber connected 2 in-2 out FLC-based bulk-optic switching stage gives a 6.7 dB optical insertion loss and a -40 dB optical interchannel crosstalk level. A low 2 dB optical insertion loss design number is expected with optimized components, realizing high (e.g., 35 s) switching speed and low crosstalk switching networks.

[IEEE ]

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Appl. Opt. (1)

J. Lightwave Technol. (4)

R. E. Wagner, R. C. Alferness, A. A. M. Saleh, and M. S. Goodman, "MONET: Multiwavelength optical networking," J. Lightwave Technol., vol. 14, pp. 1349-1355, June 1996.

G.-K. Chang, G. Ellinas, J. K. Gamelin, M. Z. Iqbal, and C. A. Brackett, "Multiwavelength reconfigurable WDM/ATM/SONET network testbed," J. Lightwave Technol., vol. 14, pp. 1320-1340, June 1996.

S. Johansson, "Transport network involving a reconfigurable WDM network layer--A European demonstration," J. Lightwave Technol., vol. 14, pp. 1341-1348, June 1996.

N. A. Riza and N. Madamopoulos, "Characterization of a ferroelectric liquid crystal-based time delay unit for phased array antenna applications," J. Lightwave Technol., vol. 15, pp. 1088-1094, July 1997.

Opt. Lett. (2)

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