The SSA accessory is designed for use over a broad range of energies and wavelengths. Available in configurations to measure femtosecond or picosecond pulses, this is an accurate and versatile tool compatible with both commercial amplifier systems - Legend Elite, Libra and Hidra - and with home-built amplifier systems.
The SSA splits laser pulses into two beams that are then non-collinearly frequency-doubled in a non-linear crystal. In the femtosecond configuration the relative wavefront tilt produces a spatial time delay in the frequency-doubled signal, which results in an autocorrelation of the temporal intensity profile. In picosecond operation one mirror is replaced with a diffraction grating for additional wavefront tilt. In both operations the autocorrelation signal is detected by a CCD array and is available for display on an oscilloscope or as a measurement by a computer DAC card.
- Measures temporal width of amplified pulses
- Broad pulse width range: from 20fs to 20ps
- Wavelength coverage in femotsecond operation from 680nm to 1100nm
- Indexed internal mirror allows beam to be sampled without disrupting experiments