PRECISION WAVELENGTH METROLOGY WITH A FOURIER TRANSFORM SPECTROMETER

• Abstract:

  We have investigated the intrinsic accuracy of the optical frequency scale in spectra acquired by a Fourier Transform Spectrometer (FTS). The uncalibrated accuracy of the FTS optical frequency axis is about 1 part in 10⁵. This uncertainty can be reduced by at least two orders of magnitude using a multiplicative calibration correction derived from a single wavelength standard line. The work reported here describes a new approach to accurate calibration of the wavenumber scale for a UV-visible FTS, which we have used to measure accurate wavenumbers and Ar pressure shifts for the prominent lines of ¹⁹⁸Hg.
• Keywords:

  Fourier Transform Spectrometer, wavenumber calibraton, Hg, pressure shift
• Download:

  PWC-2003-TC2-016.pdf
• DOI:

  _unreg_wc-2003.TC2-016

Event details:

• IMEKO TC:
• Event name:

  XVII IMEKO World Congress
• Title:

  Metrology in the 3rd Millennium

• Place:

  Dubrovnik, CROATIA
• Time:

  22 June 2003 - 28 June 2003