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  • Fujitsu Develops Si Photonics Light Source
Sep 2011
KAWASAKI, Japan, Sept. 26, 2011 — Fujitsu Laboratories has developed a compact silicon photonics light source that can be used in transceivers for optical interconnects capable of carrying huge volumes of data at high speeds between CPUs.

Optical transceiver in CPU module (Images: Fujitsu)

Fujitsu has removed the requirement for a thermal control mechanism through the launch of a technology that keeps the light source’s wavelength and the modulator’s operating wavelength in sync.

Transmitter component of the silicon photonics optical transceiver

This technology enables compact, low-power optical transceivers to be mounted directly in CPU packaging. Through its application to optical interconnects between CPUs for exaflops-class supercomputers and high-end servers, the company said, the technology paves the way for super-high-speed computers.

The light source is composed of a silicon mirror and a semiconductor optical amplifier. The silicon mirror includes a ring resonator and Bragg reflector, controlling the lasing wavelength. The sizes of the ring resonators introduced into both the light source and the optical modulator are exactly the same.

For more information, visit:

optical modulator
A multilayered thin-film device used to modulate transmitted light in integrated photonic circuits.
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