Optimisation of tailored diamond coating conditions onto optical fibres through the Taguchi method

•Optimisation of tailored diamond coating conditions on optical fibres is proposed.•The deposition conditions by HFCVD were tailored through the Taguchi method.•Parameters: deposition time, pressure, power, gases flow, distance filament-fibre.•A coalescent nanocrystalline diamond film was obtained.•The obtained diamond crystals size is of about 100 nm in average.

The characterization of different diamond coatings onto optical fibres is presented. The experimental conditions of each deposition were determined by the Taguchi method, considering five different parameters at four levels. With these experiences it was intended to find the suitable diamond deposition conditions for the optical fibres coating. The application of the Taguchi method demonstrated to be a fundamental tool in the targeting of the appropriate conditions to coating the fibre.