Fibre optic consultation working group

Project Description

The Fibre Optic specialist group consists of Jan C Petersen from DFM in Denmark, Pierre Blanchard, Laboratoire Central des Industries Electriques, BNM-LCIE Fibronique in France, Martin Wicks from NPL in UK, Jaques Morel from METAS in Switserland, and myself Anne Andersson SP in Sweden.7.2.0 Wavelength fibre optic source and 7.2.1 Optical spectrum analyser 7.1.0 Fibre optic power responsivity have been revised up to last PHORA meeting 2003. Categories to add in CMC revision and not yet agreed on are; 7.5.0 attenuation and 7.7.0 Chromatic dispersion in SM fibres.Submission in CMC for fibre optics this year has been from Slovakia in 7.2.0 and 7.2.1. Acceptance will be after the Phora meeting in Turin April 2004.Regarding the question of evidence i.e. comparison for fibre optic wavelength scales nothing has been done.The suggestion from the group to to do a comparision with an unknown gas with absorption peaks for characterisation, i.e. start a new Euromet with this aim has not been started.Jaques Morel from METAS in Switserland co-ordinated a round robin on chromatic dispersion measurements of single mode fibres, see report of Euromet project no 666. An investigation of fibre optic power scale realisation from 1 mW up to 200 mW at 1550 nm wavelength has been suggested and completed in 2003. The project was financed as a Nordtest project. The participating NMIs DFM, HUT and SP were all realiseing their own scale for fibre optic power with the upper level 200 mW.Traceability to national standards was solved in the project.A comparison of fibre optic power at 1 mW with “low” power detectors was completed.A comparison of powers up to 200 mW with “high” power detectors was completed.Results showed agreement within the uncertainty for the individual laboratories.The high fibre optic power project is also submitted as an EUROMET project 776. A working group will be formed for consultation on facilities in fibre optics.

The group will be to analyse CMC(calibration and measurement capabilities) data submitted by the NMIs within the subfield of fibre optics. Subgroups will be formed to handle the various measurement techniques in fibre optics.

Each participating country should suggest at least one expert in fibre opticts that can be consulted by the working group.

Final Report 2010-06-24

The Fibre Optic specialist group consists of Jan C Petersen from DFM in Denmark, Martin Wicks from NPL in UK, Jaques Morel from METAS in Switserland, Pedro Corredera IFA-CSIC Spain and Anne-Fransoise Obaton from LNE in France coordinated by Anne Andersson at SP in Sweden.

A discussion on an international level was initiated and several mails were exchanged during the spring/summer 2009.

Institution/Name

• CENAM – México, Juan Carlos Bermudez
• NIST – USA, Kent Rochford
• NMIJ – Japan, Kuniaki AMEMIYAk
• LNE – France, Jimmy Dubard, Anne-Françoise Obaton
• CSIC-IFA, España, Pedro Corredera
• DFM – Denmark, Jan Petersen
• METAS – Switzerland, Jacques Morel
• NPL – United Kindom, Martin Wick
• SP – Sweden, Anne Andersson
• KRISS – Korea, Seungkwan
• PTB – Germany, Stefan Kueck
• A* STAR – Singapore, Huang Xuebohuang
• NMISA – South Africa, Mariesa Nelm
   

Many  suggestions of changes and new entries were filed.
Meeting at Bushy house September 16 2009 time:18-20 EURAMET PHORA-fibre optic expert discussion group:

Attending

• Jaques Morel, METAS, Schwitzerland
• Pedro Corredera, CSIC-IFA, Spain
• David Ives, NPL, UK
• Jan C Petersen, DFM Denmark
• Anne-Francoise Obaton, LNE, France
• Anne Andersson, SP Sweden
• Tuomas Hieta, TKK-MIKES, Finland
• Kuniaki Amemiya, NMIJ, Japan
   

Summary of the suggestions at the meeting:

Meeting agreed on suggesting the new entry for loss scale of OTDRs sent out by Jacques Morel, METAS.

Entry – Proposed Changes

• 7.5.0 dB, dB/km dB - Eliminate dB/km
• 7.5.2 the meeting suggests to delete the entry dB/km

During the meeting, it was agreed to suggest to activate the fiber optic power meter linearity entry, but under the fiber optics category, as 7.1.1.

For polarisation mode dispersion, the meeting suggest a corrections to the spreadsheet:

• 7.15      Polarization Mode Dispersion
• 7.15.0  Differential group delay DGD
• 7.15.1  polarization mode dispersion PMD

Our group intension is to discuss the CMC entries for the BIPM database in the field of fibre optics.
The CCPR WG on CMC have the last vote.
The RMOs/ Labs etc that are active in the on-going discussion will be the ones that are influencing the outcome in the entries.
Our discussion included power linearity, attenuation, Length, PMD

General comments from the meeting:

CMC discussion has been going on for 10 years. First years almost all the time at CCPR meetings was spend to create the framework for CMC. The outcome of these efforts was CMC tables. Since it was a difficult task to reach agreement we suggested to add just a few entries every year. We were all agreeing on the entries that were to go into this.

Every year we allowed for a couple to be added following the process of CMC filing from the laboratories. It is also a job of our group to check the respective laboratories when they add more entries in fibre optic CMC. To check if they use correct procedures and that they have good proof for their claims.

Last years with the CCPR WG for CMCs the discussion has reached new levels and a lot of opinions are heard. Many more entries are suggested and the process is speeded up. Earlier opinions from Euramet’s point of view were that we should limit our number of entries since the table would be difficult to overlook.   

The group finds that all work is better done in the international working group of CCPR and suggest to end our acctivities.