SFG10 Silicate Glass
SFG10 silicate glass has high UV cutoff and infrared cut-off capability, it can be used as a laser cavity materials to absorb one micron and unwanted UV and IR radiation in high energy laser systems with high repetition rates.
- High optical density
- High transmittance of visible light
- Excellent light absorption characteristics
Parameter
| UV Cutoff (5mm,2% transmission) (nm) | 350 |
| IR Cutoff (nm) | 2500 |
| Refractive Index (d 589.3nm) | 1.563 |
| Refractive Index (1053nm) | 1.57 |
| Abbe Value | 56.6 |
| Transformation Temp. (℃) | 490 |
| Softening Temp. (℃) | 540 |
| Coeff.of Linear Thermal Expansion (10-7 /K) (30~100℃) | 87 |
| Coeff.of Linear Thermal Expansion (10-7 /K) (30~300℃) | 100 |
| Thermal Conductivity (25 ℃) (W/mK) | 1.1 |
| Density (g/cm3 ) | 2.87 |
| Dw(H2O 98℃) (mg/(cm2/day)) | 0.109 |
Diffuse-reflection Pumping Cavity
Two key technologies have been used in the pumping cavity. Firstly, SFG-silicate glass is used as a filter to prevent the color centers and reduce the thermal effects in the laser medium. Moreover, SFG-silicate glass
has a strong absorption at the emission peak of Nd3+, which is helpful to reduce the radial ASE and increase the stored energy in gain medium. Secondly, the reflector is diffuse type. By optimizing the pumping structure, uniform pumping distribution and high pumping efficiency are achieved, which is very important for good beam quality. This kind of pumping cavity is a perfect choice for high-energy laser system with high repetition.
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| Pumping distribution on the cross section of laser rod in a four-lamp pumped cavity | |
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| The laser cavity for Nd3+:YAG rod | Laser gain with and without glass filter (18mm Nd3+:YAG rod) |
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