Aluminum Coated Silica Fibers

Main features:

  • Operating up to 400°C
  • Impressive mechanical strength and flexibility
  • No outgassing in high vacuum environments
  • Solderable for connector integration (epoxy-free choice)
  • Efficient heat dissipation with metal coating
  • Compatible with sterilization methods: Steaming, ETO, steam, e-beam, or gamma.
Al Fiber II transparent product page 1
Al Fiber II transparent product page 2

MIR Photonics’ Aluminum Coated Silica Fibers stand as the premier choice for applications requiring resilience in high-temperature, vacuum, and extreme environmental conditions.

These Al-coated fibers retain all the advantages of standard silica-silica fibers. Additionally, they offer enhanced mechanical strength and improved fatigue resistance, surpassing that of fibers coated with polymers.

They boast a broad transmission range of 220 to 2400 nm, varying with the selection of either UV or NIR silica fiber cores. Remarkably, they function efficiently in a wide temperature range from -270°C to 400°C and can withstand humidity levels up to 100%.

Specification of standard Al-coated fibers
Core/ Cladding material Step IndexPure Fused Silica Core / Fluorine Doped Silica Cladding
Graded IndexGermanium Doped Fused Silica Core / Pure Fused Silica
Fiber core diameters, μm9; 50; 62.5; 100; 200; 400; 600
Al coating thickness, μm15 – 150 (depending on fiber diameter)
Standard Numerical Aperture (NA)0.22 ± 0.02
Available Numerical Aperture (NA)0.12 ± 0.02 | 0.26 ± 0.02
Min operating temperature, °C-270
Max operating temperature, °C400
Humidity RangeUp to 100%
Minimal bending radius (long term)200 x fiber outer diameter
Minimal bending radius (short term)100 x fiber outer diameter
Tensile strength (short gauge), GPa3.5 – 6
Two point bending strength, GPa>10
Static fatigue parameter>100
Parameters of standard Al-coated fibers
CodeTypeCore, μmCladding, μmCoating AI, μmNA
100/110 AlStep Index Multimode100 ± 2110 ± 2.2140 ± 70.22
200/220 AlStep Index Multimode200 ± 4220 ± 4.4300 ± 150.22
400/440 AlStep Index Multimode400 ± 8440 ± 8.8560 ± 280.22
600/660 AlStep Index Multimode600 ± 12660 ± 13.2825 ± 41.250.22
50/125 AlGraded Index Multimode50 ± 1125 ± 2.5165 ± 3.30.22
9/125 AlStep Index Single Mode9 ± 0.45125 ± 6.25160 ± 3.20.13

High temperature environment

Harsh Chemical environment

Nuclear radiation resistant devices

Down-hole sensing for oil and gas industry

High Power Laser delivery

Medical applications