Photonics Research, Volume. 8, Issue 8, 1375(2020)
High-gain amplification for femtosecond optical vortex with mode-control regenerative cavity
Fig. 1. Evolution of an optical vortex seed with
Fig. 2. Setup of the proposed RA. QW, quarter-wave plate; QP, Q-plate; OC, optical coupling system; M, plane mirror; CM, concave mirror,
Fig. 3. Simulations of laser oscillations from noises with the different ring-shaped pump radii. Expansion ratios are (a) 4, (b) 3.5, and (c) 3.
Fig. 4. Simulation of vortex amplification with different seed energies.
Fig. 5. (a) Ring-shaped pump on one of the Ti:S surfaces, (b) the donut-shaped output from the unseeded RA, (c) the phase structure of our Dammann vortex grating, (d) the corresponding far-field with parallel illumination, and (e) the measured far-field illuminated by the output of the unseeded RA.
Fig. 6. Recorded spatial intensities of the seed with
Fig. 7. Recorded spatial intensities of the seed with
Fig. 8. (a) Spatial cross-section intensity of the amplified
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Shuiqin Zheng, Zhenkuan Chen, Qinggang Lin, Yi Cai, Xiaowei Lu, Yanxia Gao, Shixiang Xu, Dianyuan Fan, "High-gain amplification for femtosecond optical vortex with mode-control regenerative cavity," Photonics Res. 8, 1375 (2020)
Category: Ultrafast Optics
Received: Feb. 24, 2020
Accepted: Jun. 19, 2020
Published Online: Jul. 24, 2020
The Author Email: Shixiang Xu (shxxu@szu.edu.cn)