Low-loss passive optical waveguides based on photosensitive poly(pentafluorostyrene-co-glycidyl methacrylate)

Citation
C. Pitois et al., Low-loss passive optical waveguides based on photosensitive poly(pentafluorostyrene-co-glycidyl methacrylate), MACROMOLEC, 32(9), 1999, pp. 2903-2909
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULES
ISSN journal
0024-9297 → ACNP
Volume
32
Issue
9
Year of publication
1999
Pages
2903 - 2909
Database
ISI
SICI code
0024-9297(19990504)32:9<2903:LPOWBO>2.0.ZU;2-5
Abstract
Low-loss optical waveguides have been fabricated from fluorinated copolymer s designed to incorporate photochemical amplification based on acid catalys is. Core and cladding layers were made, for single-mode (SM) channel wavegu ides, from the poly(pentafluarostyrene-co-glycidyl methacrylate) copolymer series and, for multimode (MM) ridge waveguides, from poly(tert-butyl metha crylate-co-glycidyl methacrylate) as the cladding and poly(pentafluorastyre ne-co-glycidyl methacrylate) as core layer. The reactivity ratios for PFS a nd GMA monomers have been measured to be r(PFS) = 0.38 +/- 0.01 and r(GMA) = 0.89 +/- 0.01 in free radical polymerization. Variation of the copolymer composition allowed precise control over the refractive index measured at 5 89, 633, 1320, and 1550 nm. These amorphous copolymers were photo-cross-lin ked by contact printing and developed by wet etching to produce high qualit y ridge waveguides with very smooth top surfaces. Low loss single-mode (SM) waveguides exhibit averaged losses over eight channel waveguides as low as 0.39 dB/cm at 1320 nm and 0.42 dB/cm at 1550 nm. Thermal properties have b een examined and optical losses were measured after two different annealing s at 200 and 250 degrees C for 1 h.