Spun Fiber Optic Special Fiber for Key Sensitive Devices

Spun fiber optic mainly used in key sensitive devices such as optic fiber current transformer. Which has the ability of maintaining circular polarization and resisting environmental interference. The high birefringence fiber preform used to spin at high speed in the process of wire drawing. The two intrinsic modes of the spun optic fiber manufactured by this special process are elliptically polarized. And its inherent birefringence can effectively resist the stress caused by external conditions. Such as temperature, bending, vibration, etc.

In order to effectively maintain the characteristics of circularly polarized light. Spun optical fiber can not only maintain circularly polarized light, but also has a very outstanding ability to resist environmental interference. And can ensure extremely high working accuracy under the conditions of temperature fluctuation and vibration. Good geometric and optical properties.

Product Characteristics

*Good geometric and optical properties;
*With minimal phase difference, circular polarization transmission can maintained over long distances;
*Insensitive to temperature and stress;

Specifications of Spun Fiber

Properties Unit Product Indicator
Product type / T-OF044 T-OF045 T-OF046
           Optical properties
Structure type nm Elliptical core type Panda type Bow tie type
Working wavelength nm 1310 1310 1310
Cutoff wavelength nm 1100~1290 1100~1290 1100~1290
Mode field diameter μm 6.5±1.0 6.5±1.0 6.5±1.0
Attenuation dB/km ≤2.0 ≤2.0 ≤2.0
Helical distance mm 2.0~5.0 2.0~5.0 2.0~5.0
Beat length mm ≤10.0(before spinning) ≤10.0(before spinning) ≤10.0(before spinning)
Geometric properties
Cladding diameter μm 125.0±1.0 125.0±1.0 125.0±1.0
Coating type / Double-layer UV-curable acrylic resin Double-layer UV-curable acrylic resin Double-layer UV-curable acrylic resin
Coating diameter μm 245.0±5.0 245.0±5.0 245.0±5.0
Cladding out-of-roundness / ≤2.0% ≤2.0% ≤2.0%
Core-cladding concentricity μm ≤1.0 ≤1.0 ≤1.0
Optic fiber twist turns/m ≤1.0 ≤1.0 ≤1.0
Environmental and mechanical properties
Operating temperature ºC -55~+85 -55~+85 -55~+85
Screening tension kpsi 100 100 100

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