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Chirp-free nanosecond laser amplifier for precision spectroscopy
Optics Letters
|January 1, 1997
Summary
This study introduces a novel laser dye mix to minimize optical phase shifts in pulsed dye amplifiers. This method enhances frequency stability, improving precision far-UV wavelength measurements.
Area of Science:
- Laser Physics
- Spectroscopy
- Optical Engineering
Background:
- Optical phase perturbations limit precision in pulsed laser systems.
- Nanosecond pulsed dye amplifiers are crucial for various spectroscopic applications.
- Accurate wavelength measurements are essential in fundamental physics research.
Purpose of the Study:
- To develop a method for reducing optical phase perturbations in nanosecond pulsed dye amplifiers.
- To enhance the frequency stability of amplified laser pulses.
- To improve the accuracy of far-ultraviolet (UV) wavelength measurements.
Main Methods:
- Tailoring laser dye composition to achieve near-zero susceptibility at the operating wavelength.
- Utilizing a nanosecond pulsed dye amplifier setup.
- Implementing the optimized dye mix in precision far-UV spectroscopy of H(2).
Main Results:
- Optical phase perturbations were significantly reduced.
- Frequency shifts were limited to less than 3 MHz.
- Frequency chirping was reduced to less than 10 MHz.
- Amplified power loss was negligible.
- Accuracy of H(2) far-UV wavelength measurements improved to approximately 7 parts in 10(9).
Conclusions:
- The developed laser dye mix effectively minimizes optical phase perturbations.
- This technique offers a simple yet powerful method for enhancing laser pulse stability.
- The improved frequency stability enables unprecedented accuracy in precision spectroscopy.
