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  9. Hollow Core Photonic Crystal Fibers

Hollow Core Photonic Crystal Fibers

Hollow-core photonic bandgap fibers use a microstructured cladding region with air holes to guide light in a hollow core. The photonic bandgap guiding mechanism is fundamentally different from the traditional total internal reflection guiding principle. This new technology provides the basis for high-power delivery without non-linear effects or material damage.

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.

UNIQUE PROPERTIES

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.

REDUCED NON-LINEARITIES

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.

Their standard products cover three wavelength ranges around the wavelengths: 800 nm, 1060 nm, and 1550 nm.
Get in touch to discuss custom wavelengths.

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Hollow Core Photonic Crystal Fibers

Features
specifications
Document
Industries
Methods
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Features

  • > 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.

specifications

Optical
Model
HC-800
HC-1060
HC-1550
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
Physical Properties
Model
HC-800
HC-1060
HC-1550
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

1) Full 1/e2 width of the near field intensity distribution.

Manufacturers

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Document

Hollow core photonic Datasheet

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