Sapphire is a chemical and scratch resistant material with a melting point of 2,072°C. These LHPG grade sapphire fibers exist with diameters ranging from 75 to 500μm. Optical fibers with enlarged ends (tapered fibers) are also available.
These fibers are interesting because they offer a very good flexibility. Indeed, the flexibility of the fiber varies as the inverse 4th power of the diameter. For example, a 100μm fiber is 16 times more flexible than a 200μm fiber. The tapered fibers give the user high throughput capability without sacrificing their flexibility in both energy delivery and spectroscopy applications.
IDIL provides end fiber shapings, PTFE jackets and FC/PC connectors on request.
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|Single crystal optical fibers|
|Diameters & max. Length||305-500µm (50cm)|
|Damage threshold||1.3kJ/cm2 @ 3μm|
|Numerical aperture||0.45 (300μm fiber, 1m)|
|Attenuation||0.5-1.0dB in near IR (1m, 300μm)|
|Bending loss||3% for 3cm dia. loop (100μm fiber)|
Image: relative transmission of 1m long 125µm Sapphire fiber vs. input numerical aperture @ 633nm