Through theoretic analysis and numerical simulations,it has been proved that the diffraction efficiency is not sensitive to central wavelength in combination,but decreases rapidly with the increase of wavelength bandwidth.

The broadband beam space high resolution processing possesses lower resolution threshold and better performance than the element space processing.

The statistical performance of the broadband beam space high resolution algorithm is studied by using the broadband array gain analysis of multiple beam system.

The basic principles and structures of mainstream methods in the incoherent beam combining of fiber lasers which includes polarization beam combination and wavelength beam combination are introduced.