Abstract: An optical device is described comprising at least one fiber-optic component arrange inside said device and a particular polymer composition capable of holding said optical component(s) in a predetermined position and protecting them inside said device. The polymer composition is a silicone elastomer obtained by crosslinking a mixture comprising at least one polysiloxane containing two or more hydrogen-siloxane functional groups of formula >SiH—O—, and at least one polysiloxane containing at least two vinyl groups of formula —CH═H2, where said polysiloxane are reacted in an amount such that the molar ratio between the hydrogen-siloxane groups and the vinyl groups is less than or equal to 1:1. The polymer composition has extremely low emission of hydrogen, less than 1 cm3 per kg of composition.

Abstract: An optical device is described, comprising a fibre-optic component, such as a fibre grating, which is associated with a predetermined transfer function, capable of being placed in a plurality of adjacent windings. Furthermore, the optical device is provided with a rigid housing capable of containing the said fibre-optic component, characterized in that it contains at least one separating element for physically separating the windings of the said plurality so as to prevent mutual contact through superposition and an element for fixing the said fibre-optic component capable of holding the said component in a stable position. The solution makes it possible to avoid undesirable changes of the transfer function that can occur during placement of the fibre-optic component in the housing and/or during the life of the device.

Abstract: An optical device is described comprising at least one fibre-optic component arranged inside the said device and a particular polymer composition capable of holding the said optical components in a predetermined position and protecting them inside the said device. The polymer composition is a silicone elastomer obtained by crosslinking a mixture comprising at least one polysiloxane containing two or more hydrogen-siloxane functional groups of formula >SiH—O— at least one polysiloxane containing at least two vinyl groups of formula —CH═CH2, where the said polysiloxanes are reacted in an amount such that the molar ratio between the hydrogen-siloxane groups and the vinyl groups is less than or equal to 1:1. The said polymer composition has extremely low emission of hydrogen, less than 1 cm3 per kg of composition.