Formulas for Fabry-Perot velocimeter performance using both stripe and multifrequency techniques.

New stripe and multifrequency techniques for Fabry-Perot velocimetry are incorporated into an analytical model for the entire system. Properties of striped interferometers (FP's) are derived. An understanding of energy flow in both striped and unstriped FP's is presented.

Dynamic fringe broadening in multiple line laser Doppler velocimetry.

The recently reported multiple line laser Doppler velocimetry technique involves a compromise between laser power and fringe broadening. The present work analyzes the broadening as a function of both the target velocity and the separations of the Fabry-Perot etalons, which in this work do not have to be the same. It is shown that the overlap finesse broadening, which is defined as the ratio of the frequency separation between fringes to the overlap broadening, depends on the number of free spectral ranges that have occurred due to the velocity of the reflecting target.

Efficiency enhancements for Fabry-Perots used in velocimetry.

This Letter discusses the premise that using a Fabry- Perot for velocity measurements wastes most of the energy arriving at the input mirror and suggests a way to use more of the energy.