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Gaussian laser-beam-diameter measurement using sinusoidal and triangular rulings.

M A Karim, A A Awwal, A M Nasiruddin

|September 10, 2009

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Triangular and sinusoidal rulings offer reliable Gaussian laser beam diameter measurements, outperforming Ronchi rulings for extremely small beam sizes. These methods effectively consider ruling periodicity and contrast.

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Area of Science:

Optics and Photonics
Laser Metrology

Background:

Accurate measurement of Gaussian laser beam diameter is critical for various applications.
Existing methods like Ronchi rulings have limitations, especially for small beam sizes.

Purpose of the Study:

To analyze the effectiveness of triangular and sinusoidal rulings for Gaussian laser beam diameter measurement.
To compare the reliability of these rulings against Ronchi rulings.

Main Methods:

Analysis of Gaussian laser beam diameter measurements.
Evaluation of ruling periodicity and contrast effects.
Comparative study with Ronchi rulings.

Main Results:

Triangular and sinusoidal rulings demonstrate reliability in Gaussian beam diameter measurements.
The influence of periodicity and contrast on measurement accuracy was investigated.
These rulings are more reliable than Ronchi rulings for extremely small beam diameters.

Conclusions:

Triangular and sinusoidal rulings provide a robust method for measuring small Gaussian laser beam diameters.
Ruling characteristics significantly impact measurement accuracy.
These rulings represent an improvement over traditional methods for micro-scale beam analysis.