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.