What is Calibration Uncertainity of a Laser Power Meter?

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- GoPhotonics

Dec 6, 2023

The laser power meter is an optical device used to measure the output power of a laser, making them invaluable tools for both testing purposes and laser system applications. The meter is specifically designed to analyze lasers within defined ranges of wavelengths or intensities, ensuring precise measurements and enabling comprehensive evaluation of laser performance.

The calibration process of a laser power meter refers to verifying its accuracy by comparing the measured parameter to a reference standard maintained by a national laboratory or international standards body. The primary parameter used to specify calibration capability is uncertainty. Uncertainty is the measure of the deviation of the measured value from the reference value. 

Calibration uncertainty defines the acceptable range for the uncertainty in the measured parameter of an instrument that can be considered accurate. This uncertainty considers the combined uncertainties from all stages of the calibration process.

The calibration uncertainty for laser power measurement instruments is commonly in the range of 1% - 5%. The reading taken by an instrument that falls within this range can be considered accurate.