title: Measurement of coherence area in parametric downconversion luminescence.
abstract: The coherence area is measured in a simple Young's experiment using parametric downconversion light produced in a nonlinear crystal (LiIO(3)) pumped by a continuous argon-ion laser. The normalized mutual intensity or degree of coherence is obtained from the intensity distribution interference patterns and compared with a standard theory in which the light source behaves as a surface with infinitesimal uncorrelated emitters.
authors.forename: P H
authors.initials: PH
authors.lastname: Ribeiro
authors.forename: C H
authors.initials: CH
authors.lastname: Monken
authors.forename: G A
authors.initials: GA
authors.lastname: Barbosa