BOSTON, June 25 -- Integrated Circuits (ICs) used in optical switches will represent a $ 5.4 billion market opportunity by 2006, according to Pioneer Consulting's latest report, "Optical Chips: Enabling Technologies and Markets from Semiconductors to MEMS, Nano-Optics and Photonic Crystals." According to the report, MEMS (micro electromechanical systems) chips, manufactured by companies such as Agilent, Silicon Light Machines, Network Photonics and Umachines, offer a clear challenge to semiconductor-based ICs in the small port count, optical switch market. 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