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INTERFEROMETER TO MEASURE DISPERSION Michelson Interferometer response.

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Presentation on theme: "INTERFEROMETER TO MEASURE DISPERSION Michelson Interferometer response."— Presentation transcript:

1

2 INTERFEROMETER TO MEASURE DISPERSION

3 Michelson Interferometer response

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

5 Michelson Interferometer: demonstration of a delayed response

6 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)

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

8 Interferogram without sample, and its Fourier Transform

9 Interferogram with 0.5 mm of fused silica in arm 2.

10 Normalized Intensity (a.u.) Relative Delay (  m) Relative Delay (fs) Spectrum  (1/fs) Spectral Amplitude (a.u.) Spectral Phase (rad) Phase Polynomial Fit Wavelength (  m) Interferogram for 2 mm of glass, spectrum and spectral phase.

11 Normalized Intensity (a.u.) Relative Delay (  m) Relative Delay (fs) b Spectral Phase (rad)  (1/fs) 0.5 i ii Wavelength (  m) Interferogram, spectrum and spectral phase. Mirror testing:


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