VOx/NaVO3 nanocomposite as a novel saturable absorber for passive Q-switching operation

Linghao Kong; Hongwei Chu; Na Li; Han Pan; Shengzhi Zhao; Dechun Li

doi:10.3788/COL202220.051601

Journals >Chinese Optics Letters >Volume 20 >Issue 5 >Page 051601 > Article

Chinese Optics Letters
Vol. 20, Issue 5, 051601 (2022)

VO_x/NaVO₃ nanocomposite as a novel saturable absorber for passive Q-switching operation

Linghao Kong¹, Hongwei Chu^1、*, Na Li², Han Pan¹, Shengzhi Zhao¹, and Dechun Li^1、**

Author Affiliations

¹School of Information Science and Engineering, Shandong University, Qingdao 266237, China

²School of Physics and Technology, University of Jinan, Jinan 250022, China

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DOI: 10.3788/COL202220.051601 Cite this Article Set citation alerts

Linghao Kong, Hongwei Chu, Na Li, Han Pan, Shengzhi Zhao, Dechun Li. VO_x/NaVO₃ nanocomposite as a novel saturable absorber for passive Q-switching operation[J]. Chinese Optics Letters, 2022, 20(5): 051601 Copy Citation Text

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VOx/NaVO3 composite material characterization: (a) SEM; (b) O elemental mapping; (c) V elemental mapping; (d) Na elemental mapping; (e) HRTEM; (f) SAED pattern; (g) XRD pattern; and (h) Raman spectrum.

Fig. 1. VO_x/NaVO₃ composite material characterization: (a) SEM; (b) O elemental mapping; (c) V elemental mapping; (d) Na elemental mapping; (e) HRTEM; (f) SAED pattern; (g) XRD pattern; and (h) Raman spectrum.

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Nonlinear transmission of VOx/V2O3 nanocomposite versus (a) Z axis at 1.3 µm, (b) intensity at 1.3 µm, (c) Z axis at 2 µm, and (d) intensity at 2 µm.

Fig. 2. Nonlinear transmission of VO_x/V₂O₃ nanocomposite versus (a) Z axis at 1.3 µm, (b) intensity at 1.3 µm, (c) Z axis at 2 µm, and (d) intensity at 2 µm.

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Fig. 3. Schematic setup for the Q-switching operations at 1.3 and 2 µm with VO_x/NaVO₃ saturable absorber (gain: NdVO₄ for 1.3 µm and Tm:YLF for 2 µm, SA: VO_x/NaVO₃).

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Fig. 4. Passive Q-switching operation at 1.3 µm with VO_x/NaVO₃ saturable absorber. (a) CW and Q-switched output power, (b) pulse duration and repetition rate, (c) pulse train, and (d) temporal pulse profile.

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Fig. 5. Passively Q-switched Tm:YLF laser at ∼ 2 µm with VO_x/NaVO₃ saturable absorber. (a) CW and Q-switched output power, (b) pulse duration and repetition rate, (c) pulse train, and (d) temporal pulse profile.

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Wavelength (μm)	$β_{eff}$ (cm/GW)	$Δ T$ (%)	$I_{s}$ ( $MW / {cm}^{2}$ )	$T_{ns}$ (%)
1.3	−0.66	13	59.7	10
2.0	−0.81	10.5	49.4	6

Table 1. Nonlinear Absorption Parameters of VO_x/NaVO₃

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SA	Crystal	λ [μm]	Width [ns]	Rate [kHz]	Ref.
BP	Nd:YVO₄	1.3	72	625	^[40]
BP	Tm,Ho:LuVO₄	2	2890	128.4	^[41]
${MoS}_{2}$	Nd:LuAG	1.3	188	73	^[42]
${MoS}_{2}$	Tm:YAP	2	916	105.1	^[43]
${Fe}_{3} O_{4}$ at ${Ti}_{3} C_{2}$	Nd:YVO₄	1.3	181	209	^[32]
${Fe}_{3} O_{4}$ at ${Ti}_{3} C_{2}$	Tm:YLF	2	320	118	^[32]
VO_x $/ {NaVO}_{3}$	Nd:GdVO₄	1.3	129	274	This
VO_x $/ {NaVO}_{3}$	Tm:YLF	2	292	155	work