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Updated: Jun 17, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Common-path laser interferometer.

Xing-Hua Qu¹, Li-Hua Wang, Yun-Xia Fu

¹State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China. quxinghua@tju.edu.cn

|December 18, 2009

Summary

This summary is machine-generated.

A novel common-path laser interferometer utilizes shared optical paths for enhanced performance. This laser Doppler and polarization interference system demonstrates feasibility with high resolution (0.72 nm) and velocity measurement capabilities.

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Area of Science:

Optics and Photonics
Metrology

Background:

Traditional interferometers often suffer from environmental noise and mechanical instability due to separate optical paths.
Developing robust interferometric systems with improved stability and precision is crucial for advanced measurement applications.

Purpose of the Study:

To introduce and validate a novel common-path laser interferometer design.
To demonstrate the feasibility and performance of a system integrating Laser Doppler and laser polarization interference technologies.

Main Methods:

Implementation of a common-path optical design where both interferometer arms share the same physical path.
Integration of Laser Doppler velocimetry and laser polarization interference principles within the common-path system.
Experimental setup and validation of the proposed interferometer's measurement capabilities.

Main Results:

The common-path laser interferometer proved highly feasible in experimental validation.
Achieved a resolution of 0.72 nm over a 0.01 mm range.
Demonstrated a maximum measurable velocity of 0.56 mm/s.

Conclusions:

The common-path design is a viable approach for advanced laser interferometry.
The integrated system shows promising performance, with significant potential for further optimization and improved accuracy.