Working Group 2 (WG2) of COST270
Up-dated: 12 August 2004
WG2: Reliability of passive components, including jumper
cables, fibre coating materials and effects of high optical
power and irradiation
Chairperson: Dr. Francis Berghmans, SCK-CEN, Belgium, Email:
fberghma@sck.cen.be
Objectives of WG2
- Studying the long-term behaviour and failure mechanisms
of new optical components and devices under variable service
conditions.
- Studying the impact of various designs, materials,
structure
and packaging on their reliability.
- Studying the environmental
conditions of service for new components, and specific
requirements for different applications,
such as aerial, underwater, subscriber networks and in-house
applications
- Developing lifetime calculation methods (including
experimental parameters and methods) for optical components,
devices,
systems and networks.
- Studying and developing life testing
procedures and organising joint and "round-robin" tests
on the lifetime testing methods and on the components.
- Collecting
field test data and experience
- Determine FIT values of
components
- Three types of optical components were recognised
to be the most relevant for deeper reliability studies
at the
moment. Three study groups (SG) were established:
- SG1:Connectors and Patch-cords: New types
of optical connectors, e.g. multi fibre connectors,
high power connectors, patchcords and reliability
issues under high optical power applications. The
goal is to get reliability information based on reasonable
mathematical model, to determine especially tailored
testing procedures, which could find acceptance by
manufacturers, OEM/system suppliers and end users
and may also find implementation in international
standardization bodies. This will increase manufacturer
know-how related to reliability and help sharing
expenses for reliability tests.
- SG2:Optical Fibers: Stability and reliability
of standard fibres under high power applications
in amplified high capacity DWDM/CWDM networks, lifetime
models for standard and new types of optical
fibres and cables, plastics fibres, fluoride fibres, laser
fibres, amplifier fibres, subscriber and in
house
cables etc., fusion and mechanical splices, splicing techniques
and splice protection methods:
The work plan for this SG2 is under discussion.
- SG3. Fiber Bragg gratings: Intracore optical
fibre Bragg-gratings, DFB fibre lasers, tuneable
filters, single mode and multiple band pass filters, OADM's,
wavelength routers etc. The goal is to
investigate reliability issues connected with
fiber Bragg grating
devices (irradiated fiber, fiber grating, recoating,
..). Special emphasis will be put on investigation
of high optical power on grating characteristics
(reflectivity, dispersion, sidelobe suppression,
etc.) The results
are important for a considerable number of grating
based on all-fiber devices.
Results of WG2
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