blendinG diverse photonics And eLectronics on silicon for integrAted and fully funCTIonal COherent Tb Ethernet

START/END DATE 1 October 2010 / 30 September 2013

4.018.219 EUROS TOTAL


Currently system vendors request a photonic integration technology to deliver practical and cost-effective 100GbE systems. GALACTICO is a project that aims to provide this technology and disrupt the transition from 10/40Gb/s to 100GbE core networks. To achieve this goal, GALACTICO aims to squeeze current bulk and costly 100GbE interfaces into silicon-based PICs and provide integrated coherent transmitters and receivers that deliver a massive amount of aggregate bandwidth. To address cost, performance and volume, GALACTICO aims to provide the right mix of the three most established integration materials, i.e. InP, GaAs, Si and combine their strengths on a common silicon platform. The GALACTICO platform will offer low loss (~0.1dB/cm) silicon waveguides and <1dB fiber-to-chip coupling loss. The board will be used to integrate densely all the polarization and filtering components. GALACTICO will develop the first SOI-compatible GaAs IQ-modulators. The available large GaAs wafers will enable volume production without compromising performance. The modulators will exhibit 30GHz electro-optic bandwidth with ~3V driving voltage. To address scalability, GALACTICO will integrate on-board arrays of 4x GaAs IQ-modulators suitable for DWDM coherent transmitter PICs. GALACTICO will also exploit the high-performance InP material by integrating arrays of 8-element 40GHz flip-chip compatible photodetectors for the DWDM coherent receivers. GALACTICO will integrate on-board all the electronic circuits using SiGe HBT technology. New 4level, 32Gbaud drivers will be integrated with the linear IQ modulators to realize 16QAM and enable line rates beyond 200 Gb/s. GALACTICO will deliver the following fully functional PICs: 1) 100Gb/s DP-QPSK coherent transmitter and receiver, 2) 512 Gb/s DWDM DP-16QAM coherent transmitter and receiver and 3) 256 Gb/s DP-16QAM transmitter achieving 5.12bit/sec/Hz spectral efficiency. Finally, GALACTICO will explore the limitations of high constellation size at high baud rate with the generation of single carrier 320 Gb/s DP-32QAM and DWDM 1.28 Tb/s combining a 6-level driver and the integrated polarization multiplexed GaAs IQ modulators. By so doing GALACTICO will open the way for next generation TbE networks.



Latest News

GALACTICO new invited papers

GALACTICO invited paper in JLT: Publication title: “Monolithic GaAs Electro-Optic IQ Modulator Demonstrated at 150 Gbit/s with 64QAM”. Link to paper

GALACTICO invited paper in ICTON 2013: Publication title: “Cost-effective Broadband GaAs IQ Modulator Array for Long-Reach OFDM-PONs”. Link to conference website

Invited paper in Frontiers in Optics reporting GaAs modulator technology: Publication title: “Non-linear nano-photonics”. Link to conference website

GALACTICO post-deadline paper @ OFC 2013: Publication title: “First Monolithic GaAs IQ Electro-optic Modulator, Demonstrated at 150 Gbit/s with 64-QAM”. Link to paper

GALACTICO contributed paper @ OFC 2013, Anaheim, CA: GALACTICO presentation @ OFC 2013. Publication title: “Fabrication of the First High-speed GaAs IQ Electro-optic Modulator Arrays and Applicability Study for Low-Cost Tb/s Direct-Detection Optical OFDM Networks”. Link to paper

High speed IQ GaAs modulators: GALACTICO demonstrates 44 Gb/s QPSK transmission with GaAs IQ modulator and fabricates high speed quad IQ modulators for new generation multi-carrier OTN systems. Read more

GALACTICO demonstrates high bandwidth Ge diodes for new generation silicon integrated coherent receiver modules: Ge diodes with >23 GHz 3-dB bandwidth and record performance in terms of dark current (<50 nA) and responsivity (>0.8 A/W) have been fabricated using Germanium epi o n 220 nm SOI substrates by GALACTICO partner IHP. Read more

20/06/2012 GALACTICO @ 17th European Conference on Network and Optical Communications

GALACTICO will be presented at NOC 2012 as part of the invited presentation “Advances in Networking” given by Stefan Spälter – Nokia Siemens Networks. NOC 2012 will be held in Vilanova i la Geltru, Spain. Link to program

25/06/2012 GALACTICO goes to the 9th International Conference on Group IV Photonics

GALACTICO accepted oral presentation at GFP 2102: "Hybrid Integration of Coherent Receivers for Terabit Ethernet on SOI Waveguide PLC". GFP 2012 conference will be held on 29-31 August in San Diego California. Link to advance program


25/06/2012 GALACTICO to present at the 38th European Conference on Optical Communications

“Octary QAM as Capacity Extension for Coherent UDWDM PON”
“Flexible Optical QAM Generation with a Low-Complexity Amplified InP SOA/EAM-Based Modulator”

ECOC 2012 will be held on 16-20 September in Amsterdam. Link to conference program

04/03/2012 GALACTICO @ OFC 2012, Los Angeles, California

GALACTICO presentation @ OFC 2012. Publication title: Phase Entropy-Based Frequency Offset Estimation for Coherent Optical QAM Systems. Link to paper

06/05/2012 GALACTICO @ CLEO 2012, San Jose, California

GALACTICO presentation @ CLEO 2012. Publication title: Frequency Offset Estimation in M-QAM Coherent Optical Systems Using Phase Entropy. Link to paper

19-21/9/2011: ECOC 2011 Geneva

GALACTICO showcases at ECOC 2011 exhibition. GALACTICO was exhibited at this year ECOC through the exhibition booths set-up by U2t, Constelex and NoE EURO-FOS. Device prototypes were displayed and project brochures were distributed to the conference visitors.


20/9/2011: ECOC 2011 Geneva

IHP and TUBerlin JointLab publication at ECOC 2011. Publication title: Fully passive Si-photonic 90° hybrid for coherent receiver applications. For more info click here


20/07/2011: GALACTICO presentation at IEEE Photonics Society Summer Topicals 2011 conference.

The GALACTICO concept and the first research results were presented at the recent 2011 Photonics Society Summer Topical Meetings held in Montreal. The presentation entitled: “The European Galactico Project: Coherent Terabit Ethernet Systems Using 4 μm Rib Waveguide Silicon-on-Insulator Technology and GaAs modulators” was part of the Terabit Optical Ethernet Topical Meeting. The talk was given by CONSTELEX Technology Enablers. For more info click here.

26/5/2011: Presentation to members of the Electrical Engineering Students European Association EESTEC

Constelex presentation on "starting a technology company" focused on disseminating the challenges and requirements for creating technology start-ups, presented photonics as enabling technology in ICT and reviewed the company's business and R&D activities. For more information, please click here.