Er Yb Glass Crystal for Eye-Safe 1535nm Laser Applications

Specifications

Type Of Crystal: Er Glass
AR Coating: Uncoated, Both sides, One side
Dimension Tolerance Width: (+/-0.1) mm
Coatings AR @940 Nm: R<0.5%
Coatings AR @1535 Nm: R<0.2%
Clear Aperture: ≥90%
Wavefront Distortion: <λ/2 per inch
Chips: <0.1 mm
Flatness: λ/10
Chamfer: <0.1 mm x 45°
Parallelism: ≤30″
Perpendicularity: ≤10′
Scratch/Dig: 10/5
Dimension Tolerance Length: (+1/-0.5) mm
Dimension Tolerance Height: (+/-0.1) mm
Absorption Peak Wavelength: 970 nm
Typical Doping Level [Yb]: 1.7-4×10^21 cm^-3
Typical Doping Level [Er]: 0.3-1.3×10^20 cm^-3
Thermal Expansion Coefficient: 12.4×10^-6 K^-1
Dn/dT: -2.1×10^-6 K^-1
Thermal Conductivity: 0.85 Wm^-1K^-1
Mohs Hardness: 6-7
Density: 2.93 g/cm^3
Refractive Index @1534 Nm: 1.52
Yb To Er Energy Transfer Efficiency: >90%
Emission Cross-section @1535 Nm: 8×10^-21 cm^2
Laser Wavelength: 1535 nm
Absorption Bandwidth At Peak Wavelength: 20 nm
Absorption Cross-section At Peak Wavelength: 1.7×10^-20 cm^2
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Features


  • Eye-Safe Wavelength: The Er,Yb:Glass crystal generates a laser at 1535 nm, ensuring safety for eye exposure, making it ideal for laser rangefinding and telecommunication applications.

  • Wide Absorption Band: Offers a broad absorption spectrum, enhancing its versatility in various applications.

  • Long Fluorescence Lifetime: Provides extended operational time, increasing efficiency and performance in laser systems.

  • High Slope Efficiency: Ensures optimal energy conversion, leading to effective laser operation.

  • Unique Bonding Technology: CRYSTECH's proprietary technique allows for the creation of miniature lasers by bonding Er,Yb:Glass with Cobalt Spinel, enabling the production of very small bonded crystals.

  • High Yb to Er Energy Transfer Efficiency: Achieves over 90% efficiency in energy transfer from Ytterbium to Erbium, enhancing laser performance.

  • Robust Physical Properties: Features a Mohs hardness of 6-7 and a density of 2.93 g/cm3, providing durability and stability.

  • Precision Specifications: Includes dimension tolerances, scratch/dig quality, perpendicularity, parallelism, chamfer, flatness, wavefront distortion, and clear aperture specifications to ensure high-quality performance.

  • Advanced Coatings: Anti-reflective coatings with R<0.2% at 1535 nm and R<0.5% at 940 nm on both faces to minimize reflection losses.

Applications


  • Laser range finding

  • Lidar

  • Target designation