Abstract
The first monolithically integrated InGaAsP/InP active-passive 8 × 8 cross-connect is designed,
fabricated and demonstrated. The selection functionalities in the space and wavelength domain are implemented
simultaneously on a single chip. Eight broadband inputs connect to an array of 1 × 8 broadband space selection
switches. Wavelength domain selection is subsequently performed with an array of eight 8 × 8 gated cyclic
routers. The on-chip fan-outs and fan-ins allow the integration of 136 semiconductor optical amplifier gates and eight
cyclic routers within a chip area of 14.6 × 6.7 mm
$^{2}$
. Circuit connectivity is evaluated for the full range of paths with optical and electronic connections for 84%
of the paths in this first prototype. Good spectral uniformity for the cyclic routers and loss compensation from the
semiconductor optical amplifier gates allow for operation across a broad spectral range. Data routing studies are
performed for a representative range of paths to show optical signal to noise ratios of greater than
30 dB/0.1 nm. Dynamically reconfigurable routing is also demonstrated for four simultaneously routed
wavelengths. Switch rise and fall times are measured to be 3.8 and 3.2 ns respectively.
© 2013 IEEE
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