  A novel design of a grating-based optical pulse compressor is proposed. The
proposed compressor provides a large group delay dispersion while keeping the
compressor linear size small. The design of the proposed compressor is based on
a traditional Treacy compressor with a straightforward modification of
inserting two lenses between the compressor's gratings. This simple alternation
aims to substantially increase group delay dispersion of the compressor or
alternatively to decrease the compressor size while maintaining its group delay
dispersion. A theoretical description of the enhanced compressor has been
developed in the paraxial approximation. A detailed numerical model has been
built to calculate the compressor parameters more accurately. These theoretical
studies have revealed that the enhanced optical compressor provides a
significant increase in the group delay dispersion compared to a standard
Treacy compressor.
