Broadband Hybridly Polarized Vector Vortex Raman Microchip Laser |
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Authors: | Yujie Miao Qinan Shi Xingyu Zhu Lin Zhang Hongsen He Jun Dong |
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Institution: | 1. Laboratory of Laser and Applied Photonics (LLAP), Department of Electronic Engineering, School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 China;2. Laboratory of Laser and Applied Photonics (LLAP), Department of Electronic Engineering, School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 China
Fujian Key Laboratory of Ultrafast Laser Technology and Applications, Xiamen University, Xiamen, 361005 China |
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Abstract: | Hybridly polarized (HP) vector vortex Raman lasers dramatically extend their applications on optical microscopy, optical communication, and quantum information. Spatial light modulators and waveplates are widely used for generating HP vector vortex lasers, however, the performance and beam quality of HP vector vortex lasers are restricted by diffraction loss and low damage threshold of these optical elements. Here, HP vector vortex Raman microchip lasers constructed with Yb3+:Y3Al5O12 (Yb:YAG) and vanadate (YVO4) crystals is demonstrated. The states of polarization (SoP) of HP vector vortex lasers are combination of radial and anti-radial polarizations (RP-ARP), azimuthal and anti-azimuthal polarizations (AP-AAP). The SoP of HP vector vortex lasers can be controlled by adjusting the length of YVO4 crystal and applying pump power. Maximum output powers are 456 and 586 mW with optical efficiency of 7.1% and 9.2% for HP vector vortex lasers with SoP of RP-ARP and AP-AAP. The HP vector vortex Raman lasers with SoP of RP-ARP and AP-AAP oscillate ≈1076 nm with bandwidths of 11.4 and 10.8 nm. High beam quality is achieved for HP vector vortex lasers with measured M2 nearly equal to theoretical value. The broadband HP vector vortex Raman lasers with high beam quality extend applications on optical trapping, and quantum information processing. |
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Keywords: | hybrid polarization microchip lasers optical vortex Raman lasers vector vortex lasers |
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