17 September 2013 Development of a TRL-5 conductively-cooled 2-micron laser transmitter for coherent doppler wind lidar system
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Abstract
Compact, reliable and conductively-cooled solid state 2-micron laser technology is a critical component of the 3-D Winds mission envisioned in the NRC Decadal survey. In order to mature the 2-micron laser technology to a Technical Readiness Level of 5 (TRL-5), we are developing a conductively-cooled single-frequency 2-micron laser meeting the performance requirements for this wind LIDAR mission and able to operate in vacuum. Conductive cooling is accomplished via heat pipes attached to a reconfigurable condenser plate. The ruggedized mechanical design is based upon design concepts used and validated for the NASA Ice, Cloud and Land Elevation Satellite-2 (ICESat-2) Mission. Achieving TRL-5 has particular challenges for this technology due to its unique requirements. The cold operating temperature mandated by the laser crystal (Ho:Tm:LuLF) and the long resonator required to generate <100 ns pulsewidths needed to maximize the LIDAR resolution, make stabilizing the laser more difficult than many other lasers. The completion and demonstration of this laser provides a platform for further maturation of solid state 2 micron laser technology to the TRL-6 required for space-based deployment.
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Timothy Shuman, Floyd E. Hovis, Upendra N. Singh, Mulugeta Petros, Jirong Yu, Michael J. Kavaya, "Development of a TRL-5 conductively-cooled 2-micron laser transmitter for coherent doppler wind lidar system", Proc. SPIE 8872, Lidar Remote Sensing for Environmental Monitoring XIV, 887205 (17 September 2013); doi: 10.1117/12.2024358; https://doi.org/10.1117/12.2024358
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