Optical filters based on polymer asymmetric bragg couplers and its method of fabrication
US8396341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2009 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Apr 4, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention discloses a method for fabricating an optical filter based on polymer asymmetric bragg couplers using holographic interference techniques, soft lithography, and micro molding, which comprises following steps: prepare a UV polymer with gratings; coating photo-resister film on the UV polymer, and exposed by UV light to obtain a photo-resister mold with two grooves each having gratings; coating diluted PDMS film on the photo-resister mold, and baking the PDMS film to obtain a PDMS mold having two waveguides with gratings; placing glass substrate over the PDMS mold to form a first tunnel; injecting a precure UV polymer into the first tunnel to from a cladding layer with two grooves having gratings pattern at its bottom; placing glass slide over the cladding layer and injecting a mixed UV polymer into the grooves to form waveguide cores; placing a second glass substrate over the cladding layer, and injecting UV polymer to form an upper cladding layer laminated with the cladding layer to obtain the optical filter based on polymer asymmetric bragg couplers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.