A　nonlinear　chirp　is　always　introduced　to　an　interference　fringe　in　the　Fourier　domain　optical　coherence　tomography　(FD-OCT),　which　can　be　regarded　as　an　amplitude-modulated　and　frequency-modulated　nonstationary　signal.　It　is　mainly　caused　by　the　non-uniform　wavenumber　sampling　and　the　dispersion　mismatch　between　the　sample　and　the　reference　arms.　It　results　in　the　broadening　of　the　axial　point　spread　function　and　the　degradation　of　the　axial　resolution.　In　this　paper,　the　parameterized　instantaneous　frequency　estimation　method　(PIFEM)　is　applied　to　estimate　the　phase　function　of　the　chirped　interference　fringe　to　achieve　the　linear　resampling　of　the　wavenumber　space　and　the　rebalance　of　the　dispersion　mismatch.　The　proposed　method　is　efficient　and　convenient　that　requires　only　two　interference　fringes　corresponding　to　a　mirror　at　different　depths　in　the　sample　arm　of　the　FD-OCT　system.　In　addition,　it　is　proved　that　the　PIFEM　is　adapted　to　compensate　for　the　depth-independent　dispersion　mismatch　caused　by　the　sample　comprised　of　layered　structures.　The　experiment　results　validate　the　performance　of　the　proposed　method.　©　2024