The NASAs Doppler Aerosol WiNd (DAWN) lidar system needs a pulsed single frequency laser operating near 2 micron lase wavelength. We propose a new type of Tm-doped fiber for this application. The overall objective of this proposal is to demonstrate and build a single frequency near 2 micron fiber laser with pulse energy of greater than 30mJ. Tm-doped gain fiber with excellent radiation resistance against high energy radiation will be used. This proposed laser will be all-fiber PM laser with a beam quality of 1.2. In Phase II we will demonstrate and deliver a packaged 2 micron single frequency fiber laser with 30mJ pulse energy to NASA. Potential NASA Applications (Limit 1500 characters, approximately 150 words) NASA needs single frequency high pulse energy 2 micron fiber laser for wind Lidar applications. Such a fiber laser is of great interest because of the potential possibility of combining high efficiency, high output power, and retina safety together. This technical approach can also be used for CO2 measurement by using Ho-doped fiber. Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words) There are a number of
Potential NON-NASA Commercial Applications: for 1.94 micron fiber laser. This eye-safe laser source can be used to build commercial lidar for ranging and surface topography applications, be used as the light source for fiber optical sensing, fast scanning biomedical imaging, and scientific research.
