Interferometric system for complex image extraction

Details Interferometric system for complex image extraction Interferometric system for complex image extraction

G - Physics

01

N

G01N 21/45 (2006.01) G01N 21/59 (2006.01)

Patent

CA 2594311

The invention provides an interferometric system and method for quadrature detection of optical characteristics of a sample. The system includes a Mach-Zehnder interferometer providing a variable optical delay between light collected from the sample and reference light. The Mach--Zehnder interferometer has an output M x N coupler with N>=3 output ports. Two differential detectors, each having two input ports coupled to a different two of the N output ports of the M x N coupler, produce first and second electrical signals having an interferometric phase shift. A processor is provided for computing real and imaginary parts of a complex refractive index of the sample from the first and second electrical signals by using complex deconvolution.

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