TY - THES A1 - Appajaiah, Anilkumar T1 - Climatic Stability of Polymer Optical Fibers (POF) N2 - Three of the five POF samples are studied more in detail to realize the effects of individual parameters and for forecasting longterm optical stability by short-term exposure tests. T3 - BAM Dissertationsreihe - 9 KW - Climatic Stability of Polymer Optical Fibers (POF) PY - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-1495 SN - 978-3-86509-302-7 SN - 1613-4249 VL - 9 SP - 1 EP - 176 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-149 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Appajaiah, Anilkumar A1 - Jankowski, Lukasz T1 - A review on aging or degradation of polymer optical fibers (POFs) - polymer chemistry and mathematical approach T2 - 10th POF 2001 ; 10th International Plastic Optical Fibres Conference CY - Amsterdam, The Netherlands DA - 2001-09-27 PY - 2001 SN - 3-905084-67-8 SP - 317 EP - 324 CY - Amsterdam AN - OPUS4-1169 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Appajaiah, Anilkumar A1 - Kretzschmar, Hans-Jürgen T1 - Climatic aging or degradation of plastic optical fibres (POFs) - Chemical analysis T2 - 11th POF 2002 ; 11th International Plastic Optical Fibers Conference ; 11th International POF Conference CY - Tokyo, Japan DA - 2002-09-18 PY - 2002 SP - 213 EP - 216 CY - T¯oky¯o AN - OPUS4-1579 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Appajaiah, Anilkumar A1 - Wachtendorf, Volker A1 - Jankowski, Lukasz T1 - Chemiluminescence investigation of high temperature and humidity aging of PMMA based polymer optical fibres (POF) T2 - POF 2003 ; 12th International Conference on Polymer Optical Fiber CY - Seattle, WA, USA DA - 2003-09-14 PY - 2003 SP - 152 EP - 155 CY - Seattle, Wash. AN - OPUS4-2665 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Jankowski, Lukasz A1 - Bunge, Ch.-A. A1 - Zubia, J. A1 - Appajaiah, Anilkumar T1 - Modelling of light propagation through aged and non-aged POFs T2 - POF 2003 ; 12th International Conference on Polymer Optical Fiber CY - Seattle, WA, USA DA - 2003-09-14 PY - 2003 SP - 148 EP - 151 CY - Seattle, Wash. AN - OPUS4-2666 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Appajaiah, Anilkumar A1 - Kretzschmar, Hans-Jürgen T1 - Climatic Aging or Degradation of Plastic Optical Fibres (POFs): Chemical Analysis T2 - 11th International POF Conference 2002 CY - Tokyo, Japan DA - 2002-09-18 PY - 2002 AN - OPUS4-3550 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Appajaiah, Anilkumar A1 - Kretzschmar, Hans-Jürgen T1 - Climatic aging of PMMA based polymer optical fibres (POF) - Analysis of polymer degradation T2 - 3rd International IEEE Conference on Polymers and Adhesives in Microelectronics and Phonics ; 3rd Polytronics 2003 CY - Montreux, Switzerland DA - 2003-10-21 KW - Polymer optical fibres KW - Climatic aging KW - Degradation KW - Humidity PY - 2003 SN - 2-8481-3023-7 SP - 57 EP - 62 PB - TIMA Laboratory CY - Grenoble AN - OPUS4-2702 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Appajaiah, Anilkumar A1 - Kretzschmar, Hans-Jürgen T1 - Climating aging of PMMA based polymer optical fibres (POF): Analysis of polymer degradation T2 - 3th International IEEE Conference on polymers and adhesives in microelectronics and photonics (Polytronic 2003) CY - Montreux, Switzerland DA - 2003-10-21 PY - 2003 AN - OPUS4-5104 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Appajaiah, Anilkumar T1 - Climating aging of polymer optical fibres (POF) - Chemical investigations T2 - 17. Fachgruppentreffen der ITG-Fachgruppe 5.4.1 "Optische Polymerfasern", Institut für Mikrotechnik CY - Mainz, Germany DA - 2003-11-04 PY - 2003 AN - OPUS4-5106 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Appajaiah, Anilkumar A1 - Wachtendorf, Volker ED - Koike, Y. T1 - Aging behavior of polymer optical fibers: Characterization of thermo-oxidative stability by chemiluminescence T2 - 13th International Plastic Optical Fibres Conference 2004 CY - Nuremberg, Germany DA - 2004-09-27 KW - Climatic exposure KW - Chemiluminescence KW - POF PY - 2004 SN - 3-905084-70-8 SP - 166 EP - 173 PB - AKM Congress Service CY - Basel AN - OPUS4-5973 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 U6 - 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 - TY - JOUR A1 - Appajaiah, Anilkumar A1 - Wachtendorf, Volker A1 - Daum, Werner T1 - Climatic exposure of polymer optical fibers: Thermooxidative stability characterization by chemiluminescence N2 - The optical transmission stability was investigated for commercially available polymer optical fibers (POFs) which were exposed to a climate of 92°C and 95% relative humidity for about 3300 h. The optical transmission stability of POFs was correlated to their thermooxidative stability. POFs possessed identical core material, poly(methyl methacrylate), but they differed in the materials used for the claddings. The optical transmission was measured online using a prototype device called multiplexer. The chemiluminescence (CL) technique was applied to characterize the thermooxidative stability and degradation of POFs. CL analysis reveals the thermooxidative degradation of bare POFs (core and cladding), predominantly of the claddings, as a result of climatic exposure. Ultraviolet-visible transmittance measurements demonstrated more changes in the claddings as compared to the cores due to degradation. The CL and optical measurements data indicated that the optical transmission stability of POFs was dependent mainly on the thermooxidative stability of the claddings and their chemical compositions. KW - Ageing KW - Polymer optical fiber KW - Degradation KW - Chemiluminescence KW - Transparency PY - 2007 U6 - https://doi.org/10.1002/app.23955 SN - 0021-8995 SN - 1097-4628 VL - 103 IS - 3 SP - 1593 EP - 1601 PB - Wiley InterScience CY - Hoboken, NJ AN - OPUS4-19072 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -