Université de Neuchâtel

Miniaturized time-scanning Fourier transform spectrometer based on silicon technology

Manzardo, Omar ; Marxer, Cornel R. ; de Rooij, Nicolaas F. ; Herzig, Hans-Peter

In: Optics Letters, 1999, vol. 24, no. 23, p. 1705-1707

We present a miniaturized Fourier transform spectrometer (FTS) based on optical microelectromechanical system technology. The FTS is a Michelson interferometer with one scanning mirror. A new type of electrostatic comb drive actuator moves the mirror. We have measured a nonlinearity of the driving system of ±0.5 μm for a displacement of 38.5 μm . A method is presented to correct...

Université de Neuchâtel

Review of iterative Fourier-transform algorithms for beam shaping applications

Ripoll, Olivier ; Kettunen, Ville ; Herzig, Hans-Peter

In: Optical Engineering, 2004, vol. 43, no. 11, p. 2549

We present a comparison of some of the most used iterative Fourier transform algorithms (IFTA) for the design of continuous and multilevel diffractive optical elements (DOE). Our aim is to provide optical engineers with advice for choosing the most suited algorithm with respect to the task. We tackle mainly the beam-shaping and the beam-splitting problems, where the desired light distributions...