Diffractive-optics-based beam combination of a phase-locked fiber laser array Cheung, Eric C. ; Ho, James G. ; Goodno, Gregory D. ; Rice, Robert R. ; Rothenberg, Josh ; Thielen, Peter ; Weber, Mark ; Wickham, Michael Abstract Publication: Optics Letters Pub Date: February 2008 DOI: 10.1364/OL.33.000354 Bibcode: 2008OptL...33..354C