[10a-PA2-1~13] 3.4 Laser system and materials

[10a-PA2-7] Aligning coherent beams with high angular precision: A new method for pointing adjustment and control

〇Haik Chosrowjan^1,2, Seiji Taniguchi^1,2, Masayuki Fujita^1,2, Yoshiki Nakata², Noriaki Miyanaga^1,2,3 (1.ILT, 2.Osaka Univ., 3.PLT)

Keywords:

coherent beam combining,beam alignment

In many advanced applications, aligning multiple laser beams within a restricted area with ultra-high angular precision (~ micro-rad) is challenging. In this presentation, we will discuss the efficiency degradation of coherent beam combining (CBC) caused by multiple-beam alignment mismatch (centering and pointing). A new method for pointing adjustment and control in CBC will be presented, quantitatively elucidated, and demonstrated experimentally. It is estimated that an accuracy of up to 1/50th of the diffraction-limited divergence (DLD) angle can be achieved.