Strickland and Mourou jointly won half of the prize for developing a new amplification procedure for high-intensity laser pulses called chirped-pulse amplification. The two scientists devised a way to amplify short laser pulses without damaging the material used to do so or resorting to larger, more expensive lasers and equipment.
The other half of the prize recognized Ashkin for using lasers to develop optical tweezers for moving microscopic objects like molecules.
Previous female winners in physics include Maria Goeppert Mayer (1963) and Marie Curie (1903).