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High-power continuous-wave narrow-linewidth 253.7 nm deep-ultraviolet laser
Applied Optics
|November 14, 2017
Summary
A stable 760 mW deep-ultraviolet laser was developed for mercury atom laser cooling. This narrow-linewidth laser enables high signal-to-noise ratio spectroscopy for quantum optics applications.
Area of Science:
- Atomic Physics
- Quantum Optics
- Laser Technology
Background:
- Laser cooling of atoms requires specific wavelengths for efficient energy level transitions.
- Mercury atoms are of interest for fundamental physics research and quantum applications.
- Generating deep-ultraviolet (DUV) light efficiently can be challenging.
Purpose of the Study:
- To develop a stable, narrow-linewidth DUV laser at 253.7 nm.
- To enable laser cooling of mercury atoms using this DUV source.
- To demonstrate its utility in high-resolution spectroscopy.
Main Methods:
- Utilizing a high-power 1014.8 nm fiber laser amplifier.
- Employing two cascaded frequency-doubling stages to reach the DUV wavelength.
- Performing saturated absorption spectroscopy on mercury atoms.
Main Results:
- Achieved a stable continuous-wave output power of 760 mW at 253.7 nm.
- Demonstrated a narrow linewidth suitable for atomic transitions.
- Obtained a high signal-to-noise ratio for the saturated absorption spectrum of Hg isotopes on the 6S01-6P13 transition.
Conclusions:
- The developed DUV laser is a powerful tool for laser cooling of mercury atoms.
- This laser system has significant potential for applications in quantum optics and precision measurements.
- The methodology provides a pathway for generating other DUV wavelengths for atomic physics research.
