In diode pumped solid state lasers,the matching degree between the output wavelength of the pump source and the absorption spectrum of the laser crystal is caused by the thermal drift characteristic,which reduces the pumping efficiency and affects the laser output energy.In order to avoid this influence,the project team adopted the design idea of broadening the coverage range of emission spectrum,and carried out the wide spectrum diode array.This paper completed the modeling of 6 chips planar array,the design and simulation of array center wavelength,and the design and simulation of dual wavelength superposition based on Gaussian spectral model.At the same time,the chip with four wavelength intervals of 2.0 nm,2.4 nm,2.8 nm and 3.2 nm was verified experimentally.The results show that when the wavelength interval is 2.0 nm and 2.4 nm,the spectra shows one single peak after superposition.When the wavelength spacing is 2.8 nm and 3.2 nm,the spectra after superposition shows peak valley distribution,and the corresponding peak valley ratio test values are 1.03 and 1.14,respectively.The design simulation results are basically consistent with the experimental results.This paper provides an idea for the quantitative calculation of the non temperature controlled pump structure of a wide spectrum array laser.