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We report the study and demonstration of a new laser pulse shaping systemcapable of generating linearly polarized picosecond laser pulses with variabletemporal profiles including symmetric intensity distributions such asparabolic, flattop, elliptical, triangular, as well as non-symmetricdistributions, which are highly desired by various applications. It is foundthat both high transmittance and high stability of the shaped pulse can beachieved simultaneously when crystals are set at a specific phase delay throughfine control of the crystal temperature. Although multi-crystal pulse stackingwith different configurations were reported before particularly for flattoppulse generation, this new configuration leads to new opportunities for manypotential applications over a wide range of laser wavelengths, pulse repetitionrate, time structures and power levels. A practical double-pass temporalshaping configuration that significantly reduces the number of crystals is alsoproposed in this paper as a result of this work.

Generation of picosecond pulses with variable temporal profiles and linear polarization by coherent pulse stacking in a birefringent crystal shaper