Patent ID: 7728317
Filing Date: 2010-06-01
Classification: G01J,G01N,G04F,H01S

Abstract:
1. Optical heterodyne sampling device comprising two pulsed laser sources, which may have jitter and adapted to emit respectively a pump beam and a probe beam having respective pulse frequencies F s and F p where F s ≠F p , and a combining element for combining the pump and probe beams which are to be directed onto a sample, and further comprising a signal path, having a photodetection system for the sample reaction signal, and a receiving system for acquiring the detected photo signal which is connected to the signal path, wherein, F s and F p being substantially constant and the acquisition system comprising an acquisition triggering element, the device comprises a synchronisation path, which is connected to said triggering element and has a measuring device for measuring the beat frequency |F s −F p | which is adapted to generate a synchronisation signal consisting of pulses for each time the pump and probe beam pulses coincide.