Er:KYW crystals
Main features
- Strong absorption bandwidth near 1534 nm corresponding to InGaAsP/InP laser diode emission
- Wide emission bandwidth near 1600 nm
- Custom crystals available upon request
Application examples
- In-band pumped “eye-safe” CW, Q-switched, and mode-locked lasers
- In-band pumped “eye-safe” waveguide lasers
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- Description
- Properties
- Absorption and emission curves
Er3+:KYW are promising laser material for eye-safe emission at wavelength of 1609 nm, which can be resonantly diode-pumped into the upper laser manifold at 1534 nm. Due to low quantum defect high-slope efficiencies of >80% can be achieved with direct fiber laser or InGaAs/InP pumping. Because of broad and smooth emission in spectral range of 1570 - 1630 nm mode-locked “eye-safe” laser can be realized.
| Spectroscopic and thermo-mechanical properties | |
|---|---|
| Absorption peak wavelength | 1534 nm |
| Absorption cross-section at peak | 2,4 × 10-20 cm2 |
| Absorption bandwidth at a peak wavelength | 3 nm |
| Laser wavelength | 1609 nm |
| Lifetime of 4I13/2 erbium energy level | 3,1 ms |
| Emission cross-section @1609 nm | 0,4 × 10-20 cm2 |
| Refractive index | ng=2,05, nm=2,01, np=1,97 |
| Crystal structure | Monoclinic |
| Density | 6,5 g/cm3 |
| Mohs hardness | 4-5 |
| Thermal conductivity | ~3,5 Wm-1K-1 |
| Typical doping level | <20 at. % |
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