Abstract
A interferometer–based router with single-stage all-pass filters in the arms has low loss, a flat passband, and low cross talk. However, we show that the router has substantial cubic dispersion over the channel passband, which is identical from channel to channel. For a router with a free spectral range of 100 GHz, the average dispersion slope over a 60% passband is , and thus a cascade of four routers incurs a significant system power penalty. A three-stage all-pass filter placed on the input arm reduces the dispersion of all channels by a factor of 16. The router is quite insensitive to variations in the all-pass filter design parameters.
© 2002 Optical Society of America
Full Article | PDF ArticleMore Like This
C. K. Madsen, G. Lenz, A. J. Bruce, M. A. Capuzzo, L. T. Gomez, T. N. Nielsen, and I. Brener
Opt. Lett. 24(22) 1555-1557 (1999)
C. K. Madsen
Opt. Lett. 25(12) 878-880 (2000)
Koichi Maru and Yukio Abe
Opt. Express 15(26) 18351-18356 (2007)