Flexible generation of femtosecond cylindrical vector beams (Invited Paper)

Yuquan Zhang; Xiujie Dou; Yong Yang; Chen Xie; Jing Bu; Changjun Min; Xiaocong Yuan

doi:10.3788/COL201715.030007

Chinese Optics Letters, Volume. 15, Issue 3, 030007(2017)

Flexible generation of femtosecond cylindrical vector beams (Invited Paper)

Yuquan Zhang^1,2, Xiujie Dou¹, Yong Yang², Chen Xie³, Jing Bu^2,4、*, Changjun Min¹, and Xiaocong Yuan¹

¹Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

²Key Laboratory of Optical Information Science and Technology of the Education Ministry of China, Institute of Modern Optics, Nankai University, Tianjin 300071, China

³Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Technical Science of Ministry of Education, College of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China

⁴College of Mathematics and Statistics, Shenzhen University, Shenzhen 518060, China

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Fig. 1. Configuration of generation of negative first-order fs pulsed CVB. Any other orders can be generated by inserting the VR and 1/2λ plates. The blue arrows in the subgraph are the direction of the VR’s fast axis, and the black ones depict polarization of generated CVBs.

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Fig. 2. Detection of output fs pulsed CVBs. (a)–(d) polarization distribution of the first, second, third, and fourth-order fs pulsed CVBs, (e)–(h) the intensity distribution of CVBs, which are generally similar and donut-shaped but with different radius ratios, (i)–(l) petal intensity distribution of CVBs after a polarizer.

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Fig. 3. Petal intensity distribution after the polarizer with different polarization angles (θ).

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Fig. 4. (a) Time domain comparison and (b) optical spectrum of the input beam and generated CVBs. The pulse is stretched by several fs for each optical component, and it only shows a slight difference in the spectral profile.

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Table 1. Experimental Pulse Statistics of the Original and Generated Beams
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Table 1. Experimental Pulse Statistics of the Original and Generated Beams
Autocorrelation width/fs Power/mW
Original beam 52 434.5
1-order CVB 58 430.6
−1-order CVB 72 425.9
3-order CVB 84 419.7

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Yuquan Zhang, Xiujie Dou, Yong Yang, Chen Xie, Jing Bu, Changjun Min, Xiaocong Yuan, "Flexible generation of femtosecond cylindrical vector beams (Invited Paper)," Chin. Opt. Lett. 15, 030007 (2017)

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