Patent ID: 6100965
Filing Date: 2000-08-08
Classification: G01S

Abstract:
Laser speed measurement and range finding device with coherent detection comprising:a solid monolithic microlaser (16, 10, 18) with continuous emission, comprising an active laser medium (10) and a microlaser cavity (16,18),means (20, 22, 24) of modulating an optical frequency of a beam emitted by the microlaser,means (28) of outputting a signal depending on:firstly, the Doppler frequency ##EQU25## where .lambda. is the microlaser emission wave length and v is the speed of a target (2) to be detected,secondly, a modulation frequency F.tau. caused by interference in the cavity, of the frequency modulated laser oscillation and the signal originating from a target (2) located at a certain distance Z.