Er:Yb:Glass is a co-doped phosphate-based laser glass designed for applications requiring efficient laser operation at a wavelength of 1535 nm. The material combines the properties of Erbium (Er³⁺) and Ytterbium (Yb³⁺) ions to achieve a strong pump absorption and efficient energy transfer. Er:Yb:Glass is widely used in fiber optic communications, range finding, and other laser-based applications due to its high thermal and chemical durability.
The presence of Yb³⁺ ions facilitates energy transfer to Er³⁺, improving pump utilization efficiency and enabling compact and reliable laser systems. The material also offers excellent optical properties such as low scattering losses and minimal thermal distortion.
General Applications and Examples
Er:Yb:Glass is highly versatile and finds applications in diverse fields:
| Parameter | Unit | Er,Yb:Glass | Er,Yb,Cr:Glass |
|---|---|---|---|
| Transition Temperature | °C | 566 | 455 |
| Softening Temperature | °C | 605 | 493 |
| Linear Thermal Expansion | 10^-7/°C | 87 | 103 |
| Thermal Conductivity | W/m·K | 0.7 | 0.7 |
| Chemical Durability | μg/hr·cm² | 52 | 103 |
| Density | g/cm³ | 3.06 | 3.1 |
| Laser Wavelength Peak | nm | 1535 | 1535 |
| Emission Cross Section | 10^-20 cm² | 0.8 | 0.8 |
| Fluorescence Lifetime | ms | 7.7-8.0 | 7.7-8.0 |
| Refractive Index @ 1535nm | – | 1.532 | 1.539 |
| Thermal Optical Coefficient | 10^-6/°C | -1.72 | -5.2 |
| Parameter | Value |
|---|---|
| Peak Emission Wavelength | 1535 nm |
| Absorption Cross Section | 0.8 × 10^-20 cm² |
| Fluorescence Lifetime | 7.7–8.0 ms |
| Refractive Index @ 1535nm | 1.532 |
| Thermal Expansion Coefficient | 87 × 10^-7/°C |
| Parameter | Specification |
|---|---|
| Diameter Tolerance | ± 0.05 mm |
| Length Tolerance | ± 0.5 mm |
| Surface Quality (Scratch/Dig) | 10-5 |
| Flatness | λ/8 @ 632 nm |
| Wavefront Distortion | λ/10 @ 632 nm |
| Parallelism | <10 arc seconds |
| Perpendicularity | <5 arc minutes |
Detailed spectrum transmission data is available upon request. The material demonstrates strong absorption in the pump wavelength range of 1535 nm and low losses across the operational spectrum.
Custom anti-reflective (AR) coatings can be applied for specific wavelength ranges, including AR coatings optimized for 1535 nm
| Dimensions | Length | Doping Concentration | Coating | Price (USD) |
|---|---|---|---|---|
| 3 x 3 mm | 6 mm | Standard | Uncoated | 500 |
| 3 x 3 mm | 10 mm | Customized | AR @ 1535 nm | 700 |
| Custom | Custom | Customized | Upon request | Upon request |
