抄録
Coherent and incoherent beam combination technologies of laser arrays are absolutely imperative for
high power and intensity scaling. Coherent beam combining method classifi ed into two classes; active
(tiled-aperture and fi lled-aperture) and passive phase control and incoherent method is a multi-channel,
spectrally beam-combination technique. This paper reviewed an overview of progress in beam
combination techniques. Recently, the output power of fi ber laser has been signifi cantly increased using
beam combination techniques. Total output power of 8.2 kW is generated by wavelength combination of
four fi ber amplifi ers and near-diffraction-limited 4 kW is obtained by coherent combination of 8 fi ber
lasers.
