We propose and demonstrate a continuous-wave all-fiber ring laser generating cylindrical vector beams (CVBs) using a MSC as transverse mode converter and mode splitter. The MSC is fabricated by a novel method free of pre-tapering, achieving LP11 mode with a high purity of > 96% near the wavelength of 1064 nm. The CVB fiber laser operates at a center wavelength of 1053.9 nm, with a 3 dB linewidth of less than 0.04 nm and a signal-to-background ratio of > 60 dB. The laser slope efficiency is > 9%. The radially and azimuthally polarized beams can be switched by adjusting the polarization controllers in the fiber ring cavity, with a high mode purity measured to be > 96%.
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- Cylindrical vector beams
- optical fiber lasers
- mode converter
Wang, J., Wan, H., Cao, H., Cai, Y., Sun, B., Zhang, Z., & Zhang, L. (2018). A 1.0 μm Cylindrical Vector Beam Fiber Ring Laser Based on A Mode Selective Coupler. IEEE Photonics Technology Letters, 1-1. https://doi.org/10.1109/LPT.2018.2797990