Quiroga Mellado, Juan AntonioServín Guirado, ManuelCuevas de la Rosa, Francisco Javier2023-06-202023-06-202001-12-15[1] M.A. Gdeisat, D.R. Burton, M.J. Lalor. Appl. Opt., 39 (2000), p. 5326. [2] M. Servín, R. Rodríguez-Vera J. Mod. Opt., 40 (1993), p. 2087. [3] M. Takeda, H. Ina, S. Kobayashi J. Opt. Soc. Am., 72 (1982), p. 156. [4] K.H. Womack Opt. Eng., 23 (1984), p. 391. [5] J. Kozlowwski, O. Serra Opt. Eng., 36 (1996), p. 2025. [6] J. Villa, J.A. Quiroga, M. Servín Appl. Opt., 39 (2000), p. 502. [7] D.C. Ghiglia, L.A. Romero Opt. Soc. Am. A, 11 (1994), p. 107. [8] M. Servín, F.J. Cuevas, D. Malacara, J.L. Marroquín Appl. Opt., 38 (1999), p. 1934.0030-401810.1016/S0030-4018(01)01611-Xhttps://hdl.handle.net/20.500.14352/58782© 2001 Elsevier Science B.V. We would like to acknowledge the Mexican Goverment support through CONACYT for the development of this work.First- and second-order recursive Digital Phase Locked Loops (DPLLs) have been used recently in fringe data processing because it is the fastest way to obtain the unwrapped phase of a carrier frequency fringe pattern due to its minimal computational overhead. Nevertheless these simple DPLLs cannot cope with fringes having high noise and very wide band phase modulation. In this work we present a highly improved DPLL. The system presented is a nonrecursive DPLL which is far more robust than previously presented recursive DPLL. The advantage of this newer technique with respect to recursive DPLL is its higher gain in the signal to noise ratio on the detected phase and higher stability. Unfortunately this is obtained at a higher computational cost.engjournal articlehttp://dx.doi.org/10.1016/S0030-4018(01)01611-Xhttp://www.sciencedirect.com/open access535Tracking TechniqueÓptica (Física)2209.19 Óptica Física