Fibertek, Inc. manufactured the laser transmitters
for the NASA/Ball Aerospace CALIPSO space-based lidar program. The
CALIPSO mission is designed to measure global atmospheric aerosols from
a space-based platform. Fibertek has delivered a prototype
space-qualified laser and two mission units jointly funded by Ball Aerospace & Technologies
Corp. (BATC) and NASA
Langley Research Center. The prototype laser was tested extensively
to validate the design lifetime of >3 x 109 shots.
Qualification of the flight units
began at the subassembly level, continued with engineering unit
versions of the key modules, and then concluded with formal
qualification of the two flight units. Particular
attention was given to validation of the vacuum seal design since it
was required to maintain pressure for the planned three-year mission. Fibertek delivered two laser systems in 2003
and the flight lasers were integrated onto mission payload in 2005.
The CALIPSO mission was launched on
April 28, 2006. The health of the
electronics and internal pressure was verified for both lasers two
weeks later. Laser Transmitter #2 was
first operated at full power on May 23, 2006. After
a number of startup procedures, the full lidar system began operation
on June 6, 2006 and has been in near continuous operation since. As of September 2008 the lidar system was
operating well with nearly 1.5 billion shots logged.
The laser transmitter output has remained
stable to within 5% of initial performance both in the infrared and
visible output channels.