The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Optical networks hold great promise for improving the performance of supercomputers, yet they have always proven just out of reach. This talk will examine the potential of optical interconnects, barriers to adoption, and possible solutions from hardware/software co-design.
Exploration of energy-bandwidth tradeoffs is performed for a silicon photonic link, showing a maximum capacity of 1.9 Tb/s with an energy cost of 1.54 pJ/bit at 13 Gb/s signaling rate. We conclude that 10 Gb/s yields a good trade-off between throughput and energy efficiency.
Growing demand for bandwidth in Datacom optical links and High Performance Computers (HPC) has recently led to new optoelectronic modules based on Silicon Photonics Integrated Circuits [1]. One of the intrinsic capabilities of this technology is its scalability in terms of aggregated data rate, due to the possibility of combining Space Division Multiplexing, Wavelength Division Multiplexing, and the...
PAM-4 transmission is established by modulating two silicon ring modulators in series with two uncorrelated NRZ encoded data sources. The two modulators are thermally tuned to obtain different extinction ratios. 30Gb/s PAM-4 transmissions are achieved with only 1Vpp.
A silicon photonic microring resonator modulator transmitter utilizes a segmented pulsed-cascode output stage for voltage level control to achieve PAM4 modulation on a single microring device. The 65nm CMOS transmitter achieves 40Gb/s operation at 3.04mW/Gb/s when driving depletion-mode microring modulators with 4.4Vppd swing.
Package-level integration of disparate technologies on either silicon interposers or organic packaging substrates is a key enabler for future optical subsystems. High-performance computing and networking applications will require tremendous interconnection bandwidth between co-packaged dies. To make package-level integration seamless, transceivers for these ultra-short-reach links must fit within...
The Datacom industry has adopted 50–56Gb/s (50G) as one of the next data rates for short reach communications. This talk will cover the status of directly modulated VCSELs for 50G in the wavelength range of 850–1100 nm for multimode fiber and at 1550 nm for single mode fiber.
We demonstrate a double-mesa short-cavity 1.5-μm single-mode directly-modulated VCSELs with modulation bandwidth above 20 GHz at room temperature operation.
Systematic variations of the photon lifetime in concert with variations of the oxide-aperture diameter lead to a record increase of the bit rate up to 55 Gbit/s at room temperature for our energy-efficient 980 nm vertical-cavity surface-emitting lasers.
This paper presents low power, 2×25.625Gb/s optical transmitter and receiver ICs for Intel Thunderbolt optical cable technology which is designed to connect electronic devices with the intension to become the standardized optical interconnect. Same circuit with four channels (4×25.625Gb/s) can be used in 100G data center optical interconnect. Each transmitter channel consumes 68mW, receiver channel...
A 3-mode multiplexing and de-multiplexing silicon photonic circuit is shown to support 240 Gb/s data (3 modes × 2 wavelengths × 40 Gb/s). The key drivers for optimizing the photonic circuit performance are discussed.
The National Network for Manufacturing Innovation (NNMI) is a network of research institutes in the United States that focuses on developing and commercializing manufacturing technologies through public-private partnerships between U.S. industry, universities, and federal government agencies. As one of the early institutes, the American Institute for Manufacturing integrated Photonics (AIM Photonics)...
The influence of spurious resonances due to the resonant nature of ring optical network-on-chip architectures is investigated numerically for the first time. These unwanted resonances result in a reduction of the usable bandwidth of add-drop multiplexers, hence tighter laser stability requirements than in point-to-point links.
Operating power of silicon photonic thermo-optic tuners and switches using undercut is inversely proportional to response time. Aggressively undercut devices have 23x power reduction and excellent ruggedness, with reversible behavior up to 60x operating power, and rapid failure when the core temperature reaches a remarkably high 1500°C. Hence device length can be greatly reduced.
We propose the use of a dual-microring system as an on-chip multi-level signal generator without using an external digital-to-analog converter (DAC). Four-level pulse-amplitude modulation (PAM-4) signals up to 60 Gb/s have been experimentally achieved.
We propose a scalable multi-board HPC blade architecture with optical interconnection based on wavelength routing in Arrayed Waveguide Grating Routers (AWGRs). Benchmarking simulations show reductions up to 2× in energy consumption and 3× in execution time.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.