Ho: YLF
The tunable mid-infrared light source can be realized by using Ho: YLF and other laser crystals as gain medium with a wavelength of 2000nm. Because this light source can quickly identify volatiles in molecular fingerprint regions, it plays an important role in military applications, high string wave generation and strong field physics research. Atmospheric remote sensing technology including Doppler lidar has also been widely used in 2000nm solid state lasers. Moreover, the absorption and emission interfaces of ho ion-doped gain media have a strong temperature dependence, which enables the development of low-temperature cooled Ho:YLF single-pass amplifiers. This makes Ho:YLF Crystal have a promising prospect.
Ho:YLF Crystal —— Intense ultrafast sources in the mid-IR with a wavelength of 2,000 nm can be used for military and physical research.
The medium infrared extremely fast source with the working wavelength of 2000nm can make clean self-compression to the less peripheral region by using nonlinear optics. These sources can quickly identify volatiles in the molecular fingerprint region and play the role of rapid scanning.
Parameter
| Orientation | a-cut |
| Parallelism error | <10 arcsec |
| Perpendicularity error | <10 arcmin |
| Clear aperture | >90% |
| Protective chamfers | <0,1 mm at 45′ |
| Surface quality | 10-5 S-D |
| Surface flatness | < /10@632,8 nm |
| Face dimensions tolerance | +0/-0,1 mm |
| Coatings | R<0,35%@1900-2100nm on both faces |
| LIDT | >10 J/cm2@2060 nm, 10 ns |
| Crystal structure | tetragonal |
| Density | 3.95 g/cm3 |
| Mohs hardness | 5 |
| Thermal conductivity | 6 Wm-1K-1 |
| Typical doping level | Typical doping level |
| dn/dT | 4.6 10-6 (||c) K-1,-6.6 10-6 (||a) K-1 |
| Thermal expansion coefficient | 10.1 10-6 (||c) K-1,14.3 10-6 ((||a) K-1 |
| Absorption peak wavelength | 1940 nm |
| Absorption cross section at peak | 1.2 10-20 cm2 |
| Absorption bandwidth at peak wavelength | ~18 nm |
| Laser wavelength | 2060 nm |
| Lifetime of 5I7 energy level | 10 ms |
| Emission cross-section | 1.8 10-20 cm2 |
| Refractive index@1064 nm | no=1.448, ne=1.470 |
Ho:YLF crystal case (1)
Dimension: φ3×30 mm;
Coating: AR/AR@1900-2100 nm on both faces;
Damage threshold: ˃10J/cm2@2050 nm, 10ns
- High laser horizontal life
- High emission cross section
- Natural birefringent materials
- DN /dT value is low → weak thermal lens
- The absorption and emission interfaces have strong temperature dependence.
- 2000nm lasers are used for military applications
- 2000nm lasers are used for physical research
- 2000nm lasers are used for physical research
Ho:YLF crystals crylink have supplied
Size: Φ3 x 30 mm
Coating: AR/AR@1900-2100nm
Damage threshold: >10J/cm2@2050nm,10ns
Size: Φ3 x 30 mm
Coating: AR/AR@1900-2100nm
Damage threshold: >10J/cm2@2050nm,10ns
Size: Φ3 x 30 mm
Coating: AR/AR@1900-2100nm
Damage threshold: >10J/cm2@2050nm,10ns
