  We present the design, realization, characterization and testing of an
industrial prototype of a laser system, which is based on frequency doubling of
telecom lasers and features all key functionalities to drive a cold atom space
gradiometer based on the architecture proposed in [Trimeche et al, 2019].
Testing was performed by implementing the laser system onto a ground based
atomic sensor currently under development. The system reaches a Technology
Readiness Level (TRL) of 4, corresponding to an operational validation in a
controlled environment. The optical architecture of the system can be adapted
to other space mission scenarios.
