Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 4, 2009
|
|
---|---|---|
Article Number | 09026 | |
Number of page(s) | 6 | |
DOI | https://doi.org/10.2971/jeos.2009.09026 | |
Published online | 01 June 2009 |
Regular papers
Optical bonding with fast sol-gel
Electro-optics Division, Soreq NRC, Yavne 81800, Israel
Received:
9
March
2009
We investigate here the properties of fast sol-gel for optical bonding. The precursors of the fast sol-gel material are organically modified alkoxides generating a transparent hybrid (organic-inorganic) substance with silica glass-like properties whose index of refraction can be modified by the addition of various metal-oxides. The fast sol-gel method consists of rapid fabrication of a viscous resin and its subsequent dilution for long shelf life use. This material, when used as an adhesive offers the option of either a thermal or UV curing procedure. We demonstrate a bonding strength of ∼ 10 MPa when a 15 µm layer is applied between two glass elements. The bonding remained stable after an extensive −40°C – 120°C temperature cycling with minimal residual solvent evaporation at 150°C. The fast sol-gel material was tested for optical bonding between silica bulks, between silica bulk and silicon wafers and as an adhesive in silica fibre couplers.
Key words: optical bonding / sol-gel / ORMOSILs / refractive index / thermal stability
© The Author(s) 2009. All rights reserved.
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