Low index, optically clear potting gel – protects photonics and fibre optics modules

Citation

(2005), "Low index, optically clear potting gel – protects photonics and fibre optics modules", Microelectronics International, Vol. 22 No. 1. https://doi.org/10.1108/mi.2005.21822aad.010

Low index, optically clear potting gel – protects photonics and fibre optics modules

Low index, optically clear potting gel – protects photonics and fibre optics modules

Lightspane™ LS-3238 optical gel is a soft encapsulation material designed especially to protect sensitive photonics and fibre optics modules from mechanical or thermal shock, dust and moisture. The product has a refractive index of 1.38 for aiding total internal reflection in silica fibre, and optical glass and plastic substrates.

LS-3238 is optically clear, permitting post-cure inspection of delicate assemblies. Its ultra-low gel modulus allows large strain without allowing excessive stress build-up in sensitive fibre or wire bond runs.

Delivered in convenient self-mixing/ dispensing cartridges, LS-3238 features a long pot life (8 h) for optimum convenience in an assembly environment. It cures in 24 h at room temperature without the need for UV exposure or high temperature bake. Service temperatures are -40 to +200°C (+260°C for 1-2 min for soldering operations). From stock 50 cc cartridges are available for prototyping and testing.

A four-page technical data sheet describing material properties including optical transmission and refractive index vs wavelength, and tips on substrate preparation and cure schedules, is available from UK distributor Intertronics.

For more information visit the Web site: www.intertronics.co.uk/lightspan