2.18 Spectral Broadening


Spectral Broadening app is used to broaden spectra, or to simply smooth any data by applying a filter function. The filter function can be Gaussian or Lorentzian. Applying a filter function can be particularly useful to broaden spikes in a spectrum.

NOTE: This App requires OriginPro.


  1. Create a new workbook by clicking the New WorkBook button New Workbook button.png on the Standard toolbar. Select menu Data: Connect to File. Import file <Origin Program Folder>\Samples\Spectroscopy\Sample Pulses.dat with default settings.
  2. Highlight col(B) and select menu Plot > Basic 2D : Line to plot the spectrum curve.
  3. Click the Spectral Broadening icon Spectral Broadening icon.png in the Apps Gallery.
  4. In the opened dialog,
    • Spectrum curve is auto-selected from the graph as Input Data.
    • In Filter Settings branch, choose Lorentzian function as filter function in Function drop-down list.
    • Enter 0.1 for Cutoff Frequency.
    • Click the Preview button to display the filtered curve in the right panel.
    Spectral Broadening 01.png
  5. Click the OK button to close dialog and create the filtered data output to the source worksheet.
    Spectral Broadening 02.png