1. Spectral Phase Interferometry for Direct Electric-field Reconstruction
SPIDER
Spectral Phase Interferometry for Direct Electric-field Reconstruction
Basic technique:
Chirp generator
Sum
frequency
pulse
sequencer t
Spectro-
meter
The two pulses are “spectrally sheared” by the product with the chirped pulse

2. Spectral Phase Interferometry for Direct Electric-field Reconstruction
SPIDER
Spectral Phase Interferometry for Direct Electric-field Reconstruction
Basic principle: Pulse to be measured shifted in frequency and delayed,
and made to interfere with the original pulse in a spectrometer.
Measure:
Inverse Fourier transform:
2 one-dimensional measurements:
Fourier transform
The spectrum
The sheared spectrum
Extract

3. SPIDER t Ideal for high (kHz) repetition rate Chirp generator Sum
frequency
pulse
sequencer t
Spectro-
meter
Advantage: 2 x 1D therefore fast (kHz) reconstruction
Disadvantages:
1. Raw data not informative
2. Shear and delay not independent
Spatially encoded arrangement for SPIDER
SEA-SPIDER
2D data but ideal for ultrashort pulses

4. SEA-SPIDER Ideal for few cycle pulses
Spectrum and shear along x, delay along y.
Reference: Webb site of Ian Walmsley, thesis of Adam S. Wyatt (2007)

5. SEA-SPIDER
The experimental setup