Laser-phased-array (LPA) technology has attracted many researchers for its potential application in commercial and military fields for several decades. As a phased optical array (OPA), LPA can inherently support beam steering at the highest levels of both precisions (sub-micro radian) and resolution (tens of thousands of Rayleigh spots per dimension), which adopt the laser as the light source and achieve the relative phases constant between the elements by controlling the degree of each array element.
Much progress for LPA has been achieved worldwide to obtain good performance for scanning beam in recent years, including larger scanning angle and higher power. Meanwhile, who provided some LPA systems based on fiber, waveguide, PZT, and liquid crystal theoretically. However, it is difficult to obtain good performance practically because the LPA system's performance is affected by many factors. For example, pump beam quality, phase accuracy, polarization, the distance between adjacent coherence beams, and impacts produced by the temperature variation and vibration. It is the most necessary for precise and rapid phase controlling to improve the performance.
The Lithium Niobate (LiNbO3) phase modulator can control the grade in the LPA system for its okay electro-optic effect, quick response speed, precise control of phase, which will develop the performance of the LPA system.