5 May 2016 UV lifetime demonstrator for space-based applications
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Abstract
A long-lived UV laser is an enabling technology for a number of high-priority, space-based lidar instruments. These include next generation cloud and aerosol lidars that incorporates a UV channel, direct detection 3-D wind lidars, and ozone DIAL (differential absorption lidar) systems. In previous SBIR funded work we developed techniques for increasing the survivability of components in high power UV lasers and demonstrated improved operational lifetimes. In this Phase III ESTO funded effort we are designing and building a TRL (Technology Readiness Level) 6 demonstrator that will have increased output power and a space-qualifiable package that is mechanically robust and thermally-stable. For full space compatibility, thermal control will be through pure conductive cooling. Contamination control processes and optical coatings will be chosen that are compatible with lifetimes in excess of 1 billion shots. The 1064nm output will be frequency tripled to provide greater than 100 mJ pulses of 355 nm light at 150 Hz. The laser module build was completed in the third quarter of 2015 at which time a series of life tests were initiated. The first phase of the lifetime testing is a 532 nm only test that is expected to complete in April 2016. The 532 nm lifetest will be followed by a 4 month half power UV life test and then a four month full power UV life test. The lifetime tests will be followed by thermal/vacuum (TVAC) and vibration testing to demonstrate that the laser optics module design is at TRL 6.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Albert, Michael Albert, Kent Puffenburger, Kent Puffenburger, Tom Schum, Tom Schum, Fran Fitzpatrick, Fran Fitzpatrick, Slava Litvinovitch, Slava Litvinovitch, Darrell Jones, Darrell Jones, Joseph Rudd, Joseph Rudd, Floyd Hovis, Floyd Hovis, } "UV lifetime demonstrator for space-based applications", Proc. SPIE 9879, Lidar Remote Sensing for Environmental Monitoring XV, 987909 (5 May 2016); doi: 10.1117/12.2228371; https://doi.org/10.1117/12.2228371
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