An optical system for efficiently directing a large bandwidth light (e.g., a femtosecond laser pulse) onto a nonlinear optical medium includes a plurality of optical elements for directing an input light pulse onto a nonlinear optical medium arranged such that the angle .theta..sub.in which the light pulse directed onto the nonlinear optical medium is substantially independent of a position x of the light beam entering the optical system. The optical system is also constructed such that the group velocity dispersion of light pulses passing through the system can be tuned to a desired value including negative group velocity dispersion.
STATEMENT OF GOVERNMENT RIGHTS
This invention was made with Government support under Contract no. DE-AC04-94AL8500 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in the invention.