This viewgraph presentation reports on the development of a high power 780 nm laser suitable for space applications of laser cooling . A possible solution is to use frequency doubling of high power 1560 nm telecom lasers . The presentation shows a diagram of the frequency conversion , and a graph of the second harmonic generation in one crystal , and the use of the cascading crystals . Graphs show the second harmonic power as a function of distance between crystals , second harmonic power vs. pump power , tunability of laser systems .