Comparison of mid-infrared laser generated by optical parametric oscillation of BaGa4Se7 and KTiAsO4

Kong Hui; Bian Jintian; Ye Qing; Yao Jiyong; Wu Chang; Sun Xiaoquan

doi:10.3788/irla20190423

Journals >Infrared and Laser Engineering >Volume 49 >Issue 6 >Page 20190423 > Article

Infrared and Laser Engineering
Vol. 49, Issue 6, 20190423 (2020)

Comparison of mid-infrared laser generated by optical parametric oscillation of BaGa4Se7 and KTiAsO4

Kong Hui^1、2, Bian Jintian^1、2、*, Ye Qing^1、2, Yao Jiyong³, Wu Chang^1、2, and Sun Xiaoquan^1、2

Author Affiliations

¹[in Chinese]

²[in Chinese]

³[in Chinese]

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DOI: 10.3788/irla20190423 Cite this Article

Kong Hui, Bian Jintian, Ye Qing, Yao Jiyong, Wu Chang, Sun Xiaoquan. Comparison of mid-infrared laser generated by optical parametric oscillation of BaGa4Se7 and KTiAsO4[J]. Infrared and Laser Engineering, 2020, 49(6): 20190423 Copy Citation Text

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Fig. 1. Phase matching curve of BGSe and KTA( ) BGSe与KTA的相位匹配曲线( )

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Fig. 2. Schematic diagram of experiment setup

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Fig. 3. Idle light energy of BGSe-OPO and KTA-OPO at different pump light energies

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Name	BGSe	KTA
Characteristic	Biaxial, monoclinic, point group m^[11]	Uniaxial, point group mm2^[13]
Transmittance range	0.47-18µm^[14]	0.35-5.3 µm ^[10]
Damage threshold	557 MW/cm^2[14](5 ns,1.064 µm,1 Hz)	>600 MW/cm²
Nonzero tensor	d₁₁=24.3 pm/V, d₁₃=20.4 pm/V ^[15]	d₃₃=16.2 pm/V, d₃₁=2.8 pm/V, d₃₂=4.2 pm/V, d₃₁=2.8 pm/V d₂₄=3.2 pm/V, d₁₅=2.3 pm/V^[13],d_eff=4.47 pm/V^[10]

Table 1. Comparison between BGSe and KTA

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A_x	2.149 5	A_y	2.1308	A_z	2.193 1
B_x	1.020 3	B_y	1.056 4	B_z	1.238 2
C_x	0.042 378	C_y	0.042 523	C_z	0.059 171
D_x	0.553 1	D_y	0.692 7	D_z	0.508 8
E_x	72.304 5	E_y	54.850 5	E_z	53.289 8
p_x	1.995 1	p_y	2.001 7	p_z	1.892 0
q_x	1.956 7	q_y	1.726 1	q_z	2.000 0

Table 2. Sellmeier coefficients of KTA

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Parameter	Meaning	KTA	BGSe
/ns	Pulse width	10	10
/μm	Wavelength of signal light	1.54	1.50
/μm	Wavelength of idler light	3.43	3.64
	Refractive index of signal light	1.806 2	2.485 4
	Refractive index of idler light	1.773 0	2.461 1
	Refractive index of pump light	1.816 7	2.512 8
/F·m-1	Permittivity of vacuum
c/m·s-1	Velocity of light
/m·V-1	Effective nonlinear coefficient
/mm	Parametric effective gain length	20	15
/mm	Optical length of OPO cavity	46	52.5
/mm	Length of crystal	20	15

Table 3. Parameters of KTA-OPO and BGSe-OPO

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