Mode-locked Kerr frequency combs Matsko, A. B. ; Savchenkov, A. A. ; Liang, W. ; Ilchenko, V. S. ; Seidel, D. ; Maleki, L. Abstract Publication: Optics Letters Pub Date: August 2011 DOI: 10.1364/OL.36.002845 Bibcode: 2011OptL...36.2845M