We report on efficient intracavity coherent addition of several single high-order mode distributions in a multichannel laser resonator. The phase locking and coherent addition is achieved by using an intracavity interferometric beam combiner. The principle, configuration, and experimental results with pulsed Nd:YAG Laguerre-Gaussian TEM_01 and TEM_02 laser beam distributions are presented. The results reveal more than 95% combining efficiency with a nearly pure high-order mode output beam distribution in both free-running and Q-switched operation.
© 2005 Optical Society of America
A. A. Ishaaya, V. Eckhouse, L. Shimshi, N. Davidson, and A. A. Friesem, "Intracavity coherent addition of single high-order modes," Opt. Lett. 30, 1770-1772 (2005)