High Power Laser Science and Engineering, Volume. 2, Issue 1, 010000e1(2014)
Large aperture N31 neodymium phosphate laser glass for use in a high power laser facility
Figures & Tables(8)
Fig. 1. Gain profiles of N3122 and N3130 glass rods of size 
8 
162 mm at various xenon lamp pumping
voltages. N3122 and N3130 correspond to the glasses with 
concentration of 2.2 wt% and 3.0 wt%.
Fig. 2. Large size N31 glass running from the annealing lehr of a continuous melting line.
Fig. 3. Gain coefficient of 400 mm aperture N3135 glass slabs from pot melting and continuous melting.
Fig. 4. 633 nm transmitted wavefront of a N3135 glass slab of size 810 
460 
. (a) The left part of 400 
and (b) the right part of 400 
.
Fig. 5. The stress distribution of 400 mm aperture N31 glass slab before and after cladding.
Table 1. Main parameters of neodymium phosphate laser glasses from Hoya[1], Schott[1], Russia (GOI)[4, 9], and SIOM.
View tableView in ArticleTable 1. Main parameters of neodymium phosphate laser glasses from Hoya[1], Schott[1], Russia (GOI)[4, 9], and SIOM.
Parameters N31 LHG-8 LG-770 KGSS-0180 
3.8 3.6 3.9 3.6 
s351 365 351 
/nm25.8 26.5 25.4 d/g/ 
2.87 2.83 2.59 2.83 
1.540 1.5296 1.5067 
1.533 1.5201 1.4991 Abbe number 65.8 66.5 68.4 
esu1.18 1.12 1.01 1.1 Tg/ 
C450 485 460 460 
/K(20–
C)115 115 116 116 dn/dT/10 
/K
dS/dT/10 
/K14 6 11 k/W/m K 0.56 0.58 0.57 E/Gpa 56.4 50.1 47.3 59.0
Table 2. Parameters of mass production N3135 glass.
View tableView in ArticleTable 2. Parameters of mass production N3135 glass.
Parameters Data Attenuation at 1053 nm 
0.10–0.14% Fluorescent lifetime ( 
s)310–315 n 
1.540 
0.001Absorption coefficient at 400 nm 
0.12–0.23 Absorption coefficient at 
(
)0.5-1.8 Optical homogeneity 
2 
Platinum inclusion No platinum for more than 80% glass slabs Damage threshold at 1064 nm, 3 ns No bulk damage at 
energy influence
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Lili Hu, Shubin Chen, Jingping Tang, Biao Wang, Tao Meng, Wei Chen, Lei Wen, Junjiang Hu, Shunguang Li, Yongchun Xu, Yasi Jiang, Junzhou Zhang, and Zhonghong Jiang. Large aperture N31 neodymium phosphate laser glass for use in a high power laser facility[J]. High Power Laser Science and Engineering, 2014, 2(1): 010000e1
Paper Information
Received: Oct. 17, 2013
Accepted: Dec. 13, 2013
Published Online: Dec. 26, 2014
The Author Email: Lili Hu (hulili@siom.ac.cn)
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