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An N*N optical multiplexer using a planar arrangement of two star couplers

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1 Author(s)
Dragone, C. ; AT&T Bell Lab., Holmdel, NJ, USA

The author describes the design of an integrated N*N multiplexer capable of simultaneously multiplexing and demultiplexing a large number (up to about 50) of input and output wavelength channels. The multiplexer is a generalization of the 2*2 Mach-Zehnder multiplexer. It consists of two N*M star couplers connected by M paths of unequal length. Aberrations caused by mutual coupling in the waveguide arrays are minimized by a correction scheme that causes each star coupler to accurately perform a Fourier transformation. The multiplexer should be useful as a wavelength routing device for long haul and local area networks.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:3 ,  Issue: 9 )