Er,Yb:YAB (Erbium-Ytterbium Co-doped Yttrium Aluminum Borate) Crystal
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
-
- Commodity name: Er,Yb:YAB (Erbium-Ytterbium Co-doped Yttrium Aluminum Borate) Crystal
Er,Yb:YAB (Erbium- and ytterbium-codoped aluminum yttrium borate) crystal is a high-performance laser material with excellent overall characteristics. It is widely used in fiber optic communication systems as a key component in passive optical devices such as isolators, rotators, delay lines, and polarizers.
Product Introduction
Er,Yb:YAB (Erbium- and ytterbium-codoped aluminum yttrium borate) crystal is a high-performance laser material with excellent overall characteristics. It is widely used in fiber optic communication systems as a key component in passive optical devices such as isolators, rotators, delay lines, and polarizers.
Erbium- and ytterbium-codoped yttrium aluminum borate crystals (Er,Yb:YAB crystals) are a common alternative to Er/Yb-doped phosphate glasses, serving as a "human-eye-safe" active medium for lasers operating in the 1.5–1.6 μm wavelength range, delivering high average output power in both continuous-wave and pulsed modes.
Er,Yb:YAB is a laser crystal with outstanding overall performance, offering exceptional smoke-penetration capability at 1550 nm, high transparency in the atmosphere, and superior sensitivity when paired with room-temperature Ge and InGaAs photodiodes. As a result, it finds wide-ranging applications in fields such as LiDAR-based ranging, 3D imaging, and target recognition.
Er,Yb:YAB boasts high thermal conductivity, large absorption and emission cross sections, and a wide absorption bandwidth. It can be used in ultrashort pulse mode-locked lasers, LiDAR systems, and passively Q-switched lasers.
Key Advantages
- High Thermal Conductivity
- High Absorption and Emission Cross Sections
- A Uniaxial Crystal with a Triangular Structure
- A Broad Absorption Bandwidth Centered around 976 nm
- High Absorption and Emission Cross Sections
- Extremely High Yb 3+ To Er 3+ Energy Transfer EfficiencyApplication Areas
- Ultra-short pulse mode-locked lasers for telecommunications systems
- High-power, eye-safe (~1.5 μm) continuous-wave laser metrology
- High-repetition-rate passively Q-switched laser for LiDAR and LIBS systems
- For Laser RangefindersProduct Features
Basic Material Properties
Pump Wavelength
976 nm
Peak Absorption Cross Section
3 × 10 -20 cm² (σ-polarization)
Absorption Band Half-Width at Half maximum
19 nm
Laser Wavelength
1520–1600 nm
Fluorescence Lifetime
0.3 ms
Peak Emission Cross-Section
2×10 -20 cm² (σ-polarization)
Yb to Er Energy Transfer Efficiency
>90%
Refractive Index (@ 632.8 nm)
no=1.7757, ne=1.7015
Crystal Structure
Trigonal
Density
3.7 g/cm³
Mohs Hardness
7.5 Mohs
Thermal Conductivity
4.7 W/m/K
Thermal Expansion Coefficient
⊥c: 2.0×10-6K-1 //c: 9.7×10-6K-1(25 at.% Yb3+ )
⊥c:1.2×10-6K-1//c:8.5×10-6K-1(10 at.% Yb3+ )
Typical Doping Standards
1-2 at.% [Er]
8-15 at.% [Yb]
Product Processing Indicators
Oritentation
c-cut
Doping Concentration
He 3+:0.1~3 at.%, Yb3+:5~30 at.%
Effective Aperture
>90%
Cross-Section
(1×1) to (15×15) mm 2
Thickness
0.5–10 mm
Chamfer
≤0.2×45°
Surface Quality
10-5 S-D
Flatness
≤λ/6@633 nm
Wavefront Distortion
≤λ/8@633 nm
Parallelism
30"
Perpendicularity
≤15′
Coating
AR or HR Coating
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- Excellent thermal conductivity
- Multiple possible pump wavelengths (typically 532 nm)
- Broad-wavelength tunability
- Broadly Absorbing Pump Band
- Outstanding output efficiency
- Short-lived excited state (3.2 μm)
- Narrow mode-locking width
- High damage threshold -
- Mode-locked laser with ultrashort pulses
- Multi-channel Amplifiers and Regenerative Amplifiers
- The tunable wavelength range allows Ti:Sapphire lasers to replace dye lasers in many applications.
- By using ultra-thin, non-critically phase-matched crystals like BBO as frequency-doubling devices, Ti:Sapphire lasers can generate ultrashort pulses as short as below 10 fs, producing light in the ultraviolet to deep-ultraviolet range—down to as low as 193 nm.
-Ti:Sapphire is also widely used as a pump source for optical parametric oscillators to broaden their tuning range. -
Basic Material Properties Molecular formula Ti³⁺:Al₂O₃ Crystal structure Hexagonal crystal system Lattice constant a = 4.758 Å, c = 12.991 Å Density 3.98g/cm3 Melting point 2040°C Mohs Hardness 9Mohs Thermal conductivity 52W/m/k Specific heat 0.42J/g/K Laser generation Four-level system Fluorescence lifetime 3.2 μs (T = 300 K) Tuning range 660-1050nm Absorption range 400-600nm Emission peak 795nm Absorption peak 488nm Refractive index 1.76 @ 800 nm Peak cross-section 3–4 × 10⁻¹⁹ cm² Coefficient of thermal expansion 8.40 × 10⁻⁶/°C Product Processing Metrics Directional The C-axis is the optical axis direction, which is perpendicular to the crystal surface. Ti2O3 concentration 0.06–0.26 at.% Quality factor 100–300 units Effective Aperture >90% Surface Dimension Tolerance 0 / -0.1 mm Thickness Tolerance ±0.1 mm Protective Chamfer ≤0.2 × 45° End face Double parallel planes or Brewster-cut ends Surface finish 10-5 S-D Flatness ≤λ/8 @ 633 nm Transmitted Wavefront Distortion ≤λ/4 @ 633 nm Parallelism 30" Verticality ≤15′ Custom film system services available
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