Integrated photonic transceivers at sub-terahertz wave range for ultra-wideband wireless communications


FP7 ICT-5-3.9 Microsystems and Smart Miniaturised Systems


This project is supported by the European Commission under the Information and Communication Technologies (ICT) Theme of the 7th Framework Programme, within the Smart micro/nano systems area of ICT Challenge 3: Components, Systems, engineering.

Public summary of the Second Year Achievements

Date: 
20/09/2012
Visibility: 
Public

WP1 (Management)

Within this period we have developed high performance integrable photodiodes that have bandwidths exceeding 120 GHz, the system target for iPHOS. We have also improved the 75 GHz photodiodes to deliver > -2 dBm output power, a level exceeding that envisaged in the project link budget. 

On the development of dual wavelength sources, it is worth to mention that we have made the first demonstration of signal generation using two AWG channels from the TUE integrated source.

Also, we have developed a fabrication process that allows processing photodiodes on an active/passive wafer in which lasers can be grown monolithically with passive components.

WP2Dual Wavelength Signal Source)

Fabrication of DFB and AWG-iDWSS

 

BL1_on_submount

 

 

 

photo_idwss_câblé.jpg

iPHOS Dual Wavelength AWG-based source

iPHOS Dual Wavelength DFB-based source

The fabrication of dual wavelength sources ended during this period, producing AWG- and DFB-based devices. Some important achieved characteristics are:

AWG-iDWSS

§  AWG channel spacing fixes wavelength separation

§  Side mode suppression ratio > 25 dB

§  Beat note linewidth < 1 MHz

DFB-iDWSS

§  2 DFB laser sections

§  Tunability: Phase shift sections

§  Data modulation: SOA/EAM sections

§  Amplification: SOA sections

Delivery of Samples to Packaging

Aluminum Nitride submounts with and without AWG-based devices have been sent for packaging, to develop a housing.

WP3 (High Speed Photodiode)

Improved Performance of 70 GHz Photodiodes

UDE batch of 70 GHz photodiodes

Measured output RF power performance

 

The fabrication of 70 GHz photodiodes during this period has continued to improve the characteristics of the iPHOS photodiode. Some important achieved characteristics are:

§  DC responsivity:  up to 0.5 A/W without AR coating

§  Response flatness deviation ±0.5 dB within 71-76 GHz

§  Output RF power of –1.8 dBm at 12 mA (50 Ω load)

§  Return loss of >24 dB within 71-76 GHz

 

120 GHz Photodiodes

 

 

ATL 120 GHz photodiodes

Measured frequency response


In order to gain understanding of the risks of integrating a photodiode and a laser, we have already processed photodiodes on the same wafer in which the sources were being processed. The most relevant characteristics are:
 

§  Monolithic Photodiode process validated

§  DC Responsivity: up to 0.34 A/W.

§ Frequency Response (-3 dB BW) up to 170 GHz

§  Output RF power up to 1 dBm

WP4 (Sub-System Integration And Packaging)

70 GHz PD modules development

 

Description: G:\Unbenannt4.png 

Description: F:\TUB_iPHOS_Project_Meeting\Fotos vom 20.04.12\2012-04-20 17.39.39.jpg 

iPHOS photodiode submount

Test of the WR12 transition at UDE

Packaging of UDE 70 GHz photodiodes is taking advantage of commercial E-band amplifiers to provide electronic gain prior to launching the electrical power into the waveguide feeding the antenna. The main results are:

§  Photodiode modules with electronic amplification (up to 37 dB) in the E-band (71–76 GHz)

§   Transition to WR12 output tested .

§  HPA integrated with transition to WR12 output tested

§  Amplification exceeding 20 dB achieved

70 GHz compact Schottky receiver

A compact Schottky Barrier Diode (SBD) has been developed, creating a compact receiver based on planar antennas.

Description: IMG_2403

Front view of the iPHOS Schottky receiver, showing the silicon lens and SMA output of the data signal

Description: IMG_2407

Back view of the iPHOS Schottky receiver, showing a log periodic antenna on the HR-Si substrate

WP5 (Sub-TeraHertz Data Transmission System Test)

Data Transmission at 70 GHz using iPHOS PD and compact Schottky receiver

 

Sub-Terahertz Wireless Transmission System at UDE employing iPHOS 70 GHz High-Power Double-Mushroom PD from UDE and iPHOS 70 GHz SBD from ACST and Madrid 

WP6 (Dissemination

Technical dissemination 

Peer-reviewed joint publications and conference

Several joint publications have resulted within the second year of the iPHOS project, all gathered at the project publications page of the project website http://www.iphos-project.eu/publications


Dissemination on broad scope technical magazines

The consortium has publish a brief summary of the results on WP3 concerning high speed photodiodes, which was of interest to the publication EE Times Europe.

EE Times Europe Technology News, April 20, 2012

 

Dissemination on Social Networks

During this period, a dissemination action has been to create iPHOS information on social networks such as Linkedin ( to disseminate the project to the contacts of the project participants) and Facebook (To exchange updates via friendship links with other bodies having Facebook –Universities, Research institutions-) 

 

Non-Technical dissemination

Publication of broad scope audience information

A non technical publication that claims to carry analysis of issues that crucially affect the public sector throughout Europe, including health, education, transport, science and the environment published a summary of the project objectives.

Public Service Review, May 14, 2012

 

Madri+d Award

The iPHOS project was awarded the best cooperation prize by the madri+d foundation, resulting in the following dissemination results:

·       Madridiario.com video with interview to Project Coordinator. Available at :http://www.madridiario.es/2012/Junio/ciencia-tecnologia/noticias/218469/madrid-premios-iniciativas-ciencia-tecnologia.html01

·       University Carlos III de Madrid News :http://www.uc3m.es/portal/page/portal/repositorio_noticias/noticias_generales/Premios%20madri+d%20para%20investigadores%20de%20la%20UC3M?_template=/SHARED/pl_noticias_detalle_pub

·       Madrid+d interview : http://www.madrimasd.org/cienciaysociedad/entrevistas/revista-madrimasd/detalleEmpresa.asp?id=421

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