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:doi:10.1364/PRJ.413276

Photonics Research, 2021, 9 (3): 03000357, Published Online: Feb. 24, 2021

Structured laser beams: toward 2-μm femtosecond laser vortices

Yongguang Zhao ^1,2,*Li Wang ²Weidong Chen ²Pavel Loiko ³Xavier Mateos ⁴Xiaodong Xu ¹Ying Liu ¹Deyuan Shen ¹Zhengping Wang ⁵Xinguang Xu ⁵Uwe Griebner ¹Valentin Petrov ¹

Author Affiliations

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

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

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

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

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

Figures & Tables

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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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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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): 03000357.

Structured laser beams: toward 2-μm femtosecond laser vortices

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).

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).

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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Structured laser beams: toward 2-μm femtosecond laser vortices

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).

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).

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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