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INTERFEROMETER TO MEASURE DISPERSION

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Michelson Interferometer response

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Michelson Interferometer: sample testing sample Without sample: With sample: Ratio:

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Michelson Interferometer: demonstration of a delayed response

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Michelson Interferometer: sample testing Do we need short pulses? Can we test mirrors? We are measuring directly k( ) to all orders (except zero and one)

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White light = random sequence of ultrashort pulses sample Michelson Interferometer: sample testing

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Interferogram without sample, and its Fourier Transform

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Interferogram with 0.5 mm of fused silica in arm 2.

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0306090120 -0.5 0.0 0.5 1.0 Normalized Intensity (a.u.) Relative Delay ( m) 0100200300400 Relative Delay (fs) -0.50.00.51.0 0.0 0.2 0.4 0.6 0.8 1.0 Spectrum (1/fs) Spectral Amplitude (a.u.) -20 -15 -10 -5 0 5 Spectral Phase (rad) Phase Polynomial Fit 1.210.80.6 Wavelength ( m) Interferogram for 2 mm of glass, spectrum and spectral phase.

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020406080100 0 1 Normalized Intensity (a.u.) Relative Delay ( m) 0100200300 Relative Delay (fs) b. 0.0 0.5 1.0 Spectral Phase (rad) -0.4-0.20.00.20.40.6 (1/fs) 0.5 i. 1.0 1.5 ii. 10.90.80.70.6 Wavelength ( m) Interferogram, spectrum and spectral phase. Mirror testing:

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