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Updated: Sep 11, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Bidirectional high-purity structured light beams transformation based on multi-plane light conversion.

Zehui Lu, Dongye Xu, Changjin Li

|August 13, 2025

Summary

This summary is machine-generated.

We developed a bidirectional structured light beam conversion method using multi-plane light conversion (MPLC). This technique achieves high mode purity and precise loss control for optical communications and quantum information processing.

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Area of Science:

Optics and Photonics
Quantum Information Science
Optical Communications

Background:

Structured light beams are vital for advanced applications like optical communications and quantum information processing.
High-purity generation and conversion of these beams are critical for performance.

Purpose of the Study:

To propose a bidirectional method for high-purity structured light beam transformation.
To enable precise control over system loss and mode purity.
To demonstrate mutual conversion of orthogonal modes.

Main Methods:

Utilized the multi-plane light conversion (MPLC) technique.
Demonstrated bidirectional conversion between Gaussian beams array (GBA) and perfect vortex beams (PVB).
Validated the method with multi-wavelength and complex structured light beams.

Main Results:

Achieved a signal-to-noise ratio (SNR) over 30 dB for 7-mode conversion with 5.23 dB loss.
Obtained SNR above 25 dB for 13-mode generation with insertion loss below 5.45 dB.
Confirmed method validity through complex field distribution generation.

Conclusions:

The proposed MPLC-based bidirectional approach offers precise control over structured light beams.
This method is suitable for high-dimensional quantum communications and advanced optical systems.
Advances MPLC capabilities for future structured-light applications.