Fabrication of an elastomeric rib waveguuide Bragg grating filter

Cheng-Sheng Huang, Edwin Yue-Bun Pun, Wei Chih Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


We report the design and fabrication of a Bragg grating device on a silicone-based elastomer rib waveguide, constructed using solvent-assisted microcontact molding and polymer casting techniques. The waveguide design utilizes polydimethylsiloxane (PDMS) and hard polydimethylsiloxane (hPDMS) polymers as core and cladding materials, with a period of ̃0.55 ̃m, a depth of ̃350 nm, and a grating length of 6 mm. Fabrication is relatively simple, with the hPDMS/PDMS waveguide and gratings cast from a two-layer mold made of a phenolic resin-based positive photoresist and an epoxy Novolak resin-based negative photoresist. The mold we have designed has a demonstrated operational lifespan in excess of ten successful waveguide fabrications. The transmission spectra of the resulting gratings were measured, with test results showing a band-rejection gain of -17 dB and a 3 dB bandwidth of ̃3 nm at transmission.

Original languageEnglish
Pages (from-to)1256-1262
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Issue number6
StatePublished - 1 Jun 2009

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