FWHM pulse widths for the pulsars in our dataset. The black stars represent the pulse width at each frequency, with the corresponding error in measurement. The red lines in each panel are the power-law fits on the FWHM values. The FWHM values that lie below the power-law fits correspond to the absorption features, which can be seen most prominently in PSRs J1300+1240 and J1645-0317