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Updated: Aug 15, 2026
12:14
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Dual-parameter interferometric measurement using orbital angular momentum beams
Optics Express
|August 14, 2026
Summary
This study introduces a novel dual-parameter sensing system using an orbital angular momentum (OAM) beam interferometer. The system accurately measures two independent optical path parameters simultaneously, advancing OAM-based interferometry.
Area of Science:
- Optics and Photonics
- Metrology and Measurement Science
Background:
- Orbital angular momentum (OAM) beam interferometers are used for micro-phase variation sensing.
- Existing OAM interferometric systems are typically limited to single-parameter measurements.
Purpose of the Study:
- To propose and validate a novel dual-parameter measurement system based on an OAM beam interferometer.
- To enable simultaneous measurement of two independent optical path parameters.
Main Methods:
- Theoretical derivation of relationships between interferogram power, rotation angle, and phase variations.
- Application of derived relationships for phase demodulation.
- Experimental implementation and validation of the proposed dual-parameter sensing system.
Main Results:
- Theoretical measurement resolutions of 0.10° and 2 nm for the two branches.
- Experimental accuracy exceeding 99% for single-parameter measurements.
- Simultaneous dual-parameter measurement with a root mean square error (RMSE) of 3.10° for Euclidean distance.
- Experimental measurement resolutions of 0.40° and 2 nm.
Conclusions:
- The proposed OAM beam interferometer system effectively enables dual-parameter sensing.
- The system demonstrates practical applicability and high accuracy for simultaneous measurements.
- Provides valuable insights for designing advanced OAM-based interferometric measurement systems.
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