Development of a Compact Silicon Photonics Light Source for Optical Transceivers
Fujitsu Laboratories has released a compact silicon photonic light source to be used in optical transceivers for high-bandwidth CPU interconnects. The new technology would make it possible to low-power optical transceivers directly in CPU packaging. The new technology paves the way for next generation super-high-speed computers, to be used in optical interconnects between CPUs for exaflops-class supercomputers and high-end servers. The new technology will eliminate any needs for a thermal control mechanism. The light source in the newly developed light source is composed of a silicon mirror and a semiconductor optical amplifier, where the silicon mirror by itself is made of ring resonator and Bragg reflector controlling the lasing wavelength.
The shifts in the light source’s lasing wavelength and the optical modulator’s operating wavelength caused by CPU heat are matched since the sizes of the ring resonators introduced into both the light source and the optical modulator are exactly the same, resulting in elimination of thermal control mechanism, which is required in the existing technology, allowing the optical transceiver to be made more compact and energy efficient.