Yb:KGW - Ytterbium Doped Potassium Gadolinum Tungstate
Ytterbium-doped Potassium Gadolinum Tungstate (Yb:KGW) is an exceptional laser material known for its high efficiency and performance. It offers several advantages over traditional Nd3+ doped materials, particularly for short-pulse lasers.

Key features and benefits:

• Wide Absorption Spectrum at 980 nm: High absorption of pump radiation allows efficient diode laser pumping, ensuring optimal performance.
• Broad Spectral Emission from 1023-1060 nm: Ideal for generating short pulses (ps or fs) in laser systems, providing flexibility for various applications.
• High Absorption Coefficient: Yb:KGW's strong absorption at 981 nm ensures high efficiency in laser systems, making it a superior choice for high-powered laser setups.
• Low Laser Threshold and Quantum Defect: Reduced threshold and minimal energy loss lead to efficient operation, enhancing the overall system efficiency.
• High Yb Doping Concentration: The high doping concentration of Yb enables enhanced lasing performance, making it a robust solution for demanding applications.
• Excellent Polarized Output: Offers a broad, polarized output at 1023–1060 nm, ideal for specialized laser systems.
• High Slope Efficiency: The crystal supports high slope efficiency with diode pumping, increasing the overall power output for industrial applications.

Material and Structural Characteristics:

• Crystal Structure: Monoclinic, Point Group C2/c
• Melting Point: 1075°C
• Mohs Hardness: 5
• Density: 7.27 g/cm³
• Thermal Conductivity: Excellent with varying conductivity along different crystal axes (K[100] = 2.6 W/m/K, K[010] = 3.8 W/m/K).
• Thermal Expansion Coefficients: Low expansion with α[100] = 4×10?? /K, ensuring stability during operation.

Applications: Yb:KGW is ideal for various laser technologies, including:

• Diode-pumped lasers
• Short-pulse laser systems
• High-precision laser applications in scientific research
• Industrial lasers for cutting, engraving, and material processing

Specifications:

• Orientation: [010]
• Standard Dopant Concentration: 5 at.%
• Maximum Length: 50 mm
• Dimensional Tolerances: Diameter: ±0.1 mm, Length: ±0.5 mm
• Surface Quality: 20/10 to MIL-PRF-13830B
• Flatness: λ/6 @633 nm
• Parallelism: 20 arc sec
• Perpendicularity: ≤15 arc min
• Coating: AR-1030/980 nm (R < 0.2% @1030 nm, R < 0.5% @980 nm), with custom coatings available.

Yb:KGW's unique properties make it a top choice for advanced laser systems, ensuring superior performance in applications requiring high efficiency and short-pulse generation.