TY - CONF A1 - Daum, Werner A1 - Czepluch, Wolf T1 - Reliability of Step-Index and Multi-Core POF for Automotive Applications T2 - POF 2003 ; 12th International Conference on Polymer Optical Fiber CY - Seattle, WA, USA DA - 2003-09-14 PY - 2003 SP - 6 EP - 9 CY - Seattle, Wash. AN - OPUS4-2724 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Daum, Werner T1 - Standardised and Particular Methods for Reliability Testing of Polymer Optical Fibres T2 - 2nd Asia-Pacific Polymer Fibre Optics Workshop CY - Hong Kong, China DA - 2003-01-03 PY - 2003 SP - 15 EP - 20 CY - Hong Kong AN - OPUS4-2141 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Lebid, Solomija A1 - Habel, Wolfgang A1 - Daum, Werner T1 - How reliable measure composite-embedded FBG sensors under the influence of transverse and point-wise deformations? T2 - 16th International Conference on Optical Fiber Sensors (OFS-16) CY - Nara, Japan DA - 2003-10-13 PY - 2003 SN - 4-89114-036-4 SP - 46 EP - 49 PB - IEICE CY - T¯oky¯o AN - OPUS4-2887 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lebid, S. A1 - Habel, Wolfgang A1 - Daum, Werner T1 - How to reliably measure composite-embedded fibre Bragg grating sensors influenced by transverse and point-wise deformations? N2 - Embedded conventional fibre Bragg grating (FBG) sensors with acrylate coating have been chosen for monitoring novel textile-reinforced composite materials with a complicated wavy structure as a result of reinforcing textures. Problems of monitoring this type of material occur due to the harsh fabrication technology of the composite and its complicated structure. Embedded fibre sensors are exposed to the influence of transverse and point-wise deformations. To what extent will these effects influence the measurement signal of a sensor? Temperature cycles, tension and vibration tests were carried out to answer this question. Transverse and point-wise deformation and micromechanical indentation tests on non-embedded FBG sensors were carried out to clarify the reliability of recorded signals. KW - FBG sensors KW - Textile-reinforced composites KW - Measurement reliability PY - 2004 UR - http://www.iop.org/EJ/abstract/0957-0233/15/8/001/ DO - https://doi.org/10.1088/0957-0233/15/8/001 SN - 0957-0233 SN - 1361-6501 VL - 15 SP - 1441 EP - 1447 PB - IOP Publ. Ltd. CY - Bristol AN - OPUS4-3846 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Daum, Werner T1 - Chemiluminescence investigation of high temperature and humidity again of PMAA based polymer optical fibres (POF) T2 - The 12th International Conference on polymer Optical Fibres CY - Seattle, WA, USA DA - 2003-09-14 PY - 2003 AN - OPUS4-5103 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Daum, Werner T1 - Optical fibers for adverse environment T2 - Technowatch 2003 CY - Brussels, Belgium DA - 2003-10-29 PY - 2003 AN - OPUS4-5139 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Daum, Werner T1 - Standardised and particular methods for reliability testing of polymer optical fibres T2 - 2nd Asia-Pacific Polymer Optical Fibre Workshop CY - Hong Kong, China DA - 2003-01-03 PY - 2003 AN - OPUS4-5109 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Daum, Werner T1 - Reliability of step-index and multi-core POF for automobile applications T2 - 12th International Conference on Polymer Optical Fibres CY - Seattle, WA, USA DA - 2003-09-14 PY - 2003 AN - OPUS4-5111 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Daum, Werner ED - Koike, Y. T1 - Standards and Specifications for POF Characterisation T2 - 13th International Plastic Optical Fibres Conference 2004 CY - Nuremberg, Germany DA - 2004-09-27 KW - Plastic optical fibres KW - Standards KW - Specification KW - Testing KW - Characterisation PY - 2004 SN - 3-905084-70-8 SP - 133 EP - 139 PB - AKM Congress Service CY - Basel AN - OPUS4-5231 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Appajaiah, Anilkumar A1 - Wachtendorf, Volker A1 - Daum, Werner T1 - Characterization of thermo-oxidative stability of polymer optical fibers using chemiluminescence technique N2 - The thermo-oxidative stability of commercially available polymer optical fibers (POFs) and their components (cores and claddings) was investigated. All the bare POFs (core and cladding only) studied here were based on poly(methyl methacrylate) (PMMA) core. The fibers were exposed to 100 °C/low humidity for about 4200 h. Chemiluminescence (CL) technique was applied to investigate the thermo-oxidative stability and for measuring the transmission loss during exposure a prototype device called multiplexer was used. POFs exhibited variation in thermo-oxidative stability although they possessed identical core material PMMA. This was due to difference in the chemical compositions of claddings. Claddings were more susceptible to the thermo-oxidative degradation compared to cores. The thermo-oxidative degradation of both the cladding and the core was found in POFs as a result of climatic exposure. POFs showed an early drop-off followed by a slow decline of transmission. The early drop-off of transmission was attributed to physical changes like thermal expansion and the slow decline of transmission to chemical changes like oxidative degradation of POFs. A good linear relationship between optical transmission stability and thermo-oxidative stability of POFs was established from these studies. KW - Polymer optical fibers (POFs) KW - Chemiluminescence (CL) KW - Thermo-oxidative stability KW - Aging KW - Optical transmission stability PY - 2006 DO - https://doi.org/10.1016/j.polymdegradstab.2006.05.006 SN - 0141-3910 SN - 1873-2321 VL - 91 IS - 11 SP - 2605 EP - 2613 PB - Applied Science Publ. CY - London AN - OPUS4-13984 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -