Title :
Feasibility study of an optical bus utilizing InGaAsP vertical transmission optical amplifiers
Author :
Suzuki, Nobuhiro ; Ohashi, Makoto ; Nunoue, Shin-ya ; Nakamura, Masaru
Author_Institution :
RWCP Optoelectron. Lab., Toshiba Corp., Kawasaki, Japan
Abstract :
An optical bus utilizing vertical transmission optical amplifiers with a 3-dB gain could be effective in minimizing interboard connection delay time in massively parallel computers. In this study, the performance of such an optical bus was theoretically investigated from the viewpoints of noise and gain saturation. It is possible to achieve low-power operation in a Fabry-Perot type amplifier with a facet reflectivity of 0.8. By introducing asymmetry into facet reflectivities, the reflection gain, which disturbs stable operation, can be effectively suppressed without a serious increase in operation current. Our study predicted that it will be possible to connect more than 100 boards without electrical repeaters.
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; indium compounds; laser stability; optical computing; optical interconnections; reflectivity; semiconductor lasers; system buses; 3 dB; Fabry-Perot type amplifier; InGaAsP; InGaAsP vertical transmission optical amplifiers; dB gain; facet reflectivity; facet reflectivity asymmetry; gain saturation; interboard connection delay time; laser diodes; low-power operation; massively parallel computers; operation current; optical bus; optical computing; optical interconnections; reflection gain; stable operation; Concurrent computing; Delay effects; Optical amplifiers; Optical computing; Optical noise; Optical saturation; Performance gain; Reflectivity; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
