Distinguishing non-resonant four-wave-mixing noise in coherent stokes and anti-stokes Raman scattering
First Claim
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1. A method of examining a sample, comprising:
- exposing of the sample to a pump pulse of electromagnetic radiation for a first period of time, defined as the pump pulse duration,exposing of the sample to a stimulant pulse of electromagnetic radiation for a second period of time that is shorter than, or equal in duration to, the pump pulse duration, thereby producing a signal pulse of electromagnetic radiation for a third period of time which extends beyond the stimulant pulse duration,interfering the signal pulse with a reference pulse of electromagnetic radiation, anddemodulating a portion of the signal pulse that is not conterminous with the stimulant pulse duration.
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Abstract
A method of examining a sample comprises exposing the sample to a pump pulse of electromagnetic radiation for a first period of time, exposing the sample to a stimulant pulse of electromagnetic radiation for a second period of time which overlaps in time with at least a portion of the first exposing, to produce a signal pulse of electromagnetic radiation for a third period of time, and interfering the signal pulse with a reference pulse of electromagnetic radiation, to determine which portions of the signal pulse were produced during the exposing of the sample to the stimulant pulse. The first and third periods of time are each greater than the second period of time.
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12 Claims
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1. A method of examining a sample, comprising:
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exposing of the sample to a pump pulse of electromagnetic radiation for a first period of time, defined as the pump pulse duration, exposing of the sample to a stimulant pulse of electromagnetic radiation for a second period of time that is shorter than, or equal in duration to, the pump pulse duration, thereby producing a signal pulse of electromagnetic radiation for a third period of time which extends beyond the stimulant pulse duration, interfering the signal pulse with a reference pulse of electromagnetic radiation, and demodulating a portion of the signal pulse that is not conterminous with the stimulant pulse duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification