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Widely Tunable Two-Color Free-Electron Laser on a Storage Ring
1FEL Laboratory, TUNL and Department of Physics, Duke University, Durham, North Carolina 27708-0319, USA.
Physical Review Letters
|November 14, 2015
Summary
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.
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.
