As more than 98% of the mode is confined in air, the fibers are also very radiation insensitive making them suitable for radiation hard environments.
Hollow-core fibers enable a large variety of applications
In hollow-core photonic bandgap fibers, a microstructured silica cladding with air holes confines the light inside a hollow core. They enable a large variety of applications which require performances that can not be met using traditional solid-core fibers.
Hollow-core fibers are ideal for narrow linewidth delivery, power delivery, pulse shaping and compression, nonlinear optics, gas spectroscopy, fiber optic gyroscopes, and sensors.
The hollow core allows control of the gas composition and pressure, enabling extremely long interaction lengths between the light and the gas.
The weak interaction between the fundamental mode and the surrounding silica also makes these fibers radiation insensitive.
Since only a small fraction of the light propagates in silica, the effect of material non-linearities is significantly reduced compared to solid core fibers.
Our standard products cover three wavelength ranges around the wavelengths: 800 nm, 1060 nm, and 1550 nm.
Get in touch to discuss custom wavelengths.
- > 98% of the optical power is located in the hollow core
- Can be gas or particle-filled
- Ultra-low bend loss
- Low Fresnel reflections at end faces
- Group index close to unity
- Radiation insensitive
- Pure silica material
- High threshold power for non-linear effects
- Extreme dispersion values for pulse compression/dispersion compensation
These fibers are almost entirely bend-insensitive. They can be bent down to a bend diameter <1 cm without any change in the optical transmission.
|Center wavelength||820 nm||1060 nm||1550 nm|
|Operating wavelength loss threshold||250 dB/km||100 dB/km||30 dB/km|
|Operating wavelengths||780-860 nm||1030-1090 nm||1490-1680 nm|
|Mode field diameter at design wavelength 1)||5.5 ± 2 µm||6.7 µm ± 1 µm||9.0 ± 1 µm|
1) Full 1/e2 width of the near field intensity distribution.
|Core diameter||7.5 ± 1.5 µm||9.0 ± 1.5 µm||11.5 ± 1.5 µm|
|Cladding diameter||130 ± 5 µm||120 ± 5 µm||120 ± 2 µm|
|Coating diameter (single-layer acrylate)||220 ± 50 µm||240 ± 40 µm||220 ± 30 µm|