In order to investigate the effect of neodymium doped crystal on the l aser power balance mechanism,experiments were carried out on the power balance experiments of neodymium doped crystal dua l-frequency microchip lasers (DFLs) with different parameters.In the experiments,by changing the pump power and adjusting the hea t sink temperature,the dynamic relationship among the heat sink temperature,pump power and balanced dual-frequency laser p ower product were obtained.The experimental results show that for the neodymium doped DFLs,w hen power balance is achieved,with the increase of the pump power,the heat sink temperature decreases and is negatively correl ated to the pump power.Therefore,the lower of the heat sink temperature is required for the power re-balance.The power produ cts of the dual-frequency lasers increase with the pump power increasing and is positively correlated.However,the center wavelengt hs and the frequency separations remain almost unchanged.All the results indicate that for neodymium doped crystal dual-freq uency microchip lasers with different parameters, the power balanced dual-frequency laser signal output which is power-adjustabl e can be achieved by changing the pump power and controlling the heat sink temperature.Such a power tunable DFL has a great a pplication in the field of optical millimeter-wave generation.