Patent ID: 9052239
Filing Date: 2015-06-09
Classification: G01J

Abstract:
1. A multi-dimensional spectrometer comprising: a first spectral modulator producing at least one first modulated light pulse passing along a first optical path, the first modulated light pulse formed from an interference of two substantially identical pulses providing modulation by interference between the identical pulses; a second spectral modulator producing at least one second modulated light pulse passing along a second optical path, the second modulated light pulse formed from an interference of two substantially identical pulses providing modulation by interference between the identical pulses; a sample volume positioned at an intersection of the first and second light pulses; a detector positioned to measure an intensity of at least one of the first and second light pulses after passage through the sample volume; and a controller communicating with the first and second spectral modulator and operating to collect intensity information from the detector and modulation information independent of the detector during a changing modulation of the first and second light pulses so as to permit generation of a two dimensional spectrum of a sample in the sample volume solely from the intensity and modulation information; wherein the first and second spectral modulators are Michelson interferometers receiving a single input light pulse and dividing it between a first and second light path of different lengths to produce two substantially identical pulses shifted with respect to each other in time that combine to provide the first and second modulated light pulses, wherein the interferometers are controlled by the controller to change a difference between the different lengths of the first and second light paths during generation of the two-dimensional spectrum.