Nbs Laser Power And Energy Measurements

Scott, Thomas R.

doi:10.1117/12.944232

Cited by 12 publications

(6 citation statements)

References 1 publication

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“…The uncertainty associated with the absorbtivity of the standard calorimeters used in this service is discussed elsewhere by T. Scott. [15] 6.1.2 Electronics (Type B)…”

Section: Measurement Standard Uncertaintiesmentioning

confidence: 99%

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High power laser calibrations at NIST

Li¹,

Hadler²,

Cromer³

et al. 2008

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This document describes the calibration service for the responsivity of laser power meters and detectors used with high power continuous wave lasers at laser wavelengths of 1 .06 and 10.6 ^im. An overview of the calibration procedures, measurement system, and uncertainty analysis is presented. A sample calibration report is included in this document that is similar to that which is provided to the customer. The calibration report contains an absolute calibration factor and a summary of the uncertainty assessment for the device under test.

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“…The uncertainty associated with the absorbtivity of the standard calorimeters used in this service is discussed elsewhere by T. Scott. [15] 6.1.2 Electronics (Type B)…”

Section: Measurement Standard Uncertaintiesmentioning

confidence: 99%

“…The uncertainty for the inequivalence of the standard calorimeters used in this service is covered by T. Scott. [15] 6.1.5 Electrical Calibration (Type A)…”

Section: Iheater Leads (Type B)mentioning

confidence: 99%

High power laser calibrations at NIST

Li¹,

Hadler²,

Cromer³

et al. 2008

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“…The absolute calibration [ 7 ] of the test meter at the desired laser wavelength and power level P c [used in Eq. (3) ] can be done prior to or after the nonlinearity measurement, since they are two independent measurements.…”

Section: Measurement Procedures and Analysismentioning

confidence: 99%

Nonlinearity measurements of high-power laser detectors at NIST

Li¹,

Scott²,

Shao³

et al. 2004

J. Res. Natl. Inst. Stand. Technol.

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We briefly explain the fundamentals of detector nonlinearity applicable to both electrical and optical nonlinearity measurements. We specifically discuss the attenuation method for optical nonlinearity measurement that the NIST system is based upon, and we review the possible sources of nonlinearity inherent to thermal detectors used with high-power lasers. We also describe, in detail, the NIST nonlinearity measurement system, in which detector responsivity can be measured at wavelengths of 1.06 µm and 10.6 µm, over a power range from 1 W to 1000 W. We present the data processing method used and show measurement results depicting both positive and negative nonlinear behavior. The expanded uncertainty of a typical NIST high-power laser detector calibration including nonlinearity characterization is about 1.3 %.

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“…Since the K-series instruments measure total energy, average laser power is found by dividing the total energy by the exposure time interval. This calorimeter has been in constant use as a primary standard over the past twenty-five years and has shown little or no change in response characteristics during this time [2]. The laboratory standard used in these comparison measurements, PM150-50C, is a commercial, water-cooled, thermopile-based probe with excellent repeatability and spatial uniformity.…”

Section: Nist Measurement Systemmentioning

confidence: 99%

Power measurement standards for high-power lasers: comparison between the NIST and the PTB

Li¹,

Scott²,

Cromer³

et al. 2000

Metrologia

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We report the results of the first laser high-power measurement comparison between the Physikalisch-Technische Bundesanstalt (PTB, Germany), and the National Institute of Standards and Technology (NIST, USA). Laser power transfer standards were calibrated at both national standards laboratories between 82 W and 127 W at 1.06 µm and between 85 W and 554 W at 10.6 µm. Relative agreement between the standards of the two laboratories was demonstrated to lie between 5 10 -3 and 7 10 -3 , which is well within the combined uncertainties.

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Nbs Laser Power And Energy Measurements

Cited by 12 publications

References 1 publication

High power laser calibrations at NIST

High power laser calibrations at NIST

Nonlinearity measurements of high-power laser detectors at NIST

Power measurement standards for high-power lasers: comparison between the NIST and the PTB

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