a The AlF3-based fibers are multi-component fluoride glass fibers with main component of AlF3. They are superior for laser damage thresholds and water resistance compared to ZBLAN fluoride fibers and have smaller transmission loss than that of GeO2 fibers at 2.9μm. They have already been used around the worlds as optical guides for 2.94 μm Er-YAG laser treatment equipments. In addition, they are also used as an optical guide for mid-infrared spectroscopy because of the wide transparent window from 0.3 to 3.5 μm.
| ■ Features
AlF3-based Fluoride Glass Fiber ■ Applications MIR Laser Delivery (Er:YAG, Er:YSGG) |
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■ Specifications
| Items | AMF-440/480 | AMF-200/240 |
| Fiber Type | Step Index Type Multimode Fiber | |
| Core Diameter [µm] | 440+/-20 | 200+/-10 |
| Cladding Diameter [µm] | 480+/-10 | 240+/-10 |
| Coating Diameter [µm] | 600±30 | 450±30 |
| Numerical Aperture | 0.22+/-0.02 | |
| Loss @l=2.94 µm [dB/m] | < 0.1 | |
| Core/Cladding Glass Material | AlF3-based Fluoride Glass | |
| Coating Material | UV-curable Acrylate | |
| Proof Test | 6cm Radius | 3cm Radius |
Glass properties
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Optical
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Transmission range | 0.35 ~ 3.5µm |
| Refractive index (nd) | 1.46 | |
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Thermal
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Glass transition temperature (Tg) | 367 ºC |
| Thermal expansion (a) | 186×10-7 /ºC | |
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Chemical
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Water solubility (Dw) | 0.27 wt% |
| Acid solubility (Da) | 0.69 wt%* | |
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Physical
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Density | 3.97 g/cm3 |
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Mechanical
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Young’s modulus (E) | 66 GPa |
| Knoop hardness (HK) | 3.1 GPa |
