Yujing Han, Jinguang Wang, Jinglong Ma, Guoqian Liao, Yutong Li, Liming Chen, Jie Zhang. Production of a broadband femtosecond optical vortex by use of a continuous spiral phase plate[J]. Chinese Optics Letters, 2015, 13(Suppl.): S22602
- Chinese Optics Letters
- Vol. 13, Issue Suppl., S22602 (2015)
Fig. 1. (a) Schematic of experiment setup and (b) 3D structure of the SPP.
Fig. 2. Spectrum of the femtosecond laser oscillator and main amplifier laser before compression.
Fig. 3. Intensity distribution of the optical vortex under the aperture with a diameter of 20 mm.
Fig. 4. Intensity distribution of the optical field by setting a cylindrical lens before the CCD.
Fig. 5. Purity of the optical vortex as a function of wavelength.
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