Table 1.

Analysis of the effect of windowing on the axial resolution, the highest sidelobe level and the average SNR of a test measurement. The FWHM axial resolution is expressed in DFT bins. The measured spectral array is multiplied in order to obtain the following window. Raw: raw Ti:Sapphire spectral array; Boxcar: 2048-pixels rectangular window; Hann.: 2048-pixels Hanning window; Hamm.: 2048-pixels Hamming window; Hamm. cent. : 1800-pixels Hamming window centered on the raw spectrum.; Designed wind. : designed window based on a modified Hanning window used for most of the experimental measurement presented in this paper.

	Raw	Boxcar	Hann.	Hamm.	Hamm. cent.	Designed wind.
FWHM (DFT bins)	1.78	1.21	2.00	1.81	2.07	2.21
1-sidelobe level (dB)	−18	−13	−31	−41	−41	−31
Test SNR (dB)	64.4	44.3	59.7	50.3	62.4	63.6