Effect of Iron and Copper Impurity Ions on LaserEfficiency of Phosphate Laser Glass

doi:10.15541/jim20140408

Abstract

Abstract:

The effect of impurity such as Fe and Cu ions on the optical loss and laser performance of N31-type Nd-doped phosphate laser glass was studied. It was found that the laser slope efficiency decreased in accordance with an e exponential function, and the laser threshold increased in quadratic with the increase of Fe concentration. Moreover, the empirical equations between concentration of Fe with laser slope efficiency and laser threshold were obtained. It also showed that laser efficiency was seriously influenced by Cu ion compared with that by Fe ion at the same concentration. The results are useful for improving the gain performance of laser glass and quantitatively control of the impurity in raw materials in the future.

Key words: Nd-doped phosphate laser glass, optical absorption, fluorescent lifetime, laser efficiency

CLC Number:

TQ171

XU Yong-Chun, CHEN Dan-Ping, LI Shun-Guang, HU Li-Li, TANG Jing-Ping. Effect of Iron and Copper Impurity Ions on Laser
Efficiency of Phosphate Laser Glass[J]. Journal of Inorganic Materials, 2015, 30(3): 240-244.

Figures/Tables 7

Fig. 1 Measurement of laser efficiency

Table 1 Fe ion contents, fluorescent lifetime, optical absorption at 1053 nm, laser efficiency and threshold of N31 laser glasses

Sample	Fe ion contents /(μg?g^-1)	Fluorescent lifetime/μs	Optical absorption(α_Fe) /(%?cm^-1)	Laser efficiency/%	Laser threshold /J
N31-Fe1	67	328	0.21	0.29	16.2
N31-Fe2	73	328	0.25	0.27	16.8
N31-Fe3	94	326	0.43	0.24	18.0
N31-Fe4	264	316	1.58	0.13	43.2
N31-Fe5	520	300	3.40	0.05	83.2
N31-Fe6	747	292	5.33	0.02	148.0

Table 2 Cu ion contents, fluorescent lifetime, optical absorption at 1053 nm, laser efficiency and threshold of N31 laser glasses

Sample	Cu ion contents /(μg?g^-1)	Fluorescent lifetime /μs	Optical absorption(α_Cu) /(%?cm^-1)	Laser efficiency/%	Laser threshold /J
N31-Cu1	15.5	305	4.6	0.026	105.1
N31-Cu2	20.5	300	5.8	0.016	134.5

Fig. 2 Input and output energy as a function of Fe ion concentrations in N31 phosphate glasses

Fig. 3 Slope efficiency and optical absorption as a function of Fe concentrations in N31 phosphate glasses

Fig. 4 Laser threshold and optical absorption as a function of Fe concentrations in N31 phosphate glasses

Fig. 5 Input and output energy as a function of Cu concentrations in N31 phosphate glasses

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