The new laser has been implemented on the telescope’s elevation ring with its electronics installed on a new Nasmyth sub-platform, with the capacity to support up to three laser systems for future upgrades. The laser is projected from behind the telescope’s secondary mirror using the recently implemented center launch system (CLS) to reduce LGS spot size. We will present the new laser system and its performance with respect to power, stability, wavelength, spot size, optical repumping, polarization, efficiency, and its return with respect to pointing alignment to the magnetic field. Preliminary LGSAO performance is presented with the system returning to science operations. We will also provide an update on current and future upgrades at the WMKO.
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Jason C. Y. Chin, Peter Wizinowich, Ed Wetherell, Scott Lilley, Sylvain Cetre, Sam Ragland, Drew Medeiros, Kevin Tsubota, Greg Doppmann, Angel Otarola, Kai Wei, "Keck II laser guide star AO system and performance with the TOPTICA/MPBC laser," Proc. SPIE 9909, Adaptive Optics Systems V, 99090S (26 July 2016);