15-20 June 2014
Laurentian University / Université Laurentienne
America/Toronto timezone
Welcome to the 2014 CAP Congress! / Bienvenue au congrès de l'ACP 2014!

Single mode fibre transmission apparatus, measuring light where it counts

17 Jun 2014, 14:15
C-206 (Laurentian University / Université Laurentienne)


Laurentian University / Université Laurentienne

Sudbury, Ontario
Oral (Non-Student) / orale (non-étudiant) Industrial and Applied Physics / Physique industrielle et appliquée (DIAP-DPIA) (T2-5) Biophotonics I - DAMOPC-DIAP / Biophotonique I - DPAMPC-DPIA


Mr Chris F. Dimas (Spectral Applied Research)


Measuring fine loss in transmission of single mode fiber when coupled with 405nm laser light requires a sensitive apparatus as closed loop feedback systems are not commercially available. A stable laser and detector system are described which measure changes in transmission to within 0.02% change per hour over a 17-hour period. This measurement apparatus has proved useful in both pre-screening fibre systems for manufacturing, but also for determining the root cause of failure in the fibre. The transmission loss may be monitored with the detector positioned directly at the fibre, or at the focus of a relay optic placed after the fibre. Alternatively, the beam at the focus of the relay optic may be profiled on a CCD camera over time. The various measurement techniques are presented, and their use in determining the root cause of failure in transmission of the fiber. Some of various causes of failure include solarization of the fibre, contamination of the endface of the fibre, laser–induced periodic surface structure (LIPSS). Directly measuring for these requires destructive tests using for example atomic force microscopy or electron microscopy, whereas our measurement apparatus potentially provides for an indirect non-destructive means of determining the root cause of failure.

Primary author

Mr Chris F. Dimas (Spectral Applied Research)


Mr Anthony Knottenbelt (Spectral Applied Research) Dr Peter Sinclair (Spectral Applied Research)

Presentation Materials