Structured laser beams: toward 2-μm femtosecond laser vortices

Yongguang Zhao; Li Wang; Weidong Chen; Pavel Loiko; Xavier Mateos; Xiaodong Xu; Ying Liu; Deyuan Shen; Zhengping Wang; Xinguang Xu; Uwe Griebner; Valentin Petrov

doi:10.1364/PRJ.413276

Journals >Photonics Research >Volume 9 >Issue 3 >Page 357 > Article

Photonics Research
Vol. 9, Issue 3, 357 (2021)

Structured laser beams: toward 2-μm femtosecond laser vortices

Yongguang Zhao^1、2、*, Li Wang², Weidong Chen², Pavel Loiko³, Xavier Mateos⁴, Xiaodong Xu¹, Ying Liu¹, Deyuan Shen¹, Zhengping Wang⁵, Xinguang Xu⁵, Uwe Griebner¹, and Valentin Petrov¹

Author Affiliations

¹Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China

²Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany

³Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS-ENSICAEN, Université de Caen, Caen 14050, France

⁴Universitat Rovira i Virgili (URV), Física i Cristal·lografia de Materials i Nanomaterials (FiCMA-FiCNA), Marcel.li Domingo 1, 43007 Tarragona, Spain

⁵State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China

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DOI: 10.1364/PRJ.413276 Cite this Article Set citation alerts

Yongguang Zhao, Li Wang, Weidong Chen, Pavel Loiko, Xavier Mateos, Xiaodong Xu, Ying Liu, Deyuan Shen, Zhengping Wang, Xinguang Xu, Uwe Griebner, Valentin Petrov. Structured laser beams: toward 2-μm femtosecond laser vortices[J]. Photonics Research, 2021, 9(3): 357 Copy Citation Text

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Schematic of the passively mode-locked femtosecond TEM00 and HG10 laser using collinear and off-axis pumping (BM, bending mirror; L, lens; CM1–CM3, chirped mirrors; OC, output coupler).

Fig. 1. Schematic of the passively mode-locked femtosecond TEM00 and HG10 laser using collinear and off-axis pumping (BM, bending mirror; L, lens; CM1–CM3, chirped mirrors; OC, output coupler).

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(a) Optical spectra and (b), (c) interferometric autocorrelation traces of the mode-locked Tm:LuYO3 ceramic laser operating in TEM00 and HG10 modes. Insets of (b) and (c) show the corresponding far-field beam patterns (fs, femtosecond).

Fig. 2. (a) Optical spectra and (b), (c) interferometric autocorrelation traces of the mode-locked Tm:LuYO3 ceramic laser operating in TEM00 and HG10 modes. Insets of (b) and (c) show the corresponding far-field beam patterns (fs, femtosecond).

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Fig. 3. (a) Schematic of the SCL mode converter, and the recorded far-field (b), (e) HG10 and (c), (d), (f), (g) LG0,±1 beam patterns as the mode-locked laser operated in the first (middle row) and second (bottom row) femtosecond regimes (l, topological charge).

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Fig. 4. (a) Optical spectrum of the generated LG0,+1 modes and the corresponding interferometric autocorrelation traces in the (b) first and (c) second femtosecond regimes; (d) and (e) are the RF spectra of the femtosecond (112 fs) LG0,+1 beam in different span ranges. The inset in (c) shows the noncollinear autocorrelation trace recorded on a long time scale (RBW, resolution bandwidth).

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