2-D Smoothing by SSD

1999:

A two-dimensional smoothing by spectral dispersion (2-D SSD) system was installed on OMEGA and was capable of producing phase-modulated spectra that can be frequency tripled to 1-THz bandwidth in the ultraviolet. This 2-D SSD system incorporated a high-frequency bulk-phase modulator operating at 0.4 GHz to produce an 11 Å of bandwidth in the infrared.

Efficient frequency tripling of this broadband signal requires dual-tripler frequency-conversion crystals that are currently installed on only 13 beams. The high-frequency bulk-phase modulator can also be operated at 3 Å with a higher dispersion grating to produce three SSD color cycles, which significantly improves beam smoothing at lower bandwidths on all 60 OMEGA beams.