Research of Yb-Doped Rare-Earth Calcium Oxyborate Crystal Lasers

Fenfen Liu; Shuxuan Cao; Junhai Liu

doi:10.3788/LOP57.071604

Journals >Laser & Optoelectronics Progress >Volume 57 >Issue 7 >Page 071604 > Article

Laser & Optoelectronics Progress
Vol. 57, Issue 7, 071604 (2020)

Research of Yb-Doped Rare-Earth Calcium Oxyborate Crystal Lasers

Fenfen Liu^1、2, Shuxuan Cao¹, and Junhai Liu^1、*

Author Affiliations

¹College of Physics, Qingdao University, Qingdao, Shandong 266071, China

²Aviation Foundation College, Aeronautical University, Yantai, Shandong 264001, China

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DOI: 10.3788/LOP57.071604 Cite this Article Set citation alerts

Fenfen Liu, Shuxuan Cao, Junhai Liu. Research of Yb-Doped Rare-Earth Calcium Oxyborate Crystal Lasers[J]. Laser & Optoelectronics Progress, 2020, 57(7): 071604 Copy Citation Text

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Crystal	T /%	P_avr /W	PRF /MHz	E_p /μJ	t_p /ns	P_p /W	η_s /%	λ_c /nm
Yb∶YCOB	70	3.85	0.400	9.63	96	100.3	28	1033.3
Yb∶GdCOB	50	2.38	0.325	7.32	104	70.4	36	1034.1
Yb∶LaCOB	30	1.76	0.140	12.6	288	43.8	38	1079.2
Yb∶LuPO₄	50	5.02	1.67	3.0	55	54.5	54	1014.5

Table 1. 2 Pulsed laser parameters for Yb∶YCOB, Yb∶GdCOB, Yb∶LaCOB, and Yb∶LuPO₄ crystals, obtained in passive Q-switching with Bi₂Te₃

Crystal	T /%	P_avr /W	PRF /MHz	E_p /μJ	t_p /ns	P_p /W	η_s /%	λ_c /nm
Yb∶YCOB	80	4.05	0.606	6.67	66	101.0	47	1036.4
Yb∶LuPO₄	80	4.35	1.33	3.41	28.6	110.0	47	1010.9
Yb∶KLuW	80	1.87	2.18	1.19	39	30.5	71	1024.2

Table 1. 0 Pulsed laser parameters for Yb∶YCOB, Yb∶LuPO₄, and Yb∶KLuW crystals, obtained in passive Q-switching with 2D WS₂ as saturable absorber

Crystal	T /%	P_avr /W	PRF /MHz	E_p /μJ	t_p /ns	P_p /W	η_s /%	λ_c /nm
Yb∶YCOB	40	1.58	0.704	2.25	52	40.8	36	1035.5
Yb∶LaCOB	70	2.11	0.357	6.6	103	52.4	32	1037.8
Yb∶KLuW	80	2.06	2.18	1.30	36	36.1	56	1030.6

Table 1. 1 Pulsed laser parameters for Yb∶YCOB, Yb∶LaCOB, and Yb∶KLuW crystals, obtained in passive Q-switching with 2D MoTe₂ as saturable absorber

Crystal	T_opt /%	P_th /W	P_out /W	η_opt /%	η_s /%	λ_c /nm	Pol.
Yb∶YCOB (Y-cut)	10	0.80	22.1	54	71	1042.5	E∥Z
Yb∶GdCOB (Z-cut)	10	1.02	18.2	55	70	1031.5	E∥X
Yb∶YGdCOB (Y-cut)	10	0.79	23.0	57	70	1044.7	E∥Z
Yb∶LaCOB (Y-cut)	10	0.64	8.4	47	51	1046.0	E∥Z

Table 1. Comparison of CW laser parameters in the main emission band for different Yb∶ReCOB crystals

Crystal	T /%	P_th /W	P_out /W	η_opt /%	η_s /%	λ_l /nm	Pol.
Yb∶YCOB (Z-cut)	1.3	0.16	10.7	56	65	1082-1085	E∥X
Yb∶YGdCOB (Z-cut)	1	0.14	18.1	60	70	1082-1086	E∥X
Yb∶LaCOB (Y-cut)	1	0.14	11.0	62	67	1077-1080	E∥X, E∥Z

Table 2. Comparison of CW laser parameters in the long-wavelength side band for different Yb∶ReCOB crystals

Crystal	T /%	P_th /W	P_out /W	η_opt /%	η_s /%	Pol.	λ_l /nm
Yb∶YCOB (X-cut)	5	0.40	13.0	45.1	53	E∥Z	1063.2-1066.1
Yb∶YCOB (Y-cut)	5	0.40	15.0	46.3	54	E∥XE∥Z	1083.5-1084.41063.3-1067.2
Yb∶YCOB (Z-cut)	5	0.36	15.5	44.4	52	E∥X	1083.6-1085.5
Yb∶YGdCOB (Z-cut)	3	0.33	16.2	50.3	58	E∥X	1083-1085

Table 3. CW laser parameters in the long-wavelength side band for different Yb∶ReCOB crystals, under the conditions of suppressing the main emission band laser oscillation

Parameter	PRF /kHz
Parameter	30	10	5	2	0.5	0.2
P_in,max /W	41.3	36.0	36.0	29.2	21.3	21.3
P_avr,max /W	10.2	8.8	6.5	4.2	1.6	1.0
E_p /mJ	0.34	0.88	1.3	2.1	3.2	5.0
t_p /ns	132	43	26	16	14	17
P_p /kW	2.6	20.5	50.0	131.3	214.3	294.1

Table 4. Acousto-optic Q-switching laser parameters of Yb∶YCOB crystal at different PRF values

Parameter	PRF /kHz
Parameter	30	10	5	2	0.5	0.2
P_in,max /W	34.2	34.2	25.6	23.5	21.0	19.6
P_avr,max /W	10.2	8.7	6.1	3.8	1.55	0.95
E_p /mJ	0.34	0.87	1.2	1.9	3.1	4.75
t_p /ns	108	36	26	20	17	11
P_p /kW	3.1	24.2	46.2	95.0	182.4	431.8

Table 5. Acousto-optic Q-switching laser parameters of Yb∶GdCOB crystal at different PRF values

Crystal	Q-switching conditions	P_avr,max /W	PRF /kHz	E_p /mJ	t_p /ns	P_p /kW	η_opt /%	η_s /%
Yb∶YCOB	T=20%, T₀=97.5%	10.7	26.3	0.36	22	16.4	42.9	53
	T=40%, T₀=90%	4.13	3.23	1.28	5	256	26.8	49
Yb∶GdCOB	T=20%, T₀=97.5%	15.6	91	0.17	22	7.8	44	53
	T=60%, T₀=84%	4.2	5.7	0.74	3.6	205	12	21

Table 6. Pulsed laser parameters obtained in passive Q-switching with Cr⁴⁺∶YAG under CW pump for different Yb∶ReCOB crystals

Crystal	P_avr /W	PRF /kHz	E_p /μJ	t_p /ns	P_p /kW	η_opt /%	λ_c /nm
Yb∶YCOB	5.7	166.7	30	153	0.20	21.3	1032.0
Yb∶GdCOB	3.8	100.0	38	79	0.48	20.9	1027.5
Yb∶LuPO₄	5.0	333.3	15	68	0.22	26.6	1003.0

Table 7. Pulsed laser parameters for different crystals, obtained in passive Q-switching with GaAs in the high-repetition-rate high-power mode

Crystal	P_avr /W	PRF /kHz	E_p /mJ	t_p /ns	P_p /kW	η_opt /%	λ_c /nm
Yb∶YCOB	1.02	1.0	1.02	13.6	75.0	3.5	1022.7
Yb∶GdCOB	1.31	1.92	0.68	9.0	75.6	5.4	1027.0
Yb∶LuPO₄	0.84	3.7	0.23	5.5	41.3	4.9	1002.0

Table 8. Pulsed laser parameters for different crystals, obtained in passive Q-switching with GaAs in the low-repetition-rate high-energy mode

Crystal	P_avr /W	PRF /kHz	E_p /mJ	t_p /ns	P_p /kW	λ_c /nm
Yb∶YAG	1.39	35.7	53.0	3.5	11.1	1030.8
Yb:YGG	1.40	43.5	52.0	3.5	12.4	1025.5
Yb:LuGG	1.10	19.6	82.4	3.3	17.0	1025.8
Yb:GGG	1.53	41.7	55.0	3.4	12.7	1025.7

Table 9. Pulsed laser parameters for Yb-doped garnet crystals, obtained in passive Q-switching with GaAs

Fenfen Liu, Shuxuan Cao, Junhai Liu. Research of Yb-Doped Rare-Earth Calcium Oxyborate Crystal Lasers[J]. Laser & Optoelectronics Progress, 2020, 57(7): 071604

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