Onsite multikilowatt laser power meter calibration using radiation pressure

Williams, Paul; Hadler, Joshua A.; Simonds, Brian J.; Lehman, John H.

doi:10.1364/ao.56.009596

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…This approach enables a paradigm-changing power measurement that no longer requires the light to be absorbed in order to be measured, it can merely be reflected from a mirror attached to a force sensor. This 'non-exclusive' approach allows not only simultaneous measurement and use of optical power but dramatically increases the upper limit of measurable power [8,9] by minimizing heating that is intrinsic to the absorbing techniques.…”

Section: Introductionmentioning

confidence: 99%

High amplification laser-pressure optic enables ultra-low uncertainty measurements of optical laser power at kilowatt levels

Artusio‐Glimpse

Rogers²,

Williams³

et al. 2021

Metrologia

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We present the first measurements of kilowatt laser power with an uncertainty less than 1%. These represent progress toward the most accurate measurements of laser power above 1 kW at 1070 nm wavelength and establish a more precise link between force metrology and laser power metrology. Radiation pressure, or photon momentum, is a relatively new method of non-destructively measuring laser power. We demonstrate how a multiple reflection optical system amplifies the pressure of a kilowatt class laser incoherently to improve the signal to noise ratio in a radiation pressure-based measurement. With 14 incoherent reflections of the laser, we measure a total uncertainty of 0.26% for an input power of 10 kW and 0.46% for an input power of 1 kW at the 95% confidence level. These measurements of absolute power are traceable to the SI kilogram and mark a state-of-the-art improvement in measurement precision by a factor of four.

show abstract

Section: Introductionmentioning

confidence: 99%

High amplification laser-pressure optic enables ultra-low uncertainty measurements of optical laser power at kilowatt levels

Artusio‐Glimpse

Rogers²,

Williams³

et al. 2021

Metrologia

View full text Add to dashboard Cite

show abstract

“…This approach enables a paradigm-changing power measurement that no longer requires the light to be absorbed in order to be measured, it can merely be reflected from a mirror attached to a force sensor. This "non-exclusive" approach allows not only simultaneous measurement and use of optical power but dramatically increases the upper limit of measurable power [8,9] by minimizing heating that is intrinsic to the absorbing techniques.…”

Section: Introductionmentioning

confidence: 99%

High amplification laser-pressure optic enables ultra-low uncertainty measurements at kilowatts

Artusio-Glimpse,

Rogers,

Williams

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

We present the first measurements of kilowatt laser power with an uncertainty less than 1 %. These represent progress toward the most accurate measurements of laser power above 1 kW at 1070 nm wavelength and establish a more precise link between force metrology and laser power metrology. Radiation pressure, or photon momentum, is a relatively new method of non-destructively measuring laser power. We demonstrate how a multiple reflection optical system amplifies the pressure of a kilowatt class laser incoherently to improve the signal to noise ratio in a radiation pressure-based measurement. With 14 incoherent reflections of the laser, we measure a total uncertainty of 0.26 % for an input power of 10 kW and 0.46 % for an input power of 1 kW at the 95 % confidence level. These measurements of absolute power are traceable to the SI kilogram and mark a state-of-the-art improvement in measurement precision by a factor of four.

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“…This would facilitate desired quality control across platforms and over time for many commercially significant applications. Recently, Williams et al [3] introduced an alternative primary standard laser power meter [4] that measures power from radiation pressure and traces its calibration of the optical watt to the kilogram. Derived from a commercial precision scale, this radiation pressure power meter (RPPM), while allowing use of the beam for processing throughout a measurement, is yet a relatively slow and bulky system filling a cube 30 cm on a side and having a response time of 5 s.…”

Section: Introduction To Radiation Pressure Power Metersmentioning

confidence: 99%