Use of radiation pressure for measurement of high-power laser emission

Williams, Paul; Hadler, Joshua A.; Lee, Robert; Maring, Frank C.; Lehman, John H.

doi:10.1364/ol.38.004248

Cited by 45 publications

(25 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The accuracy of the fitting curve can be easily checked instantaneously by comparing the values of height h0 obtained from ratios -a2/(2a3) and -2a1/a2, which should agree. From Table 1 we see that for accurate determination of fitting polynomial coefficients it is desirable that the measurement interval covers a range where the second and third derivatives of the function (11) are pronounced. Because this algorithm depends on coefficients of high order polynomial derivatives, it is vulnerable to the presence of noise in the data.…”

Section: Static Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

et al. 2018

View full text Add to dashboard Cite

We introduce a micromachined force scale for laser power measurement by means of radiation pressure sensing. With this technique, the measured laser light is not absorbed and can be utilized while being measured. We employ silicon micromachining technology to construct a miniature force scale, opening the potential to its use for fast in-line laser process monitoring. Here we describe the mechanical sensing principle and conversion to an electrical signal. We further outline an electrostatic force substitution process for nulling of the radiation pressure force on the sensor mirror. Finally, we look at the performance of a proof-of-concept device in open-loop operation (without the nulling electrostatic force) subjected to a modulated laser at 250 W and find its response time is less than 20 ms with noise floor dominated by electronics at 2.5 W/√Hz.

show abstract

Section: Static Characterizationmentioning

confidence: 99%

“…The portable laser power meter employing a commercially available force scale for radiation pressure measurements was first introduced by P. Williams, et al [11]. This power meter brought about a considerable shift in how laser power measurement is approached.…”

Section: Introductionmentioning

confidence: 99%

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

et al. 2018

View full text Add to dashboard Cite

show abstract

“…This results in traceability through the kilogram, the meter, and the second [20]. Heat balance calorimeter [17] 1.6 % Primary 1 kW -50 kW** [18,19] 1070 Radiation pressure power meter (RPPM)…”

Section: Introductionmentioning

confidence: 99%

Meta-study of laser power calibrations ranging 20 orders of magnitude with traceability to the kilogram

et al. 2019

View full text Add to dashboard Cite

Laser power metrology at the National Institute of Standards and Technology (NIST) ranges 20 orders of magnitude from photon-counting (10 3 photons/s) to 100 kW (10 23 photons/s at a wavelength of 1070 nm). As a part of routine practices, we perform internal (unpublished) comparisons between our various power meters to verify correct operation. Here we use the results of these intercomparisons to demonstrate an unbroken chain tracing each power meter's calibration factor to the NIST cryogenic radiometer (our lowest uncertainty standard, whose SI traceability is established through the volt and ohm units). This yields the expected result that all the NIST primary standard measurement techniques agree with each other to within their measurement uncertainty. Then, these intercomparison results are re-mapped to describe the agreement of the various techniques with our radiation-pressure-based power measurement approach, whose SI traceability is established through the kilogram. Again, agreement is demonstrated to within the measurement uncertainty. This agreement is reassuring because the measurements are compared with two entirely different traceability paths and show expected agreement in each case. The ramifications of this agreement as well as potential means to improve on it are discussed.We demonstrate SI measurement traceability of our single-photon power measurement through the kilogram with less than 3 % relative expanded uncertainty (obtained for a coverage factor k=2 defining an interval having a level of confidence of approximately 95 %). I. (cesium hyperfine splitting frequency), and c (the speed of light in vacuum). *At the time of publication, the NextGenC is not yet fully validated as a primary standard but is included for completeness.

show abstract

“…The connection between force and power can be used to build metrological tools that measure optical power from a known force, or that measure force from a known optical power. In the kilowatt range, radiation pressure has been measured with percent level uncertainties using a calibrated force transducer [2,3]. In the milliwatt range, piconewton forces have been measured with percent level uncertainty using a calibrated optical power [4,5].…”

Section: Introductionmentioning

confidence: 99%

Direct measurement of radiation pressure and circulating power inside a passive optical cavity

Wagner¹,

Guzmán²,

Chijioke³

et al. 2018

Opt. Express

View full text Add to dashboard Cite

A mechanical force sensor coupled to two optical cavities is developed as a metrological tool. This system is used to generate a calibrated circulating optical power and to create a transfer standard for externally coupled optical power. The variability of the sensor as a transfer standard for optical power is less than 2%. The uncertainty in using the sensor to measure the circulating power inside the cavity is less than 3%. The force measured from the mechanical response of the sensor is compared to the force predicted from characterizing the optical spectrum of the cavity. These two forces are approximately 20% different. Potential sources for this disagreement are analyzed and discussed. The sensor is compact, portable, and can operate in ambient and vacuum environments. This device provides a pathway to novel nanonewton scale force and milliwatt scale laser power calibrations, enables direct measurement of the circulating power inside an optical cavity, and enhances the sensitivity of radiation pressure-based optical power transfer standards.

show abstract

Use of radiation pressure for measurement of high-power laser emission

Cited by 45 publications

References 14 publications

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

Meta-study of laser power calibrations ranging 20 orders of magnitude with traceability to the kilogram

Direct measurement of radiation pressure and circulating power inside a passive optical cavity

Contact Info

Product

Resources

About