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. 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.

11. 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: