Er Yb Co-doped Phosphate Glass
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Ships from:
China
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On FindLight:
since 2019
Description
The Crylink Er,Yb:Glass is an advanced Er³⁺/Yb³⁺ co-doped phosphate glass designed for high-performance, eye-safe laser applications at 1535–1540 nm. Leveraging the synergistic interaction between Erbium and Ytterbium ions, this glass offers efficient optical pumping via Yb³⁺ absorption at the 2F₇/₂ → 2F₅/₂ transition, followed by rapid energy transfer to the Er³⁺ ⁴I₁₁/₂ level. This process enables strong emission from the ⁴I₁₃/₂ → ⁴I₁₅/₂ transition without requiring additional components.
With its wide absorption band, long fluorescence lifetime, and high slope efficiency, Crylink Er,Yb:Glass is ideal for compact, cost-effective, and reliable solid-state laser systems. It is particularly suited for laser rangefinders, target recognition systems, Er glass fiber amplifiers, and telecommunication applications, benefiting from its position in the eye-safe and fiber-optic communication window.
Two grades—EAT14 (optimized for high repetition rate LD-pumped lasers) and WM4 (for ion-exchange applications)—are available, each offering excellent thermal stability, high optical quality, and robust polishing specifications. When paired with passive Q-switch crystals such as Co:spinel, it delivers precise, pulsed 1540 nm output for demanding defense, industrial, and scientific applications.
Er Yb Co-doped Phosphate Glass
Specifications |
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|---|---|
| Type Of Crystal: | TeO2 |
| Crystal Diameter: | 10 mm |
| Crystal Length: | 8.2 mm |
| AR Coating: | One side |
| Cross Section For Stimulated Emission: | 0.8 (10-20cm2) |
| Fluorescent Lifetime: | 7.7-8.0 (ms) |
| Center Lasing Wavelength: | 1535 (nm) |
| Refractive Index (1535nm): | 1.524 |
| Transformation Temp: | 556 (℃) |
| Coeff.of Linear Thermal Expansion: | 87 (10-7/K) (20~100℃) |
| Thermal Conductivity: | 0.7 (25℃) (W/mK) |
Features
- Eye-Safe Wavelength: The Er,Yb co-doped phosphate glass emits laser radiation at 1540nm, making it safe for eye exposure and ideal for applications like laser ranging and telecommunications.
- Efficient Energy Transfer: Utilizes Yb3+ ions for energy absorption and transfer, leading to efficient excitation of Er3+ ions, which then emit the desired fluorescence.
- Compact and Cost-Effective: The design of the laser is compact and low-cost, suitable for various industrial applications.
- High Repetition Rate: The EAT14 glass variant supports high repetition rates (1-6Hz) for laser diode pumped 1535nm lasers.
- Wide Absorption Band: Offers a broad absorption band, enhancing its utility in diverse laser applications.
- Long Fluorescence Lifetime: Ensures sustained laser performance with a longer fluorescence lifetime.
- High Optical Quality: The glass exhibits superior optical quality, crucial for precision applications.
- High Slope Efficiency: Demonstrates high slope efficiency, improving overall laser performance.
Applications
- 1535nm Eye-Safe Laser: Utilized for applications requiring eye safety, such as laser ranging and telecommunication.
- Er Glass Fiber Amplifier: Enhances signal strength in fiber optic communications.
- Range Finder: Used in devices for measuring distance by calculating the time taken for a laser beam to reflect back from a target.
- Target Recognition: Employed in systems designed to identify and track targets, beneficial in defense and security applications.
Frequently Asked Questions
Yes, the Er,Yb:glass laser is eye-safe as it emits radiation at the wavelength of 1540 nm, which is within the eye-safe range.
The applications of the Er,Yb:glass laser include laser ranging finder, telecommunication communication, radar, target recognition, and Er glass fiber amplifier.
The transformation temperature of EAT14 glass is 556 ¥ and that of WM4 glass is 530 ¥. The softening temperature of EAT14 glass is 605 ¥ and that of WM4 glass is 573 ¥. The coefficient of linear thermal expansion of EAT14 glass is 2.9 x 10-7/K and that of WM4 glass is 1.4 x 10-7/K.
The most efficient energy transfer process for the Er,Yb:glass laser is from Yb3+ ions under absorption from the 2F7/2 → 2F5/2 transition, followed by energy transfer to the 4I11/2 Er3+ level and fast nonradiative transition to the Er3+ 4I13/2 level which emits the expected fluorescence.
The radiation output wavelength of the Er,Yb:glass laser is 1540 nm.