Fig. 3
From: A broadband DLCZ quantum memory in room-temperature atoms

Experimental results of convolution-based bandwidth measurement. We measure the total transmission windows of cascaded cavities for Stokes (a) and anti-Stokes photons (b). We then detune the write/read light to get another transmission spectra for Stokes (c) and anti-Stokes photons (d). We deduce the frequency spectra of Stokes (e) and anti-Stokes photons (f) by using convolution theorem and Fourier transform