Custom fiber-optic bundles, feedthroughs & patchcords for extreme environments.

SEDI-ATI Fibres Optiques, a French company founded in 1951, has been a subsidiary of FOG • Fiber Optics Group since 2023, an international group dedicated to innovation and sustainability in the field of optical fiber assemblies.

We manufacture customized passive fiber-optic solutions and components that withstand complex and extreme environments, including achromatic multimode couplers, multimode wavelength division multiplexers, fiber optic hermetic feedthroughs, bundles and arrays, special patchcords, and fiber optic deployable spools.

We address applications in niche markets including industry, energy, defense, and aerospace. The applications of our products and solutions are as diverse as opto-pyrotechnics, cryogenics, vacuum, pressure, or spectroscopy.