CRYLINK’s erbium, ytterbium co-doped aluminum borate yttrium crystal products, also known as Er,Yb:YAB. It is a kind of laser glass product with excellent comprehensive performance. It is widely used in telecommunication system, radar monitoring and laser field. The product is characterized by high thermal conductivity, high absorption and emission cross sections, and wide absorption bandwidth. It can be used in ultra-short mode-locked lasers, laser radar, passive Q-switched lasers, eye safety (1.5-1.6 μm) laser products.
Product Parameters
Absorption peak wavelength | 976 nm |
Absorption cross-section at peak wavelength | 2.7×10-20 cm2 |
Absorption Bandwidth at peak wavelength | 17 nm |
Laser wavelength | 1522, 1531, 1543, 1550, 1602 nm |
Lifetime of 4I13/2 erbium energy level | 0.32 ms |
Emission [email protected] nm | 2.5×10-20 cm2 |
Yb to Er energy transfer efficiency | >90 % |
Refractive [email protected] nm | no=1.7757, ne=1.7015 |
Crystal structure | Trigonal |
Density | 3.84 g/cm3 |
Mohs hardness | 7.5 |
Thermal conductivity | 7.7 (//a), 6 (//c) Wm-1K-1 |
dn/dT | 1.4×10-6 (//a), 4.8×10-6 (//c) K-1 |
Thermal expansion coefficient | 2×10-6 (//a), 9.5×10-6 (//c) K-1 |
Typical doping level | 1-2 at.% [Er] 8-15 at.% [Yb] |
Er, Yb:YAB Crystal | |
Orientation | c-cut |
Clear aperture | >90% |
Face dimensions tolerance | +0,0/-0,1 mm |
Length tolerance | ±0,1 mm |
Parallelism error | <10 arcsec |
Perpendicularity error | <10 arcmin |
Protective chamfers | <0,15 mm at 45˚ |
Surface quality | 10-5 S-D |
Surface flatness | <λ/[email protected],8 nm |
Coatings | [email protected](R<1%) @940 nm + AR(R<0,25%) @1480-1600 nm |
Laser-induced damage threshold | >10 J/cm2@1550 nm, 10 ns |
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Er, Yb: YAB absorption emission (π) | Er, Yb: YAB absorption emission (σ) |
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Er, Yb: YAB absorption curve |
- High thermal conductivity
- Wide absorption bandwidth near 976 nm
- High absorption and emission cross-sections
- A uniaxial crystal having a triangular structure
- Extremely high energy transfer efficiency from Yb3+ to Er3+
- Ultra-short mode-locked lasers for telecommunication systems
- High power eye safe (~ 1.5 μm) continuous wave laser metering
- High repeat frequency passively adjusted Q laser for lidar and LIBS systems