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Description

The Er,Yb:Glass Crystal is a sophisticated active gain medium known for its ability to generate a 1535 nm laser, which is an eye-safe wavelength. This characteristic makes it highly favorable for applications in laser rangefinding and telecommunication. The unique combination of Erbium (Er3+) and Ytterbium (Yb3+) co-doped phosphate glass ensures that it meets the stringent requirements of modern optical technologies. One of the standout features of the Er,Yb:Glass Crystal is its capability to be used in conjunction with Cobalt Spinel to create a passive Q-switched laser. This combination is capable of generating short laser pulses of less than 10 nanoseconds at the 1535 nm wavelength. Such precision and efficiency open up possibilities for engineers and developers to innovate in the field of miniature lasers, thanks to CRYSTECH's advanced bonding technology. This proprietary technique allows for the production of very small bonded crystals, further enhancing the versatility of the Er,Yb:Glass Crystal in compact laser systems. CRYSTECH's Er,Yb:Glass Crystal is a testament to cutting-edge research and development in optical materials. With a wide absorption band, long fluorescence lifetime, and high slope efficiency, it is designed to meet the demands of high-performance laser applications. The crystal's precise engineering and robust physical properties ensure that it remains a reliable component in various optical systems.

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

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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

Frequently Asked Questions

What is Er,Yb:Glass?
Er,Yb:Glass is an active gain medium that generates a 1535 nm laser, which is an eye-safe wavelength. It is used in applications such as laser rangefinding and telecommunications.
What applications can Er,Yb:Glass be used for?
Er,Yb:Glass can be used for laser rangefinding, lidar, and target designation.
How does the bonding technology benefit Er,Yb:Glass?
CRYSTECH's unique bonding technology allows Er,Yb:Glass to be bonded with Cobalt Spinel to create very small bonded crystals, enabling the development of miniature lasers.
What are the physical properties of Er,Yb:Glass?
Er,Yb:Glass has a refractive index of 1.52 at 1534 nm, a density of 2.93 g/cm³, a Mohs hardness of 6-7, thermal conductivity of 0.85 Wm⁻¹K⁻¹, and a thermal expansion coefficient of 12.4×10⁻⁶ K⁻¹.
What are the key features of Er,Yb:Glass?
Key features include an eye-safe wavelength, wide absorption band, long fluorescence lifetime, and high slope efficiency.
What is the typical doping level for Er and Yb in the glass?
The typical doping level is 0.3-1.3×10²⁰ cm⁻³ for Er and 1.7-4×10²¹ cm⁻³ for Yb.
What specifications does Er,Yb:Glass meet?
Er,Yb:Glass meets specifications such as dimension tolerance, scratch/dig of 10/5, perpendicularity of ≤10′, parallelism of ≤30″, chamfer

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