Toward a Scalable Optical Network Achieving a Link Capacity Greater Than 1 Petabit per Second
The Innovative Photonic Network Center (IPC) aims to establish the following four base technologies toward a scalable petabit-class optical network that can accommodate future increases in traffic driven by the expansion of cloud services and spread of smartphones.
We are breaking ground in the new field of high-speed optical signal channel transmission technology that has been difficult to develop only with CMOS technology. Our aim is to achieve highly-dense integration of high-speed devices such as 100-GHz-class bandwidth doublers, modulator driver circuits and an optical modulator to simplify the development of high-frequency packages, and to maximize the performance of the optical front-end module using digital signal processing. By converging digital signal processing technology and optical front-end circuit technology, we aim to achieve long-haul transmission of high-speed optical signals with a channel speed of over 1-Tbps per wavelength.
We aim to reduce noise and waveform distortion in optical transmission systems and dramatically improve the performance and power consumption of the systems. To this end, we will combine ultra-wide-band photonic pre-signal-processing technology such as coherent optical amplification and wavelength conversion technology based on the optical parametric amplification with erbium-doped fiber amplifier (EDFA) technology and digital signal processing.
As an area of particular importance, we are studying space-division-multiplexing transmission technology for overcoming existing transmission capacity limitations in single-mode optical fiber (saturation of spectrum efficiency due to the nonlinear Shannon limit and limits to optical input power caused by the fiber fuse phenomenon) and to achieve long-distance transmission of 1,000 km or greater with link capacity beyond one petabit per second (Pbps).