Heterodyne optical remote sensing system

Abstract

The invention relates to an optical remote sensing system (2) comprising: a laser source (10) for generating a laser beam, a portion of which forms a local oscillator (18); an emission stage (12) configured to shape the laser beam for propagation in a medium to be probed (8); a collection stage (20) configured to collect light scattered by the medium to be probed (8); a plurality of photodetectors (28); and for each photodetector (28), an optical fiber (30) for carrying a portion of the light collected by the collection stage (20) to said photodetector (28), to generate, on the photodetector (28), an optical interference signal with a fraction of the local oscillator (18), the photodetector (28) being the conjugate, through each optical fiber (30) and the collection stage (20), of a respective point in the medium to be probed (8). Figure 1

Claims

5. System (2) according to any one of claims 1 to 4, wherein, for at least one optical fiber (30), an optical axis (A4) corresponding to the level of the respective input (34) is parallel to an optical axis (A2) of the optical collection stage (20).

6. System (2) according to any one of claims 1 to 5, wherein, for at least one optical fiber (30), an optical axis (A4) corresponding to the level of the respective inlet (34) passes through an optical center of the optical collection stage (20).

Images