Broadband Petal‐Like Raman Laser

High-order Laguerre-Gaussian (LG0,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 LG0,n petal-like lasers owing to the narrow fluorescence spectrum of laser gain media. Here, a Raman laser constructed with a Yb3+:Y3Al5O12 (Yb:YAG) crystal and a yttrium vanadate (YVO4) is demonstrated for achieving a high-order LG0,n petal-like laser with broadband laser wavelength and high beam quality. High-order LG0,n petal-like lasers with n tunable from 3 to 11 are obtained. The LG0,11 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 LG0,11 petal-like Raman laser is 126 mW with an optical efficiency of 1.5%. High-order LG0,n petal-like Raman lasers with tunable n provide flexible choices for potential applications in manipulating microparticles and biological molecules.