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Space switches are the fundamental elements in single plane and multi-plane optical interconnection networks. This paper proposes a heterogeneous implementation of optical space switches based on two gating elements, amplifiers such as Semiconductor Optical Amplifier (SOA) and modulators such as Mach-Zehnder modulators. The heterogeneous implementation has the advantage of being more power-efficient than a homogeneous implementation based only on SOAs and more scalable than a homogeneous implementation based only on modulator-based gates as the optical power loss can be compensated by the SOAs.
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