Broadband light generation by noncollinear parametric downconversion.
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.
Carrasco
Silvia
S
Department of Electrical and Computer Engineering, Boston University, Massachusetts 02215, USA. carrasc@fas.harvard.edu
Nasr
Magued B
MB
Sergienko
Alexander V
AV
Saleh
Bahaa E A
BE
Teich
Malvin C
MC
Torres
Juan P
JP
Torner
Lluis
L