Fourier transform spectrometer with a frequency comb light source
First Claim
Patent Images
1. A Fourier transform spectrometer for analyzing a sample comprising:
- a coherent light source comprising a frequency comb generator having a defined frequency repetition rate, wherein the frequency comb generator is split into two counter propagating beams, one for red-shift and one for blue;
a two-input two-output Fourier transform interferometer, based on amplitude or wavefront division, comprises a fixed arm and a moving arm and is adapted to separate the coherent light source into two parts, each part following one arm, in order to generate interferences between the two parts and analyzing said two counter propagating beams;
a differential detection means adapted to obtain the difference between the two resulting interferograms measured at the two outputs of the Fourier transform interferometer; and
wherein the sample is positioned on the light path between the coherent light source and the Fourier transform interferometer.
1 Assignment
0 Petitions
Accused Products
Abstract
An embodiment relates to a Fourier transform spectrometer comprising: a coherent light source; an interferometer adapted to separate the coherent light source into two or more parts in order to generate through frequency or phase-induced effects, interferences between the two or more parts; detection means adapted to detect the interferences, wherein the coherent light source comprises a frequency comb generator having a frequency repetition rate, and the detection means are adapted to detect the beating of pairs of frequencies of the frequency comb separated by the frequency repetition rate or a multiple of the frequency repetition rate.
-
Citations
5 Claims
-
1. A Fourier transform spectrometer for analyzing a sample comprising:
-
a coherent light source comprising a frequency comb generator having a defined frequency repetition rate, wherein the frequency comb generator is split into two counter propagating beams, one for red-shift and one for blue; a two-input two-output Fourier transform interferometer, based on amplitude or wavefront division, comprises a fixed arm and a moving arm and is adapted to separate the coherent light source into two parts, each part following one arm, in order to generate interferences between the two parts and analyzing said two counter propagating beams; a differential detection means adapted to obtain the difference between the two resulting interferograms measured at the two outputs of the Fourier transform interferometer; and wherein the sample is positioned on the light path between the coherent light source and the Fourier transform interferometer. - View Dependent Claims (2, 3, 4, 5)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeCentre National De La Recherche Scientifique, Universite Paris - Sud
-
Original AssigneeCentre National De La Recherche Scientifique, Universite Paris - Sud
-
InventorsGuelachvili, Guy, Mandon, Julien, Picqu, Nathalie
-
Primary Examiner(s)HANSEN, JONATHAN M
-
Application NumberUS13/055,898Publication NumberTime in Patent Office1,982 DaysField of Search356/451, 356/483US Class Current356/483CPC Class CodesG01J 3/453 by correlation of the ampli...
