We present the measurement principle and the optical design of a Quad Mach Zehnder (QMZ) interferometer as HSRL technique. allowing simultaneous measurements of particle backscattering and wind velocity. Key features of this concept is to operate with a multimodal laser and do not require any frequency stabilization. These features are relevant especially for space applications for wh... https://www.lightemupsequences.com/sale-now-Peperomia-Double-Duty-super-offer/