Patent ID: 7386017
Filing Date: 2008-06-10
Classification: G02B

Abstract:
1. A synthetic laser guide star apparatus that corrects for atmospheric distortions in observing a celestial object, comprising: a telescope, adaptive optics, a Nd-doped fiber pump fiber laser having a Nd-doped fiber amplifier operating to produce amplified radiation between 880 nm and 960 nm, an Erbium-doped fiber pump fiber laser having an Er-doped fiber amplifier operating to produce amplified radiation between 1524 nm and 1650 nm, a frequency-conversion system operatively connected to said Nd-doped fiber pump fiber laser and said Erbium-doped fiber pump fiber laser that mixes said amplified radiation between 880 nm and 960 nm and said amplified radiation between 1524 nm and 1650 nm and generates light at a frequency at or near 589 nm, and a system for directing said light at a frequency at or near 589 nm to said telescope, to said adaptive optics, and toward said celestial object providing the synthetic guide star that corrects for atmospheric distortions.