Abstract
Programmable spatial light phase modulators (SLPM) arc a key component of the femtosecond pulse shaper.1 Existing linear SLPMs, fall into two categories; deformable continuous thin membrane mirrors, 2 and pixilated arrays of liquid crystal phase shifters.3 Deformation of a continuous membrane produces smooth spectral phase variations and a corresponding, high quality optical pulse but membranes arc not capable of producing localized rapid spectral phase changes. Pixilated arrays of phase modulators can produce rapid phase changes between pixels. However, the phase shift for each pixel is constant and the resulting discrete approximation to smooth phase variations results in undesired energy in the pulse wings.
© 2001 Optical Society of America
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