Centre National De La Recherche Scientifique

Thales

UniversitÉ De Paris

Université De Franche Comte

Centre National De La Recherche Scientifique-cnrs

Jean-Charles Beugnot

Daniel Dolfi

Vincent Laude

Sylvain Combrie

Loic Morvan

Remy Braive

Jacques Chretien

Adrien Godet

Isabelle Robert

Sarah Benchabane

A process for delaying a useful optical signal (P1) having a wavelength value λ between 0.2 μm and 3 μm, with respect to a reference optical signal (P2) having the same wavelength value λ. The process includes having the useful optical signal propagate along a tapered fiber portion. A length of the tapered fiber portion can be varied using stretching means that are light, less cumbersome and less expensive compared to those necessary for a standard optical fiber. In addition, the delay value which is effective for the useful optical signal can be varied over a wide range. Such process can be useful for interferometry measurements in particular.

Process for delaying an optical signal

This oscillator comprises: a source generating an incident optical wave at a pulsation frequency &#x3c9;; an optomechanical resonator, having optical resonances at the pulsation frequency &#x3c9; and mechanical resonances at a frequency fand generating, from the incident optical wave, emergent optical waves at the pulsation frequencies &#x3c9; and &#x3c9;&#x2212;2&#x3c0;f, and an acoustic wave at frequency f; and, a photodiode delivering a useful signal at frequency ffrom the emergent waves. This oscillator further comprises: an acoustic propagation means for propagating the acoustic wave over a distance in order to produce a delayed acoustic wave; a means for converting the delayed acoustic wave into a delay signal at the frequency f; and, a control loop, processing the delay signal in order to obtain a control signal applied to the source.

Radio frequency oscillator

Growing community of inventors

Paris, France

Jean-Charles Beugnot