COST 268 Wavelength Scale Photonic Components for Telecommunications Comments on the action and on C

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COST 268 Wavelength Scale Photonic Components
for Telecommunications Comments on the
actionand on COST as researchAnders Karlsson,
Chairman Royal Institute of Technology, Sweden
http//www.ele.kth.se/COST268/
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Outline

• An introduction to COST today
• COST future
• COST 268 organization and results

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COST history
34 member countries 170 ongoing actions
(project) 20000-25000 scientists involved
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Why COST what domains?

• An action is an open project around a theme
• Complementary to framework projects
• Bottom-up approach- the scientists propose the
  topics
• A wider geographical coverage than EU programs
• Supports young researchers and newly established
  groups

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Looking forward in Photonics

Wavelength Scale Photonics - reduced power
consumption - low cost - increased device speed -
higher level of integration

• VCSELs dominating for datacom
• LW VCSELs for access network
• High refractive index contrast PBGs may give
  novel integrated optics
• Novel gain materials fornew wavelengths

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COST 268 in brief

• Our aim to investigate and promote the use of
  wavelength scale photonics in telecommunications
• Our work- work on joint technical topics,
  discussed in WG sessions (later today)- sponsor
  short term missions, people working lt1month in
  other labs- arrange or co-assist with workshops
  (such as this one)- assist with coordination and
  dissemination of research

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COST 268 Organisation
Chair, vice-chair administration
ManagementCommittee
WG3Novel gain materials Chair Alfred Forchel,
Univ. Wurtzburg, Andrea Fiore, RomaEli
Kapon, EPFL, Switzerland
WG1 Vertical cavities Chair Jan Danckaert,
VuB Roel Baets, Peter Bienstmann, Univ. Gent
Karl-Heinz Gulden CSEM, Zurich,
WG2Photonic Crystals ChairsRichard M De La
RueGlasgow Univ.,Rene DeRiddersTwente George
Kiriakidis, FORTH, Greece
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Participation in COST 268

• Large community
• 19 member countries
• 3 associated members
• - more than 40 groups
• - Universities and industries

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COST 268 results

• Modulation properties of RED 670 nm
• VCSELs for plastic optical fiber (POF)
• - 3-dB bandwidth 4.5GHz
• - Modulation efficiency 2.8GHz/(mA)½
• - 1 Gbit/s error-free transmission
  through 50m GI-POF
• KTHMITEL invited paper Photonics West 2000

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VCSEL modeling...
Investigate position dependent effect of thin
oxide window
Resonance wavelength (d8 um)
981,5
981,0
980,5
980,0
979,5
979,0
978,5
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3
4
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position

• 9 group did modeling comparison
• 7 groups compared oxidation rate from joint
  wafers

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WG 2 Modeling Exercise
Goal understand role of losses in deeply etched
gratings Importance compact integrated
optics for DWDM COST 268 Comparative modeling
by Prague, Hagen, Twente, Gent, and Glasgow

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STMs an important vehicle
High speed properites of tunnel-junction
VCSELs Photonic Crystal cavities Agreement
between numerical modelling and experimental
results on the coupling constants in multicore
Photonic crystal fibers "Ultrafast carrier
dynamics in 1.3 mm quantum dot amplifiers  Optic
al pumping experiments on VCSEL cavities with
GIRO gratings Modeling of multimode behavior
of VCSELs. "Modelling of vertical cavity
resonances in photonic crystal films"   "Recent
insights in the polarisation behaviour of
VCSELs experiments and theory",    Analog
distortion measurements of VCSELs "Experimental-t
heoretical comparison of polarization
instabilities in VCSELs" "High Speed Modulation
Characteristics of 1.55 µm InP-based VCSELs with
buried tunnel junction" "Linewidth measurements
of 1.5 µm VCSELs" "Inclusion of distortion and
noise in rate equations for VCSELs"
"Experimental study of the dynamics of
polarisation switching in VCSELs" "Modelling of
electronic states in InAs/GaAs quantum dots
emitting around 1.3 ?m"
15 STMs Similar programin-existentin
otherprojects
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COST 268 meetings

• WG/MC meeting, 981019, Brussels 20
  participants
• WORKSHOP WG/MC MEETING, 990315-17, Stockholm, 70
  participants workshop Wavelength scale
  photonics.
• WG/MC, 991018-19 at FORTH, Crete, Greece 40
  participants
• WG/MC, 000316-17, University College, Cork,
  Ireland 50 participants
• WORKSHOP and WG/MC,000828-30, Brussel 90
  participantsworkshop European workshop on
  VCSELs from physics to applications.
• WORKSHOP and WG/MC Würzburg,  010225-28
  50 participants workshop International
  workshop on novel gain materials
• WORKSHOP and MC/WG meetings, Lecce, 010916-19,
  2001. 50 participants
• COST 268 MC/WG meetings, Warsaw, 020425-26, 2002.
  ? coorganised with ICTON ESPC

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COST problems

• COST ist too cumbersome to operate
• COST is superflous or should be handled by others
• Insufficient avaible funds for actions
• Commission not clear about their role
• An assessment of COST 2002, CSO report
  2002N. E. BuschD. CoatesR. LososchL. S.
  Menendes

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High official of member countryperhaps the
argument for the continuation of COST is that the
scientific community wants it and that it works

• Panel recommendations
• Allow actions to manage their own affairs
• Provide measures to improve communication use
  of results
• Benchmark best-practice in quality and in
  selection of experts
• Enhance role of technical committies links
  with commission

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Summary

• COST 268 running well, but this is final meeting
• Technical work well in focus to current worldwide
  research interest
• please discuss follow-up action(s)
• - Physics of linear and non-linear interactions
  in photonic bandgap structures- Possible
  combination of COST 268 COST 267 concerning
  high speed photonics- Other proposal

Please visit http//www.ele.kth.se/COST268/