Research Progress of Raman and Frequency Mixing for Visible Lasers Based on Vanadate Crystals

Mengyao Cheng; Yanmin Duan; Yinglu Sun; Li Zhang; Haiyong Zhu

doi:10.3788/LOP57.071611

Journals >Laser & Optoelectronics Progress >Volume 57 >Issue 7 >Page 071611 > Article

Laser & Optoelectronics Progress
Vol. 57, Issue 7, 071611 (2020)

Research Progress of Raman and Frequency Mixing for Visible Lasers Based on Vanadate Crystals

Mengyao Cheng, Yanmin Duan^*, Yinglu Sun, Li Zhang, and Haiyong Zhu^**

Author Affiliations

Institute of Laser and Optoelectronic Technology, Wenzhou University, Wenzhou, Zhejiang 325035, China

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DOI: 10.3788/LOP57.071611 Cite this Article Set citation alerts

Mengyao Cheng, Yanmin Duan, Yinglu Sun, Li Zhang, Haiyong Zhu. Research Progress of Raman and Frequency Mixing for Visible Lasers Based on Vanadate Crystals[J]. Laser & Optoelectronics Progress, 2020, 57(7): 071611 Copy Citation Text

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Raman shift characteristic diagram of YVO4 crystal[16]

Fig. 1. Raman shift characteristic diagram of YVO₄ crystal^[16]

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Fig. 2. Two kinds of bonded crystals designed for experiments

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Fig. 3. Multi-wavelength switchable laser operation mechanism based on self-Raman and selective frequency mixing

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Crystal	Ramanshift /cm^-1	Raman linewidth /cm^-1	Raman gain at1064 nm/(cm·GW^-1)	Damage threshold /(GW·cm^-2)
PbMO₄	870	8	~8	~0.4
BaWO₄	925	1.6	8.5	-
SrWO₄	922	2.7	5	~5
GdVO₄	885	3.0	>4.5	~1
YVO₄	890	2.6	>4.5	~1
Ba(NO₃)₂	1047	0.4	11	~0.4
KGW	768	6.4	4.4	~10
	901	5.4	3.5

Table 1. Raman performance parameters of common Raman crystals^[9]

Crystal	Tetragonal Nd∶YVO₄	Tetragonal Nd∶GdVO₄	Tetragonal Nd∶LuVO₄
Wavelength of⁴ $\begin{matrix} F_{\frac{3}{2}}^{4} \end{matrix}$ -I_11/2 transition /nm	1064	1063	1066
Stimulated cross section of⁴ $\begin{matrix} F_{\frac{3}{2}}^{4} \end{matrix}$ -I_11/2 transition /(10^-19 cm²)	12	7.6	14.6
Fluorescence lifetime /μs	90	90	129
Raman gain@1064 nm /(cm·GW^-1)	>4.5	>4.5	>3.2
Raman shift /cm^-1	890	885	900
Raman line width /cm^-1	2.6	3.0	5.0
Thermalconductivity /(W·m^-1·K^-1)	5.2	11.7	9.7

Table 2. Crystal performance and energy level transition parameters

Crystal	BBO	LBO	KTP
PM type	CPMI	NCPMI	CPMII
Temperature /K	300	315	300
d_eff/(pm·V^-1)	2	0.839	3.5
PM angle	θ=21.5°	θ=90°,ϕ=0°	θ=69°,ϕ=0°
Walk-off angle /mrad	52.87	0	34.32

Table 3. Phase-matching parameters for second harmonic generation at 1176 nm

Wavelengthconversion	1064 nmSHG	1064 nm &1176 nm SFG	1176 nmSHG	1176 nm &1313 nm SFG	1313 nmSHG
Outputwavelength /nm	532	559	588	620	657
LBO PM angle	θ=90°,ϕ=11.3°	θ=90°,ϕ=7.9°	θ=90°,ϕ=3.7°	θ=86.7°,ϕ=0°	θ=85.8°,ϕ=0°
LBO PMtemperature /℃	149	89	41	10	-1
BBO PM angle /(°)	22.9	22.1	21.5	20.9	20.4

Table 4. Phase-matching parameters of nonlinear optical crystals with different frequency mixing mechanisms corresponding to different wavelength combinations

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