Tunable chromatic dispersion system using a geometric phase lens and refractive lens pair

Area of Science:

• Optics and Photonics
• Metamaterials
• Optical Engineering

Background:

• Chromatic dispersion is a critical parameter in optical systems, affecting spectral resolution and imaging quality.
• Traditional methods for tuning chromatic dispersion often have limited ranges or complex setups.
• Geometric phase lenses offer unique polarization-dependent properties for optical manipulation.

Purpose of the Study:

• To develop and demonstrate a novel tunable chromatic dispersion system.
• To leverage the dual-mode (convex/concave) capability of geometric phase lenses for dispersion control.
• To evaluate the system's performance for applications like chromatic confocal sensing.

Main Methods:

• Development of a system combining a geometric phase lens and a refractive lens pair.
• Control of chromatic dispersion by adjusting the distance between the lenses.
• Theoretical analysis, modeling, simulation, and experimental verification of the system's performance.
• Investigation of factors influencing spectral resolution.

Main Results:

• Successful demonstration of a tunable chromatic dispersion system.
• Achieved a wide tunable chromatic dispersion range from -3.8 mm to 4.4 mm.
• Verified the system's performance through theoretical and experimental validation.
• Identified key factors affecting spectral resolution in chromatic confocal sensor applications.

Conclusions:

• The developed geometric phase lens-based system provides a wide and tunable range of chromatic dispersion.
• The system's design offers advantages over traditional approaches for dispersion control.
• The tunable chromatic dispersion system shows significant potential for advanced optical sensing applications, particularly chromatic confocal microscopy.