Features and Benefits

•   High numerical aperture (0.29)
•   Large core diameter for efficient high-power transmission from high NA sources
•   Choice of coatings: Hard Clad Silica (*HCS) or PYROCOAT
•   High strength
•   With PYROCOAT coating, resistant to chemicals and high temperatures
•   High germanium, low OH content results in extremely low, flat spectral attenuation curve
•   With *HCS coating, cladding modes are preserved through bends, distributing lost power over a greater area and lowering the probability of “hot spots”
•   Handles peak power delivery approaching 1GW/cm2
•   USP Class VI nontoxic and biocompatible
•   Sterilizable

 

Typical Applications

•   Near-IR spectroscopy
•   High-power laser delivery
•   Sensing

The Ultrasil family of high NA low OH- silica-silica fiber efficiently handles power transmission from high NA sources. It also provides a wide aperture receptor for visible to near IR wavelength sensing applications. A wide variety of fiber constructions simplify the selection of the appropriate product for your specific requirements.

 The patented *HCS polymer coating combined with large core, step-index silica-silica construction provides the benefits of high power transmission and high strength. The patented coating improves bend radius and ensures fiber survivability in rugged environments. In addition, the HCS polymer coating acts as a secondary cladding allowing primary cladding modes to be partially guided. This partial guiding preserves cladding modes in bends and distributes the lost power over a greater area lowering the probability of “hot spots” caused by high index, mode stripping coatings.

 For applications requiring an excellent chemical and high temperature resistant fiber, our PYROCOAT polyimide coating is offered. This coating withstands temperatures from –650 C to +3000 C with excursions up to 4000 C. To increase fiber durability in extremely harsh environments, a hermetic coating deposited under the PYROCOAT is available. PYROCOAT also acts as a cladding mode stripper to the silica cladding. This combined with the ultra low OH- content of Ultrasil, creates a fiber with a remarkably low and flat spectral attenuation curve.  Ultrasil PYROCOAT fiber is without a doubt the ultimate fiber for spectroscopy applications!

Data by PN	BF04746-02	BF04830-01	BF04830-02
Dimensions/Geometric Properties
Core Diameter	330 +/- 10 um	200 +/- 6 um	300 +/- 10 um
Cladding diameter	400 +/-8um	240 +/-5 um	385 +/-8 um
Coating diameter	430 +5/-10 um	270 +/- 5 um	415 +/- 5 um
Buffer diameter	730 +/-30 um	N/A	N/A
Core/Cladding offset	< 8um	N/A	N/A
Coating concentricity	N/A	> 80%	> 80%
Optical Properties
Numerical aperture	0.29	0.29	0.29
Attenuation @ 850nm	< 8 dB/km	< 8 dB/km	< 8 dB/km
Water content	Low OH	Low OH	Low OH
Buffer and/or Coating Descriptions
Cladding material	HCS	PYROCOAT	PYROCOAT
Buffer material	Tefzel (ETFE)	N/A	N/A
Operating temperature	-65 to +125 oC	-65 to +300 oC	-65 to +300 oC
Mechanical and Testing Data
Short-term bend radius	> 30 mm	> 18 mm	> 30 mm
Long-term bend radius	> 49 mm	> 130 mm	> 49 mm
Proof test level	> 100 kpsi (0.689 GPa)	> 100 kpsi (0.689 GPa)	> 100 kpsi (0.689 GPa)

*HCS is a registered trade mark of OFS Specialty Photonics Division

 Spectral attenuation (typical)