Raman, mid-infrared, near-infrared and ultraviolet–visible spectroscopy of PDMS silicone rubber for characterization of polymer optical waveguide materials
✍ Scribed by Dengke Cai; Andreas Neyer; Rüdiger Kuckuk; H. Michael Heise
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 552 KB
- Volume
- 976
- Category
- Article
- ISSN
- 0022-2860
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✦ Synopsis
Special siloxane polymers have been produced via an addition reaction from commercially available twocomponent addition materials by thermal curing. Polydimethylsiloxane (PDMS) based polymers have already been used in the optical communication field, where passive polymer multimode waveguides are required for short-distance datacom optical applications. For such purpose, materials with low intrinsic absorption losses within the spectral region of 600-900 nm wavelengths are essential. For vibrational absorption band assignments, especially in the visible and short-wave near-infrared region, the midinfrared and Raman spectra were investigated for fundamental vibrations of the siloxane materials, shedding light onto the chemistry before and after material polymerization. Within the near-infrared and long-wave visible spectral range, vibrational CAH stretching overtone and combination bands dominate the spectra, rendering an optical characterization of core and clad materials. Such knowledge also provides information for the synthesis and optical characterization, e.g., of deuterated derivatives with less intrinsic absorption losses from molecular vibrations compared to the siloxane materials studied.