Hollow Core Photonic Bandgap Fiber, 440nm

Hollow core photonic bandgap fibers guide light in a hollow core surrounded by a microstructured cladding formed by a periodic arrangement of air holes in silica.

Since only a small fraction of light propagates in glass, the effect of material nonlinearities is significantly reduced.

Applications include power delivery, pulse shaping and compression, sensors and non-linear optics.

・>95% of optical power located in air
・Gaussian-like fundamental mode
・Can be filled with gas
・Low bend loss down to few mm bend radius
・Fresnel reflection to air at the end faces <10e-4
・Undoped silica for good temperature stability