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Updated: Mar 28, 2026
12:14
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
22.6K
Effect of residual phase gradients in optical null interference.
Optics Letters
|December 24, 2015
Summary
Residual phase gradients in optical interference cause beam rotation. This study reveals insights into orbital angular momentum changes during energy redistribution in Gaussian beam interference.
Area of Science:
- Optics and Photonics
- Quantum Optics
- Interferometry
Background:
- Optical interference is fundamental, but residual phase gradients can introduce complex effects.
- Gaussian beams are widely used in optical systems, and their interference properties are crucial.
Purpose of the Study:
- To propose and investigate a scheme for studying residual phase gradients in optical interference.
- To analyze the optical field rotation induced by these gradients in a Sagnac interferometer.
Main Methods:
- Utilizing a Sagnac interferometer configured for null output.
- Introducing a variable linear phase sweep across the null point.
- Observing optical field rotation orthogonal to the phase sweep.
Main Results:
- Demonstrated that a negligible residual phase gradient can cause significant optical field rotation.
- Observed beam rotation around its propagation axis, indicating associated orbital angular momentum.
Conclusions:
- The experimental results provide insights into momentum changes during energy redistribution in optical interference.
- This work highlights the importance of accounting for residual phase gradients in optical systems.
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