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When looking for a silica core and silica clad fiber with a hard polymer coating that allows a high core-to-clad ratio and a numerical aperture (N.A.) of 0.22 for efficient light coupling, the Anhydroguide™ AFSH is the fiber of choice. The Anhydroguide™ fiber is drawn from preforms manufactured by the Plasma Outside Deposition (POD) process. Rods of extremely pure synthetic fused silica are coated with fluorine doped silica layers to obtain preforms with step-like refractive index profiles. Plasma torches prepare the reaction compounds from SiCI4, O2, and fluorine containing gas. Strong thermal gradients combined with the temperature plasma lead to chemical deposition conditions, which allow very high fluorine concentrations to be incorporated in the fused silica network. Refractive index differences of 0.27 corresponding to numerical apertures in excess of 0.28 have been realized with undoped core rods.

FEATURES

• Stability of silica cladding allows high power and high temperature handling capability relative to hard cladding or plastic cladding.

• Low index, fluorine-doped cladding provides superior visible to infrared (VIS-IR) transmission as compared to plastic clad fiber and borosilica clad fiber designs.

• High concentricity and core-to-clad ratio.

• Hard polymer coating provides for a high strength fiber and reduced static fatigue, as well as protection for the fiber during buffer stripping.

• Strong bonding of the hard polymer to silica prevents relative movement of these materials in the fiber structure as the ambient temperature changes. This movement is sometimes referred to as "pistoning" and it can cause serious problems at connectors and other types of fiber terminations if not properly dealt with.

• These fibers provide excellent transmission in visible to infrared wavelengths.

• Excellent for high power laser transmission and spectroscopy.

• OH content of core material less than 0.7ppm, typical 0.15.

• The core, clad and buffer materials have been certified to USP Class VI for non-toxicity and biocompatibility.

• Optical fibers and assemblies can be sterilized by ETO, e-beam, and gamma radiation.

• Radiation resistant.

• All dielectric, non-magnetic construction.

• Excellent for Holmium (2100nm) and Erbium (1540nm) laser delivery.

• Laser damage resistant construction transmits 1.3kW/mm2 CW at 1060nm; up to 10 Joules, pulsed (Special end preparation may be required).

• Good choice for a broad range of applications from the visible (VIS) to infrared (IR).

APPLICATIONS

High Power Laser

Delivery Systems

• Medical

• Photodynamic therapy

• Laser welding/soldering

Remote Spectroscopy

Laser Ordnance Initiation

Analytical Instrumentation

Optical Pyrometry

Industrial/Scientific

• Sensors

• Laser diode pigtailing

• Remote illumination

• Diagnostics

Nuclear Plasma Diagnostics

Semiconductor Manufacturing