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SodiumStar

High-power guide star laser @ 589 nm

  • Guide star laser for adaptive optics systems
  • Excitation of atmospheric Sodium @ 589nm
  • > 20W cw output power, linewidth < 5 MHz
  • 2 W version available for laser cooling of Sodium
  • First commercial off-the-shelf sodium guide star laser for astronomical adaptive optics
  • Fully integrated turn-key system
  • Repumper integration for highest photon return
  • Commissioned and in science operation at ESO’s Very Large Telescope and Keck Observatory

The SodiumStar system is a high-power “guide star” laser designed for adaptive optics control in ground-based telescopes. It is based on resonant frequency doubling of an infrared DFB diode laser with subsequent Raman fiber amplifier. More than 20 W are attained at the Sodium wavelength of 589 nm, with a spectral width of 5 MHz. The DL RFA SHG pro, a modified, sub MHz linewidth version with moderate power (2 W) is available for laser cooling experiments.

Guide star laser for adaptive optics system at the Very Large Telescope (VLT) at Paranal, Chile. Challenges for laser operation: Altitude, earthquake-resistant design and gravity-invariant operation. TOPTICA's guide star laser delivers a constant ouput power of 22 W at 589 nm.

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