  We present the complete characterization of a laser setup for rubidium
cooling dedicated to space applications. The experimental setup is realized
with commercial off-the-shelf fiber components suitable for space applications.
By frequency doubling two fiber laser diodes at 1560 nm, we produce the two
optical frequencies at 780 nm required for atomic cooling of $^{87}$Rb. The
first laser is locked on saturated absorption signal and long term frequency
drift has been canceled using a digital integrator. The optical frequency of
the second laser is controlled relatively to the first one by a frequency
comparison method. A full characterization of the setup, including frequency
stability evaluation and frequency noise measurement has been performed. The
optical frequency doubling module has been submitted to environmental tests to
verify its compatibility with space applications.
