Broadband Petal‐Like Raman Laser

Abstract High‐order Laguerre‐Gaussian (LG 0, n ) petal‐like lasers are extremely important for manipulating microparticles, creating 3D optical trapping structures, and free space optical communication. However, it is difficult to expand the wavelength of LG 0, n petal‐like lasers owing to the narrow fluorescence spectrum of laser gain media. Here, a Raman laser constructed with a Yb 3+ :Y 3 Al 5 O 12 (Yb:YAG) crystal and a yttrium vanadate (YVO 4 ) is demonstrated for achieving a high‐order LG 0, n petal‐like laser with broadband laser wavelength and high beam quality. High‐order LG 0, n petal‐like lasers with n tunable from 3 to 11 are obtained. The LG 0,11 petal‐like Raman laser oscillates from 1075.4 to 1088.7 nm with 44 longitudinal modes, and the bandwidth of the Raman laser is 13.3 nm. The output power of the LG 0,11 petal‐like Raman laser is 126 mW with an optical efficiency of 1.5%. High‐order LG 0, n petal‐like Raman lasers with tunable n provide flexible choices for potential applications in manipulating microparticles and biological molecules.