title: Observation of a 100-MHz frequency variation across the output of a frequency-doubled injection-seeded unstable-resonator Q-switched Nd:YAG laser.
abstract: We report high-resolution measurements of the spatial variation of the optical frequency of an injection-seeded unstable-resonator Q-switched Nd:YAG laser. Images of the second harmonic taken through a molecular-iodine notch filter show frequency variations of as much as 100 MHz (second harmonic) between the center and the edge of the beam.
authors.forename: J N
authors.initials: JN
authors.lastname: Forkey
authors.forename: W R
authors.initials: WR
authors.lastname: Lempert
authors.forename: R B
authors.initials: RB
authors.lastname: Miles