Phase Estimation in Optical Interferometry

270 ◾ Abhijit Patil, Rajesh Langoju, and Pramod Rastogi

Because the methods mentioned in Table7.1 are sensitive to the nonlinear

response of the PZT, a nonlinML method appeared to be a suitable can-

didate for the estimation of the phase information. In addition, under the

hypothesis that the response of the PZT is monotonically nonlinear, the

measurement of phase can be performed without the need of any calibra-

tion of the device. Although in this chapter we did not discuss statisti-

cal analysis of these methods, ample literature [27, 34] could be found to

understand the ecacy of the signal-processing methods in phase-shi-

ing interferomet ...