Femotosecond switching in a dual-core-fiber nonlinear coupler Friberg, Stephen R. ; Weiner, Andrew M. ; Silberberg, Yaron ; Sfez, B. G. ; Smith, P. S. Abstract Publication: Optics Letters Pub Date: October 1988 DOI: 10.1364/OL.13.000904 Bibcode: 1988OptL...13..904F