Low-cost laser detection system with a 360-deg horizontal field of view

A low-cost laser detection system based on coherence has been developed and is able to detect weak, continuous sources even against bright background light. The composed of a Mach–Zehnder interferometer with one arm modified piezo-mounted mirror modulate the path length. We introduce methods determine wavelength extend horizontal field view detector. To widen view, cone added while additional use camera allows direction incoming beam be studied. from three different lasers estimated modulation amplitude piezo mirror. preliminary results demonstrate that 360-deg can achieved determined an angular precision ±5 deg. Moreover, ±10 nm. trades sensitivity for larger resultant equal 70 nW (or 1 μW · cm − 2) at 635