| Applications | ◆Nd:YAG can produce blue laser with the frequency-doubling of 946nm | |||
| ◆Nd:YAG can be operated in a very high power laser up to kw level | ||||
| ◆Nd:YAG can be Q-switched with Cr4+YAG directly | ||||
| ◆Due to the cubic symmetry and high quality, Nd:YAG is easy to operate with TEM00 mode | ||||
| Features | ◇Its laser parameters are a good compromise between the strengths and weaknesses of its competition. | |||
| ◇Compared with others laser crystals, its fluorescence lifetime is twice more than Nd:YVO4, and thermal conductivity is also better. | ||||
| Main Specification | Nd dopant concentration Dopant tolerance |
0.3~2.0(±0.1)atm% | ||
| Diameter | 3 ~ 14mm | |||
| Length | 1~ 160mm | |||
| Coating | HR-Coating: R>99.8%@1064nm and R<5%@808nm AR-Coating (Single layer MgF2): R<0.25% per surface (@1064nm) Other HR coating or wavelengths are also available |
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| Orientation | <111> crystalline direction (+/-5℃) | |||
| Wavefront Distortion | <λ/10 per inch at 632.8nm for 3 ~7mm >λ/10 per inch at 632.8nm for >=7mm |
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| Surface quality Scratch/Dig | < 20/10 Scratch/Dig per MIL-O-1380A | |||
| Parallelism | < 10 arc sec | |||
| Perpendicularity | < 5 arc min | |||
| Surface flatness | <λ/10 at 632.8nm | |||
| Clear aperture | Central 95% | |||
| Chamfer | 0.15x45° | |||
| Damage Threshold | >500MW/cm2 | |||
| Physical and Chemical Properties | Chemical Formula | Nd:Y3A15O12 | ||
| Lattice Constants | 12.01Å | |||
| Dimensional tolerances | +0/-0.05 mm, Length ±0.1 mm | |||
| Concentration | ~ 1.2 x 1020 cm-3 | |||
| Melting Point | 1970°C (2240K) | |||
| Density | 4.56 g/cm3 | |||
| Mohs Hardness | 8.5 | |||
| Refractive Index | 1.82 | |||
| Thermal Expansion Coefficient | 7.8 x 10-6 /K [111], 0 - 250 °C | |||
| Thermal Conductivity | 14 W/m /K @20 °C, 10.5 W /m /K @100 °C | |||
| Optical properties | Lasing Wavelength | 1064 nm | ||
| Extinction Ratio | >28 dB | |||
| Stimulated Emission Cross Section | 2.8×10-19 cm-2 | |||
| Relaxation Time of Terminal Lasing Level | 30 ns | |||
| Radiative Lifetime | 550 ms | |||
| Spontaneous Fluorescence | 230 ms | |||
| Loss Coefficient | 0.003 cm-1 @ 1064 nm | |||
| Effective Emission Cross Section | 2.8 x 10-19 cm2 | |||
| Pump Wavelength | 807.5 nm | |||
| Absorption band at pump wavelength | 1 nm | |||
| Linewidth | 0.6 nm | |||
| Polarized Laser Emission | Unpolarized | |||
| Thermal Birefringence | High | |||
