Safran Corporate Ventures joined the fibre optic technology developer's existing investors for a $5.7m round that will support international sales.

France-based optical fibre component manufacturer CaiLabs has raised €5m ($5.7m) from investors including Safran Corporate Ventures, the strategic investment vehicle for aerospace and defence company Safran.

Safran was joined by CaiLabs’ current shareholders, the company said. It had previously raised €3.5m from investors including venture capital firms Innovacom and Starquest Capital, seed-stage VC fund Kima Ventures and undisclosed angel investors.

Founded in 2013, CaiLabs is developing light-shaping components used to maximise the efficiency of fibre optics used in the telecommunications…