For RamanBC, we are developing an optical bread board which combines the light from two optical fiber via an acousto-optic modulator into a third fiber. The acousto-optic modulator allow us to shift the frequency of the light and create extremely well controlled pulses. We aim at frequency control in the Hertz region and amplitude control exceeding 100dB. This project will be carried out in collaboration with excel, which is Europe's leading company for navigation sensors and producer of  a Quantum gravity sensor based on atom interferometry. The technology that we are creating for RamanBC is aimed at the first space mission, including a quantum gravity sensor (CARIOQA).