Dispersion-controlled hollow core fiber for phase matched harmonic generation

Area of Science:

• Physics
• Optics
• Materials Science

Background:

• Quasi-phase matched harmonic generation is crucial for producing coherent X-rays.
• Controlling phase in gas media for harmonic generation presents significant challenges.

Purpose of the Study:

• To theoretically evaluate a new design for quasi-phase matched harmonic generation in a gas medium.
• To demonstrate enhanced harmonic yield using a structured hollow core fiber.

Main Methods:

• Theoretical modeling of harmonic generation within a hollow core fiber.
• Incorporation of periodically introduced thick glass plates for phase control.
• Analysis of X-ray transmission through perforations in the glass plates.

Main Results:

• The proposed design allows for effective phase control of the fundamental light.
• A predicted increase in harmonic yield of up to three orders of magnitude.
• The generated X-rays can be transmitted through small holes in the plates.

Conclusions:

• The novel design significantly enhances harmonic yield in gas media.
• This configuration can be considered a phase-locked traveling-wave X-ray laser.
• The findings pave the way for advanced X-ray generation techniques.