Untrafast smoothing scheme based on dynamic interference structure between beamlets of laser quad

Hao Xiong; Zhe-Qiang Zhong; Bin Zhang; Zhan Sui; Xiao-Min Zhang

doi:10.7498/aps.69.20190962

Journals >Acta Physica Sinica >Volume 69 >Issue 6 >Page 064206-1 > Article

Acta Physica Sinica
Vol. 69, Issue 6, 064206-1 (2020)

Untrafast smoothing scheme based on dynamic interference structure between beamlets of laser quad

Hao Xiong¹, Zhe-Qiang Zhong¹, Bin Zhang^1、*, Zhan Sui², and Xiao-Min Zhang²

Author Affiliations

¹College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China

²China Academy of Engineering Physics, Mianyang 621900, China

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DOI: 10.7498/aps.69.20190962 Cite this Article

Hao Xiong, Zhe-Qiang Zhong, Bin Zhang, Zhan Sui, Xiao-Min Zhang. Untrafast smoothing scheme based on dynamic interference structure between beamlets of laser quad[J]. Acta Physica Sinica, 2020, 69(6): 064206-1 Copy Citation Text

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Fig. 1. Schematic illustration of smoothing by dynamic interference structures of beamlets.

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Fig. 2. The contrast of focal spots with different phase modulation.

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Fig. 3. Dynamic interference structures with different kinds of phase modulation: (a) Tilted phase; (b) cylinder phase; (c) ellipsoid phase; (d) spiral phase.

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Fig. 4. (a) Variation of contrast with integral time and (b) FOAPI curves with different phase plate array.

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Fig. 5. Variation of contrast with integral time with different PV.

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Fig. 6. Variation of contrast with integral time of different Δλ: (a) 80% energy of the 600 μm × 500 μm focal spot; (b) 30% energy of the 600 μm × 500 μm focal spot; (c) 80% energy of the 350 μm × 350 μm focal spot.

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Fig. 7. Focused intensity distributions with different smoothing scheme: (a) CPP only; (b) 2D-SSD + CPP; (c) smoothing by dynamic interference structures of beamlets + CPP; (d) smoothing by dynamic interference structures of beamlets+2D-SSD + CPP.

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Fig. 8. (a) Variation of contrast with integral time and (b) FOPAI curves with different smoothing scheme.

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$ {\varphi }_{1}(x_{f}, y_{f}) $	$ B_{1}(x_{f}, y_{f}) $	$ b_{1}(x_{f}, y_{f}) $
x	$ {\delta }[x_{f}/({\lambda f})+1/(2\text{π} )]{\delta }[y_{f}/({\lambda f})] $	0
–x²	$ \text{π} ^{1/2}\delta [y_{f}/(\lambda f) ]$	$ \text{π} ^{2}x_{f}^{2}/({\lambda }^{2}f^{2})-3\text{π} /4 $
$ -[h_{1}{ }(x/w)^{2}+ h_{2}(y/w)^{2}] $	$ w^{2}\text{π} (h_{1}h_{2})^{-1/2} $	$ \text{π} ^{2}x_{f}^{2}/(h_{1}{\lambda }^{2}f^{2}w^{2})+\text{π} ^{2}y_{f}^{2}/(h_{2}{\lambda }^{2}f^{2}w^{2})-3\text{π} /2 $
$ \arctan(y/x) $	$ [-{\lambda f}/(2\text{π} )]\{ {\delta }[x_{f}/({\lambda f})]{\rm d}{\delta }[y_{f}/({\lambda f})]/{\rm d}y_{f }- {\rm i}{\delta }[y_{f}/({\lambda f})]{\rm d}\delta [x_{f}/({\lambda f})]/{\rm d}x_{f}\} $

Table 1.

2D-Fourier transform of different phase distribution.

不同相位分布的二维傅里叶变换表达式

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