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Large N x N waveguide grating routers

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6 Author(s)
Bernasconi, P. ; Lucent Technol. Bell Labs., Holmdel, NJ, USA ; Doerr, C. ; Dragone, C. ; Cappuzzo, M.
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We show how the grating diffraction properties of a N/spl times/N waveguide grating router (WGR) can limit the size of N when the device operates with a unique set of N wavelengths as a strict-sense nonblocking N/spl times/N cross connect. We motivate why for large N, the N optical channels should be chosen equally spaced in wavelength and not in frequency. Two different approaches to increase N are presented. We report on results obtained in a 40/spl times/40 and a 80/spl times/80 WGR.

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Lightwave Technology, Journal of  (Volume:18 ,  Issue: 7 )