A5054801174- Optical Network Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Advanced Optical Network Technologies
- Semiconductor Quantum Structures and Devices
Microsoft Research (United Kingdom)
2019-2021
Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute
2015-2017
Scuola Superiore Sant'Anna
2013
Osaka University
2013
The increasing gap between the growth of datacenter traffic and electrical switch capacity is expected to worsen due slowdown Moore's law, motivating need for a new switching technology post-Moore's law era that can meet increasingly stringent requirements hardware-driven cloud workloads. We propose Sirius, an optically-switched network datacenters providing abstraction single, high-radix connect thousands nodes---racks or servers---in while achieving nanosecond-granularity reconfiguration....
We demonstrate 100 GBd operation of an optical transmitter module including a distributed feedback laser monolithically integrated with Mach-Zehnder modulator (DFB-MZM), to the best our knowledge for first time. Combining high-speed optics and electronics digital signal processing (DSP), different schemes intensity modulation direct detection at 100, 200, 300 Gbit/s are analyzed, using electrical signals from GSa/s BiCMOS DAC. Due close-to-zero chirp, NRZ transmission over 1.8 km 200 PAM4...
Networks inside current data centers comprise a hierarchy of power-hungry electronic packet switches interconnected via optical fibers and transceivers. As the scaling such electrically-switched networks approaches plateau, power-efficient solution is to implement flat network with circuit switching (OCS), without reduced number transceivers due direct links among servers. One promising ways implementing OCS by using tunable lasers arrayed waveguide grating routers. Such an OCS-network can...
We demonstrate a wavelength switching PIC whose time (0.912 ns) is independent of the tuning range, and an optical system (50Gbps PAM4) using fast burst-mode channel equalization, achieving 3.84 ns latency.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text S. Lange, Wolf, J. Lutz, L. Altenhain, R. Schmid, Kaiser, C. Koos, Randel, and M. Schell, "100 GBd Intensity Modulation Direct Detection an InP-based Monolithic DFB Laser Mach-Zehnder Modulator," in Optical Fiber Communication Conference Postdeadline Papers, OSA Technical Digest (online) (Optica Publishing Group, 2017), paper Th5C.5. Export BibTex Endnote (RIS) HTML...
We present a transmitter optical subassembly consisting of an InP-based travelling wave electrode Mach-Zehnder modulator monolithically integrated with distributed feedback laser. At 56-Gb/s non-return-to-zero ON/OFF keying (NRZ-OOK), we achieve 3.5-km transmission before breaking the hard decision forward error correction threshold (3.8 ×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-3</sup> ). 9-km is achieved at 71.6-Gb/s...
We study the nonlinear phase distortions in a columnar quantum dot semiconductor optical amplifier (QD-SOA) for coherent 16 quadrature amplitude modulation (QAM) signals. A few ps gain recovery QD-SOA enables suppression of pattern dependent noise, which is major performance limiting issue conventional SOAs. 25 dB and intensity transparent amplification 40 Gb/s QAM signals experimentally demonstrated by error vector magnitude measurement.
A simple digital pre-compensation technique for the pattern-dependent phase distortion in Semiconductor Optical Amplifiers is proposed coherent QAM transmitters. The performance of compensator experimentally evaluated 40Gbps 16QAM systems.
We present a transmitter consisting of travelling wave electrode InP-based Mach-Zehnder modulator monolithically integrated with DFB laser. For the first time, 60Gb/s NRZ at low 1.5Vpp modulation voltage and zero chirp is demonstrated.
An optical transmitter incorporating a monolithically integrated laser and traveling wave electrode in-phase quadrature modulator is presented. A co-designed SiGe differential driver was co-packaged for highest quality push-pull modulation. With only 0.1-dB coupling loss between the modulator, low switching voltage power consumption 1.1 W, which fits CFP4 (analog coherent optics) ACO module overall budget of 6 W. Without DSP precompensation, FEC or equalization, 32 GBd QPSK with 3 V pp...
We demonstrate sub-nanosecond wavelength switching, using a chip-based soliton microcomb and semiconductor optical amplifier-based selector. 50-Gbps PAM4 transmission is achieved with discrete components 25-Gbps NRZ photonic integrated
We present for the first time 32 GBd QPSK of an InP-based IQ modulator with monolithically integrated laser and co-packaged SiGe driver. Power consumption is 1.1 W, which well within CFP4 module overall budget 6 W.
We experimentally demonstrate 25 dB transparent amplification of 40 Gbps optical coherent 16-QAM signals with 10 dBm output power using a Columnar Quantum Dot Semiconductor Optical Amplifier which avoids the undesired pattern dependent phase distortions.
The development of advanced InP-based transmitter PICs increasing complexity and integrating periodically capacitive-loaded (CL) Travelling Wave Electrode (TWE) Mach-Zehnder modulators is reported discussed in examples.
We present a novel 1300 nm transmitter subassembly with an InP-based DFB-laser Mach-Zehnder modulator (DFB-MZM) PIC and SiGe 2-bit DAC driver demonstrate up to 25 km 56 GBd PAM4 transmission low 332 mW power consumption.
Optical switches represent an appealing option to address the upcoming scaling challenges facing electrical in data-center networks with slowdown of Moore's Law and exponential increase network demands posed by emerging cloud workloads. Wavelength switching based on tunable lasers passive arrayed waveguide grating routers is a particularly promising technology for optical due its amenability fast nature core, which leads lower power consumption higher fault tolerance. We investigated...