Unscrambling OAM mode using digital phase-shifting in the Stokes fluctuations correlation

Area of Science:

• Optics and Photonics
• Quantum Information Science

Background:

• Orbital angular momentum (OAM) is a key property of light.
• Measuring OAM states and phase in complex light fields is challenging.

Purpose of the Study:

• To propose and demonstrate a new technique for unscrambling OAM states.
• To quantitatively measure the phase structure of random light.
• To develop a new theoretical basis for OAM analysis.

Main Methods:

• Development of a non-interferometric technique.
• Theoretical modeling and numerical simulations.
• Experimental verification using orthogonal projection for OAM mode analysis.

Main Results:

• Successful demonstration of a highly stable OAM unscrambling technique.
• Quantitative measurement of phase structure from non-imaged random light.
• Validation of the new theoretical basis through simulations and experiments.

Conclusions:

• The proposed method provides a robust and accurate way to characterize OAM.
• This technique advances the ability to analyze complex light beams.
• The findings have implications for optical communication and sensing.