Development of line-narrowed diode pumps sources for DPAL systems
Higher power wavelength-stabilized pump sources operating in the 78x-nm to 79xnm band are expected to enable high-energy CW laser systems based on low pressure alkali gasses (such as Cs or Rb). Under the proposed program, nLight will design, demonstrate, and deliver to the MDA (or recipient of their choosing) a high-brightness, wavelength-locked, wavelength-tunable 780 nm fiber-coupled laser diode for use in diode-pumped Rb vapor alkali laser (DPAL) experiments. The anticipated maximum power of the module is 100W and it is expected to deliver>50% conversion efficiency as measured from the output of a 200µm, 0.22 NA fiber. The module will be wavelength-locked to 0.05 nm FWHM. To achieve long-term wavelength stability, integrated wavelength tunability will be included to provide the user a center wavelength adjustment of up to 0.3 nm, providing compatibility for closed-loop control of the wavelength.
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