Optics and Photonics Society of Iran

In recent years much effort has been expended toward high-power CW lasers on the order of tens of kilowatts and greater. The key challenge in such scaling is maintaining near-diffraction-limited beam quality. In this paper, the coherent beam combination of three laser beams have been simulated. These simulations are compared to the experimental results which shows complete conformity with each other. In experimental setup the phase of branches are locked to each other using an active controllable phase modulator which is done for the first time in the country. SPGD algorithm, is used in control system for phase change feed-back in phase modulators. This phase control system, changes beam phase in a way that the center spot in the far-field pattern has fix position and gains the maximum accessible power.