Heterodyne interferometer with subnanometer accuracy

Author

Haddad, Darine ; Seifert, Frank ; Schlamminger, Stephan ; Chao, Leon S. ; Newell, David B. ; Pratt, Jon R.

Author_Institution

Joint Quantum Inst., Univ. of Maryland, Gaithersburg, MD, USA

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

142

Lastpage

143

Abstract

This paper gives a brief description of the laser interferometer system designed for the next generation watt balance experiment aimed to realize the unit of mass by direct link to the Planck constant at the National Institute of Standards and Technology. The light source is an iodine-stabilized frequency-doubled Nd:YAG laser at λ=532nm. Three heterodyne interferometers with subnanometer non-linearity errors measure the angular and the vertical displacements of the induction coil.

Keywords

angular measurement; balances; coils; displacement measurement; frequency multipliers; laser frequency stability; light interferometers; light sources; neodymium; optical harmonic generation; wattmeters; yttrium compounds; National Institute of Standards and Technology; Nd:YAG; Planck constant; angular measurement; heterodyne interferometer; induction coil; iodine-stabilized frequency-doubled Nd:YAG laser; laser interferometer system; light source; subnanometer nonlinearity error; vertical displacement measurement; watt balance experiment; wavelength 532 nm; Adaptive optics; Frequency modulation; Laser beams; Measurement by laser beam; Optical fibers; Optical interferometry; Planck constant; heterodyne interferometry; non-linearity errors; unit of mass; watt balance;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898299

Filename

6898299