title: Broadband light generation by noncollinear parametric downconversion.
abstract: Broadband light generation is demonstrated by noncollinear spontaneous parametric downconversion with a cw pump laser. By use of a suitable noncollinear phase-matching geometry and a tightly focused pump beam, downconverted signals that feature a bell-shaped spectral distribution with a bandwidth approaching 200 nm are obtained. As an application of the generated broadband light, submicrometer axial resolution in an optical coherence tomography scheme is demonstrated; a free-space resolution down to 0.8 microm was achieved.
authors.affiliation: Department of Electrical and Computer Engineering, Boston University, Massachusetts 02215, USA. carrasc@fas.harvard.edu
authors.forename: Silvia
authors.initials: S
authors.lastname: Carrasco
authors.forename: Magued B
authors.initials: MB
authors.lastname: Nasr
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Sergienko
authors.forename: Bahaa E A
authors.initials: BE
authors.lastname: Saleh
authors.forename: Malvin C
authors.initials: MC
authors.lastname: Teich
authors.forename: Juan P
authors.initials: JP
authors.lastname: Torres
authors.forename: Lluis
authors.initials: L
authors.lastname: Torner