Photoinitiator--tuned optical fiber and optical fiber ribbon and

Details Photoinitiator--tuned optical fiber and optical fiber ribbon and Photoinitiator--tuned optical fiber and optical fiber ribbon and

1997-12-31

2000-01-25

Bovernick, Rodney

Optical waveguides

Optical transmission cable

Ribbon cable

385128, 385144, G02B 644

Patent

active

060186054

ABSTRACT:
An optical fiber (20) includes a silica-based core (22) which is operative to transmit light and is surrounded by a silica-based cladding (24) having a lower index of refraction than the core (22). A primary coating (26) surrounds cladding (24), and a secondary coating (28) surrounds primary coating (26). Optical fiber ribbon (40) includes a ribbon matrix material (42) which surrounds a plurality of optical fibers (20). Primary coating (26) comprises a photinitiator which has a peak absorbance in a relatively short wavelength UV spectrum. Secondary coating (28) comprises a photinitiator which has a peak absorbance in a relatively long wavelength UV spectrum. A method of making optical fiber (20) by irradiating primary coating (26) with a first radiation source (74), the first radiation source has an emission spectrum with a potent wavelength band, the peak absorbance of the photinitiator in primary coating (26) has a wavelength band which is complementary to that of the potent wavelength band of the radiation source (74) whereby primary coating (26) is rapidly cured. The method further includes applying secondary coating (28) on the cured primary coating. Secondary coating (28) has a photoinitiator with a peak absorbance in a relatively long wavelength UV spectrum of about 300-320 nm. Secondary coating (28) is then irradiated with a second radiation source (78), for example, an excimer type UV radiation source with an emission spectrum having a potent wavelength band between about 300-350 nm, and a dosage ability of over 207.2 Watts. The peak absorbance of the photinitiator in secondary coating (28) is complementary to that of the potent wavelength band of second radiation source (78) whereby secondary coating (28) is rapidly cured.

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