Tunable laser diode allows reconstruction of surface profile by removing phase ambiguities through the generation of synthetic wavelength. The scheme works on the assumption that the initial synthetic wavelength provides an unambiguous phase difference. For a tilted surface, obtaining an unambiguous phase across the entire surface can be challenging due to the finite value of the initial synthetic wavelength, demanding unwrapping of the phase across the sample. We explore the possibility of using the wrapped phase of the initial synthetic wavelength itself as the initial estimate for obtaining the surface profile and subsequently improving it using recursive calculation through a gradual reduction in the synthetic wavelength. Lensless Fourier transform holograms for a tilted object are recorded by tuning the wavelength. Our results indicate that the reconstructed surface profile gets accurate when the variation of synthetic wavelength is carried out with finer values.