Thermal characterization of a cryogenic radiometer and comparison with a laser calorimeter

Livigni, David J.; Cromer, Christopher L.; Scott, Thomas R.; Johnson, Bettye C.; Zhang, Z M

doi:10.1088/0026-1394/35/6/5

Cited by 21 publications

(26 citation statements)

References 10 publications

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“…As such, errors in the absolute splitting ratio of parts-in-a-million, common from heating of the optic, can easily lead to measurement errors on the order of magnitude of the measurand [1]. In contrast, the most accurate laser power measurement technique is the calorimetric measurement principle [2,3]. This is by its nature a very slow process involving total absorption of light, thus precluding monitoring of power in-process.…”

Section: Introductionmentioning

confidence: 99%

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

et al. 2018

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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.

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Section: Introductionmentioning

confidence: 99%

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

et al. 2018

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“…The absolute values of each transfer function are used in Eq. (5). We focus on the uncertainty of the power measurement in this paper.…”

Section: Theoretical Modelmentioning

confidence: 99%

Precise measurement of laser power using an optomechanical system

Agatsuma¹,

Friedrich²,

Ballmer³

et al. 2014

Opt. Express

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This paper shows a novel method to precisely measure the laser power using an optomechanical system. By measuring a mirror displacement caused by the reflection of an amplitude modulated laser beam, the number of photons in the incident continuous-wave laser can be precisely measured. We have demonstrated this principle by means of a prototype experiment uses a suspended 25 mg mirror as an mechanical oscillator coupled with the radiation pressure and a Michelson interferometer as the displacement sensor. A measurement of the laser power with an uncertainty of less than one percent (1 σ ) is achievable. Schnabel, "Observation of squeezed light with 10-dB quantum-noise reduction," Phys. Rev. Lett. 100, 033602

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“…More than one type of detector or standard may be employed as a transfer standard for any given measurement. NIST Standards currently in use for this service include the C-Series Laser Calorimeters [4,6,7,8], and NIST Standard Diode Trap Detectors [9,10,11,12,13,14,15]. Historically, calibration services for laser power and energy meters have been provided by use of calorimeters that were electrically calibrated and directly traceable to SI units through electrical standards.…”

Section: Measurement Standardsmentioning

confidence: 99%

NIST measurement services :

Hadler¹,

Cromer²,

Lehman³

2007

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Congress to "assist industry in the development of technology ... needed to improve product quality, to modernize manufacturing processes, to ensure product reliability ... and to facilitate rapid commercialization ... of products based on new scientific discoveries." NIST, originally founded as the National Bureau of Standards in 1901, works to strengthen U.S. industry's competitiveness; advance science and engineering; and improve public health, safety, and the environment. One of the agency's basic functions is to develop, maintain, and retain custody of the national standards of measurement, and provide the means and methods for comparing standards used in science, engineering, manufacturing, commerce, industry, and education with the standards adopted or recognized by the Federal Government. As an agency of the U.S. Commerce Department's Technology Administration, NIST conducts basic and applied research in the physical sciences and engineering, and develops measurement techniques, test methods, standards, and related services. The Institute does generic and precompetitive work on new and advanced technologies. NIST's research facilities are located at Gaithersburg, MD 20899, and at Boulder, CO 80303. Major technical operating units and their principal activities are listed below. For more information visit the NIST Website at http://www.nist.gov, or contact the Publications and Program Inquiries Desk, 301-975-3058.

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Thermal characterization of a cryogenic radiometer and comparison with a laser calorimeter

Cited by 21 publications

References 10 publications

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

Micromachined Force Scale for Optical Power Measurement by Radiation Pressure Sensing

Precise measurement of laser power using an optomechanical system

NIST measurement services :

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