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Widely Tunable Two-Color Free-Electron Laser on a Storage Ring.

Y K Wu1, J Yan1, H Hao1

  • 1FEL Laboratory, TUNL and Department of Physics, Duke University, Durham, North Carolina 27708-0319, USA.

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|November 14, 2015
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This study demonstrates a novel two-color free-electron laser (FEL) capable of simultaneous infrared and ultraviolet lasing. Researchers achieved independent wavelength tuning and controlled power sharing, advancing multi-wavelength laser technology.

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Area of Science:

  • Laser Physics
  • Photonics
  • Accelerator Science

Background:

  • Free-electron lasers (FELs) offer broad wavelength tunability.
  • Simultaneous multi-wavelength lasing is desirable for various applications.
  • Previous storage ring FELs have limitations in multi-color operation.

Purpose of the Study:

  • To present the first experimental results of a novel two-color storage ring FEL.
  • To demonstrate simultaneous lasing at infrared (IR) and ultraviolet (UV) wavelengths.
  • To showcase independent wavelength tuning and controlled power sharing.

Main Methods:

  • Utilized a novel two-color storage ring FEL configuration.
  • Employed three undulators and a pair of dual-band mirrors.
  • Conducted experiments to demonstrate simultaneous IR and UV lasing, harmonic operation, and power control.

Main Results:

  • Achieved simultaneous lasing in IR (~720 nm) and UV (~360 nm).
  • Demonstrated wide-range independent wavelength tuning (60 nm in IR, 24 nm in UV).
  • Realized two-color harmonic operation and stable power sharing between wavelengths.

Conclusions:

  • The novel two-color FEL successfully achieves simultaneous, tunable IR and UV lasing.
  • This technology enables flexible multi-wavelength operation with good power control.
  • The findings pave the way for advanced applications requiring simultaneous dual-color laser sources.