Patent ID: 6762828
Filing Date: 2004-07-13
Classification: G01M

Abstract:
An emitter for emitting electromagnetic pulses, comprising:a generator that generates at least one electromagnetic pulse; at least one optical fiber that transmits said electromagnetic pulse generated by said generator for the purpose of emitting said electromagnetic pulse; and an optical system including an optical cavity: which is disposed in a path of said electromagnetic pulse transmitted by said optical fiber; and which has an input provided with a first partially reflecting mirror and an output provided with a second partially reflecting mirror, wherein: said first partially reflecting mirror is placed between a first fiber length and a second fiber length of the optical fiber, said first fiber length being linked to the generator, said second partially reflecting mirror is placed between the second fiber length and a third fiber length of the optical fiber, said second fiber length being used to link said first and second mirrors together, and the length of said second fiber length and the transmission and reflection ratio of said first and second mirrors are adjusted such that, there is created at the output of said optical cavity, from a single said electromagnetic pulse incident on said optical cavity, a train of emitted electromagnetic pulses which have variable emission solid angles and variable emission areas and are associated with said incident electromagnetic pulse.