Title :
Active coherent combination of >200 semiconductor amplifiers using a SPGD algorithm
Author :
Redmond, S.M. ; Kansky, J.E. ; Creedon, K.J. ; Missaggia, L.J. ; Connors, M.K. ; Turner, G.W. ; Fan, T.Y. ; Sanchez-Rubio, A.
Author_Institution :
Lincoln Lab., Massachusetts Inst. of Technol., Lexington, MA, USA
Abstract :
We have demonstrated active coherent beam combination of 218 individually-addressable semiconductor amplifiers with 38.5W CW output. Phase actuation was achieved by adjusting the drive current and controlled using a stochastic-parallel-gradient-descent algorithm.
Keywords :
gradient methods; laser beams; light coherence; semiconductor laser arrays; semiconductor optical amplifiers; stochastic processes; SPGD algorithm; active coherent beam combination; drive current; phase actuation; power 38.5 W; semiconductor amplifiers; stochastic-parallel-gradient-descent algorithm; Convergence; Detectors; Laser beams; Optical amplifiers; Optical fiber amplifiers; Semiconductor laser arrays; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2011 Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1223-4
