Polyimide Coated Fiber for Embedded and High Temperature Applications
Survives composite embedding temperatures
Maintains composite material strength when embedded
Survives sterilisation temperatures
Conventional acrylate coatings have a temperature ceiling of c.85°C and must be applied to thicknesses of at least 40 µm to provide adequate mechanical protection. HB-P is coated with a 10 µm layer of polyimide – a high performance polymer used throughout the electronics industry. The result is a fiber of significantly reduced cross-sectional area (‘Low Profile’) which can withstand temperatures as high as 400°C (300°C continuous) – sufficient to withstand both medical sterilisation and the curing temperatures of even the highest performance laminates.
HB-P is particularly suited to embedded ‘Smart-Skins’ type applications because of its low-profile, which helps to maintain composite strength, through reductions in the area of the Resin Rich Zone (‘RRZ’).
Specifications
HB800P
HB1250P
Design Wavelength1
830 nm
1300 nm
Cut-off Wavelength
600 nm – 800 nm
1030 nm – 1270 nm
Numerical Aperture
0.14 – 0.18
Mode Field Diameter2
4.2 µm
6.6 µm
Attenuation3
<5 dB/km
<2 dB/km
Beat-Length4
<2 mm
Proof Test
1.0% (100 kpsi)
Outside Diameter (Fiber)
125 µm ± 1 µm
Core Cladding Concentricity
<1.0 µm
Outside Diameter (Coating)
145 µm (nominal)
1. The Design Wavelength is the wavelength (or wavelengths) at which the fiber is typically used. In practice, the fiber will transmit the TEM00 mode at wavelengths of up to approximately 200 nm longer than the cut-off wavelength.
2. The Mode Field Diameter is a nominal, calculated value, estimated at the operating wavelength(s) using typical value of numerical aperture and cut-off wavelength.
3. Attenuation is a worst-case value, quoted for the shortest design wavelength.
4. Beat Length is measured at 633 nm for all HB fiber types. To a first approximation, beat-length scales directly with operating wavelength.
Fibercore Limited's HiBi PM fiber - highly birefringent, bend insensitive polarization maintaining fiber - is fabricated using bow tie shaped stress applying parts (SAPs). Polarization maintaining couplers and PM patchcords also available. HB-P is a polyimde coated polarization maintaining fiber offering a high operating temperature.
Fibercore Limited, Fibercore House, University Parkway, Chilworth Science Park, Southampton, Hampshire, SO16 7QQ, United Kingdom
Tel: +44 (0)23 8076 9893 | Fax: +44 (0)23 8076 9895 | Email: info@fibercore.com
