Following a decade of radical advances in the areas integrated photonics and computing architectures, we discuss use optics current landscape attempting to redefine refine their role based on progress both research fields. We present set critical challenges faced by industry provide thorough review photonic Network-on-Chip (pNoC) architectures experimental demonstrations, concluding main obstacles that still impede materialization these concepts. propose employment chip-to-chip (C2C) rather...

Real-time control of multiple cascaded devices is a key requirement for the development complex silicon photonic circuits performing new sophisticated optical functionalities. This article describes how dithering technique can be leveraged in combination with non-invasive light probes to independently working point many components. The standard extended by introducing concept orthogonal signals simultaneously discriminate effect different actuators, while idea frequency re-use discussed...

We report an 8 × silicon photonic integrated Arrayed Waveguide Grating Router (AWGR) targeted for WDM routing applications in O-band.The AWGR was designed cyclic-frequency operation with a channel spacing of 10 nm.The fabricated exhibits compact footprint 700 270 μm 2 .Static device characterization revealed 3.545 dB maximum loss non-uniformity 2.5 best-case insertion losses and 11 crosstalk, good agreement the simulated results.Successful data is demonstrated 25 Gb/s signals all port...

We experimentally demonstrate an all-optical static random access memory (RAM) cell using a novel monolithic InP set-reset flip-flop (FF) chip and single hybridly integrated semiconductor optical amplifier-Mach-Zehnder interferometer (SOA-MZI)-based gate employing wavelength division multiplexing (WDM) data encoding. The FF device is 6×2 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> having 97.8% reduced footprint compared with...

We demonstrate a 200G capable WDM O-band optical transceiver comprising 4-element array of Silicon Photonics ring modulators (RM) and Ge photodiodes (PD) co-packaged with SiGe BiCMOS integrated driver transimpedance amplifier (TIA) chip. A 4×50 Gb/s data modulation experiment revealed an average extinction ratio (ER) 3.17 dB, the transmitter exhibiting total energy efficiency 2 pJ/bit. Data reception has been experimentally validated at 50 per lane, achieving interpolated 10E-12 bit error...

Today, the datacenter ecosystems are fueling demand for novel transmitter (TX) technologies complying with off-board, on-board, and chip-to-chip computing needs. This has set a new class of requirements TX infrastructure that should now offer multiple credentials, namely: high-speed, O-band operation avoiding dispersion compensation in long distances, wavelength-division multiplexing (WDM) capabilities higher throughput multicasting/broadcasting support, tight co-packaging low-power...

A silicon photonic circuit comprising all the building blocks necessary to demonstrate optical communication between two sockets interconnected through an Arrayed Waveguide Grating Router (AWGR) is reported. The article focuses on robustness of interconnection scheme unavoidable wavelength and thermal fluctuations observed in real datacenter environments. To improve reliability system, a feedback control mechanism, based contactless integrated probes (CLIPP) heater actuators, added monitor...

We present an O-band any-to-any chip-to-chip (C2C) interconnection at 40 Gb/s suitable for up to 8-socket direct connectivity in multi-socket server boards, utilizing integrated low-energy photonics the transceiver and routing functions. The C2C interconnect exploits Si-based ring modulator as its transmitter a co-packaged photodiode/transimpedance amplifier enabled receiver interconnected over 8 × arrayed waveguide grating router, allowing single-hop flat-topology between eight nodes. A...

We propose and experimentally demonstrate the first all-optical content addressable memory (CAM) cell that comprises an monolithically integrated InP flip-flop optical XOR gate. The experimental results reveal error-free operation at 10 Gb/s for both addressing writing operations. potential of these architectures to allow up 40-Gb/s could presumably lead fast CAM-based routing applications by enabling address look-up schemes.

Arrayed Waveguide Grating Router (AWGR)-based interconnections for Multi-Socket Server Boards (MSBs) have been identified as a promising solution to replace the electrical interconnects in glueless MSBs towards boosting processing performance. In this article, we present an 8-socket optical flat-topology Wavelength Division Multiplexing (WDM)-based point-to-point (P2P) interconnect pursued within H2020 ICT project ICT-STREAMS and report on our latest achievements deployment of constituent...

Electronic Content Addressable Memories (CAM) implement Address Look-Up (AL) table functionalities of network routers; however, they typically operate in the MHz regime, turning AL into a critical bottleneck. In this communication, we demonstrate first steps towards developing optical CAM alternatives to enable re-engineering memories. Firstly, report on photonic integration Semiconductor Optical Amplifier-Mach Zehnder Interferometer (SOA-MZI)-based Flip-Flop and Random Access monolithic InP...

We present an O-band energy-efficient broadcast-friendly optical architecture relying on a silicon photonics broadband MZM and 8×8 AWGR. Experimental validation is demonstrated at 10Gb/s followed by energy-saving analysis for the proposed broadcast scheme.

We present an O-band silicon microring modulator with up to 50 Gb/s modulation rates, co-packaged a 1V-CMOS driver in dispersion un-compensated, transmission experiment through 52 km of standard single-mode fiber. The experimental results show 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-9</sup> error-rate operation negligible power penalty 0.2 dB for 40 and wide-open eye diagrams data, corresponding record high bandwidth-distance product...

In this article, we present for the first time to our knowledge, a DWDM 16 × silicon photonic cyclic-frequency AWGR device. The features channel spacing of 1.06 nm (189 GHz), free spectral range 17.80 (3.16 THz) and 3-dB bandwidth 0.65 (116 GHz). Its proper operation was experimentally verified all channels with peak insertion loss values in 3.90 dB 8.37 dB, yielding non-uniformity 4.47 dB. compact footprint 0.27 mm 0.71 its low crosstalk value 21.65 highlight potential employment future...

In this paper, we demonstrate for the first time a monolithically integrated InP All-Optical Flip-Flop (FF) based on optical coupled SOA-MZI switches. The experimental proof of principle demonstrated successful error free operation SR-FF functionality at 5 Gb/s.

An all optical multi-wavelength tag comparator unit followed by a semiconductor amplifier-read access gate (SOA-RAG) is presented for all-optical cache memory architectures. Proof-of-principle operation of the Tag Comparison (TC) circuit as dual-bit tag-comparison stage exploiting cross-phase modulation-based XOR logic gates based on SOA-Mach-Zehnder interferometers (SOA-MZIs), in order to decide upon hit or miss operation, while two SOA-MZI outputs control ON/OFF cross-gain-modulation...

As data centers constantly expand, electronic switches are facing the challenge of enhanced scalability and request for increased pin-count bandwidth. Photonic technology wavelength division multiplexing have always been a strong alternative efficient routing their potential was already proven in telecoms. CWDM transceivers emerged board-to-board level interconnection, revealing wavelength-routing to be applied datacom an AWGR-based approach has recently proposed towards building optical...

We present an O-band micro-ring-based silicon-photonic 4-channel WDM transmitter with 6.75 nm-channel spacing for high-speed optical interconnects and demonstrate 4×40 Gb/s data generation operation featuring energy efficiency of 24.84 fJ/bit/RM under 1.82 Vpp drive.

We present a 400 (8×50) Gb/s-capable RM-based Si-photonic WDM O-band TxRx with 1.17nm channel spacing for high-speed optical interconnects and demonstrate successful 50Gb/s-NRZ operation achieving ~4.5dB Tx extinction ratio under 2.15Vpp drive.

We present an O-band Chip-to-Chip Interconnect for 8-socket direct connectivity exploiting a Si-based Ring Modulator and packaged PD-TIA connected over 8×8 AWGR routing module. Eight scenarios are experimentally demonstrated at 25Gb/s revealing error-free operation.

We propose a crosstalk (XT)-aware wavelength (λ)-detuning scheme to overcome the non-optimal in-band XT limiting all-to-all optical interconnects based on sub-optimal arrayed waveguide grating routers (AWGR). Experimental validation is demonstrated employing an 8 × O-band cyclic Si-AWGR with 10 nm channel spacing and 5.5 bandwidth, where limits simultaneous use of same λ in only 2 out possible AWGR I/O routing scenarios, yielding <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

The rapid increase of bandwidth requirements across the entire hierarchy Data Center (DC) networks, ranging from chip-to-chip, board-to-board up to rack-to-rack communications, puts strenuous in underlying network infrastructure that has offer high-bandwidth and low-latency interconnection under a low-energy low-cost envelope. Arrayed Waveguide Grating Router (AWGR)-based optical interconnections have emerged as powerful architectural framework can overcome currently deployed electrical...

Multi-socket server boards (MSBs) exploit the interconnection of multiple processor chips towards forming powerful cache coherent systems, with interconnect technology comprising a key element in boosting processing performance. Here, we present an overview current electrical interconnects for MSBs, outlining main challenges currently faced. We propose use silicon photonics (SiPho) advancing throughput, socket connectivity and energy efficiency MSB layouts, enabling flat-topology wavelength...

Simplified forwarding schemes relying on Bloom filter (BF)-based labels emerge as a promising approach for coping with the substantial increase in lookup table memory requirements associated growing number of end-hosts DataCenters. In this paper, we present first time successful implementation BF-label scheme over silicon photonic switch fabric and demonstrate its functionality 10 Gb/s data packets that carry BF-encoded labels. The optically enabled setup utilizes Si-based 4 × electro-optic...

We experimentally demonstrate the first all-optical Content Addressable Memory (CAM) cell, employing a monolithically integrated InP Flip-Flop and SOA-MZI XOR gate. Error-free operation during Write Addressing is achieved at 10 Gb/s.