for Fiber Optic Gyroscopes

With service-environments ranging from the Arctic through to the desert and even into outer-space, all of the components of a high-grade Fiber Optic Gyroscopes must continue to deliver their best performance over the broadest possible temperature range.

HB-G has a unique, dual-layer, acrylate coating which provides all of the low-temperature performance of a conventional, silicone-rubber coating - plus, the additional benefits of optical mode-stripping and total freedom from 'crumbing' during mechanical removal. Test coils have demonstrated extinction ratios of -27 dB at temperatures as low as -60°C.


HB800G HB1250G HB1500G
Design Wavelength1830 nm 1300 nm1550 nm
Cut-off Wavelength600-800nm 1030-1270nm 1230-1520nm
Numerical Aperture0.16 +/- 10%
Attenuation2 <5 dB/km <2 dB/km <2 dB/km
Beat-Length3 <1.5mm
Proof Test 0.5% or 1.0% (50 kpsi or 100 kpsi)
Outside Diameter4 (Fibre) 80µm +/- 1% RMS
Core Cladding Concentricity <1.0µm or 0.5 µm
Outside Diameter (Coating) 175µm +/- 5%

1. The Design Wavelength is the wavelength (or wavelengths) at the which the fibre is typically used. In practice, the fibre will transmit a TEM00 mode at any wavelength within an operating window extending approximately 200 nm from the cut-off wavelength.
2. Attenuation is quoted for the shortest Design wavelength.
3. Beat-length is measured at 633 nm for all fibre types. To a first approximation, beat-length scales directly with operating wavelength.
4. Localised, peak-to-peak variations of up to 3% may be experienced.

For more information, contact:
Phone: (727) 547-8307
Fax: (727) 547-0687

E-mail: fiberoptics@metrotek.com

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