Luxtera's 100 Gigabit silicon photonics chip

Luxtera has detailed a 4x28 Gigabit optical transceiver chip. The silicon photonics company is aiming the device at embedded applications such as system backplanes and high-performance computing (HPC). The chip is also being used by Molex for 100 Gigabit active optical cables. Molex bought Luxtera's active optical cable business in January 2011.

“Do I want to invest in a copper backplane for a single generation or do I switch over now to optics and have a future-proof three-generation chassis?”  

Marek Tlalka, Luxtera

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UNIC silicon modulator

Kotura has detailed a compact, low-power silicon-based optical modulator; an important building block to enable dense on-chip optical interconnects. The modulator operates at up to 11Gbit/s, consumes 0.5mW and has an area of 1000µm².

This is the silicon photonic start-up’s first announced modulator. The design has been developed in conjunction with Sun Microsystems as part of the DAPRA Ultraperformance Nanophotonic Intrachip Communications (UNIC) programme.

An image of the modulator and a cross-section diagram of the ring waveguide. Source: Kotura

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