Generation of two-color polarization-adjustable radiation pulses for storage ring light source
- 26 Downloads
To date, two-color pulses are widely used in pump–probe experiments. For a ring-based light source, the power of the spontaneous radiation fluctuates randomly in the longitudinal direction. It is difficult to produce two-color double pulses by optical methods. In this paper, we introduce a method based on the echo-enabled harmonic generation scheme that generates two-color pulses in a storage ring light source. By adopting crossed undulators and a phase shifter, the polarization of the two-color pulses can be easily switched. A numerical simulation based on a diffraction-limited storage ring, the Hefei Advanced Light Source, suggests that the time delay and spectral separation of the two pulses can be adjusted linearly by changing the pulse duration and chirp parameters of the seed laser. A circular polarization degree above 80% could be achieved.
KeywordsTwo-color pulses Echo-enabled harmonic generation Diffraction-limited storage ring Crossed undulators Circular polarization
The authors thank Guanqun Zhou at IHEP, Tong Zhang at FRIB, Ling Zeng, and Gang Zhao at Peking University for helpful discussions.
- 21.R. Molo, M. Höner, H. Huck et al., EEHG and Femtoslicing at DELTA, in Proceedings of FEL2013, New York, USA, pp. 594–597 (2013)Google Scholar
- 25.N. Hu, Z.H. Bai, W. Li et al., Estimates of collective effects in the HALS storage ring having the first version lattice, in Proceedings of IPAC2017, Copenhagen, Denmark, pp. 3770–3773 (2017)Google Scholar
- 26.Z.H. Bai, W. Li, L. Wang et al., Design of the second version of the HALS storage ring lattice, in Proceedings of IPAC2018, Vancouver, BC, Canada, pp. 4601–4604 (2018)Google Scholar
- 28.M. Born, W. Emil, Principles of Optics (Cambridge University Press, Cambridge, 2009)Google Scholar
- 30.M. Borland, Elegant: A flexible SDDS-compliant code for accelerator simulation, Advance Photon Source. United States: N. p. (2000). https://doi.org/10.2172/761286
- 32.N. Hay, I. Baker, Y. Guo et al., Stability-enhanced, high-average power green lasers for precision semiconductor, in Processing in Solid State Lasers XXI: Technology and Devices (Vol. 8235, p. 82351E)Google Scholar
- 33.M. Poulter, N. Hay, B. Fulford et al., Q-switched Nd: YAG lasers for high average-power and high peak-power operation, in Processing in Solid State Lasers XVIII: Technology and Devices (Vol. 7193, p. 719309)Google Scholar