COST 270 Thessaloniki, 20/21. 6. 2002 Reliability of Optical Components and Devices in Communications Systems and Networks COST Action 270 Reliability.

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

COST Action 270

Reliability of Optical Components and Devices in Communications Systems and Networks

Vice chairman: Aleksandar OpacicHuber and Suhner, SWITZERLAND

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Overview

• Structure• Objectives for the action and WG’s• Free Space Communication • Results of each WG• High Optical Power Issues• Future issues

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

COST 270 MC

Working group 1 Working group 2

Study group 1

Study group 2

Study group 3

COST Action 270: today's structure

Network Availability

Components Reliability

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Transmission NetworkAerial

Manhole

Direct Burried

Handhole

Vaultor

Basement

Premise cabling WallStreet cabinets

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Action objectives• methods to ascertain and improve the reliability of

new types of optical components,• transmission network and component costs based on

performance and installation requirements, • trunk, core, access and in-house networks,• failure mechanisms, life tests and lifetime

estimation methods• collaboration: manufacturers and research

institutes/universities• technical background for ETSI, CENELEC, IEC,

and ITU-T

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Working Group 1

Reliability of optical networks and systems including transport and access network and free space communication

Chairman: Lena WosinskaRoyal Inst. of Technology, SWEDEN

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

• Investigation of availability performance of optical networks in order to define the weak points in the network and develop a methodology for designing optical networks that are robust to failures.

WG1 objective

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Results WG1• Availability of the optical networks

– Limitations caused by reliability requirements on network design and size

– Limiting factors for scalability of optical networks– Efficiency of a reparation process (fibre cable)

• Reliability of access networks– Review of technologies for LAN and MAN based on

Ethernet and ATM

• Gathered reliability data for components– Rel. handbook RDF2000, France Telecom (FIT numbers

of components for optical networks)

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Free Space Laser Communication

Alternative and Supplement / Extension to existing Broadband Communication Techniques

Cost effective and fast installation Broadband solution for „Last Mile Access“! Availability evaluation of existing systems Reliability and Availibilty is mainly determined by

local wheather (fog, rain and snow )

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Free Space Laser Communication (cont.)Outside plant! Summer months:

Availibility better than 99.9 %

Fog and rain: total signal loss

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Working Group 2

reliability of passive components including jumper cables

effects of high optical power application

Chairman: Francis BerghmansSCK.CEN, BELGIUM

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Results WG2• Polyimide coated Fibre Bragg gratings (FBG)

–Humidity transducer/ Enhanced sensitivity to temperature

• Connectors in outside plant –UV-light when re-connecting/ Corrosion/Re-

connecting and cleaning • Optical fibres

–Aged fibre surface in various conditions–OLCR characterisation of standard acrylate coated

fibres• Optical power splitters

–Present lifetime predictions are too conservative at low humidity

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Results WG2 (cont.)

• 3 Study groups were established• Reliability of FBG’s

– state of the art of FBG reliability – Round-robin campaign on FBG measurements

• Life testing of polymeric fibre materials– general approach of increasing impact of natural

variables (temperature, solar irradiation, moisture) to induce faster degradation

• A complete study plan for connectors was presented

• Informal liaison with standardisation bodies for passive components was set up

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

High Power Issues Rationale

–DWDM and fibre amplifier technology networks carrying a significant amount of optical power (2 W !)

High Power Effects–Raman-gain and fibers, splices and connectors?–Damage threshold,–Intrinsic or extrinsic damage, –Improvement possibilities against extrinsic damage,–New field of reliability – standardization bodies needs, –Need for new manufacturing procedures and design rules

Table of components and associated high power failure modes and mechanisms was established

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

FP6 EoI Proposal: 6.2002CHOPIN

Title Coping with High Power In optical communication Networks

Participation 5 institutes and 3 private companies

Principle objective• assess the reliability under high optical power• support scientific and laboratory work • contribute to world-wide standardization, network of

excelence

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Study Group 1 optical connectors and patchcords high optical power applications reliability based on reasonable mathematical model and

tailored testing procedures accepted by manufacturers, OEM/system suppliers and

end users

implementation in international standardization bodies. Special rapporteur: Peter KrausseDiamond SA, Switzerland

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Reliability/FIT Connectors Patchcords

Failures- mode- mechanism

Reliability/acceleratedtest models- FIT

Similarity effects- materials- types

Field data

Existing standardsIEC, Telcordia

Performance/FunctionalityRequirements

Acceleratedtests - FIT

Work area SG1

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Study Group 2: FibresSpecial rapporteur: Prof. Frederique de Fornel, Univ. Bourgogne, France

• Study Group 3: Fibre Bragg GratingsSpecial rapporteur: Dr. Hans Limberger, IOA-EPFL, Switzerland

Other study groups

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Future activitiesCOST 270:• meeting in Kista/Sweden 28/30 June 2002 (4 new participants and 1

STM)• workshop (with SPIE) Oct./Nov. 2002 in Brugge/Belgium

WG1:• models for survivability, cost studies, network optimisation • weak points in the network, components reliability data• requirements for components, study of FTTH networks

WG2:• Determination/interface within new structure• Create network for high optical power impact • Test activities, close liaison to standardization bodies

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Summary• 13 signatories• combination of manufacturer and institutes• science based on extensive theoretical and laboratory

work• some results up to now• high optical power issues through the whole action • splitting into smaller SG’s for better • FoI FP6 as supporting activity• liaison to standardization bodies

Thessaloniki, 20/21. 6. 2002

Reliability of Optical Components and Devices in Communications Systems and Networks

COST 270

Thank you for your attention!