[18a-P2-1~9] 3.2 Equipment optics and materials

△ [18a-P2-8] Beam propagation property of a high-efficiency ring beam converter with axicon mirrors

〇(M1)Yuya Shimoji¹, Godai Miyaji¹ (1.Tokyo Univ. of A & T)

Keywords:ring beam, axicon mirror, nondiffracting beam

We have designed and fabricated a new beam converter from a Gaussian beam to a ring beam, which consists of concave axicon mirrors, quarter-wave plates, and a polarizing beam splitter. The mode conversion efficiency was estimated to be ~80%, and the Rayleigh length of the ring beam was measured to be much longer than that of the Gaussian beam. These results obtained have shown that the converter can efficiently generate a nondiffracting beam from a Gaussian beam.