Laser photocuring system

• US 6,463,872 B1
• Filed: 03/31/2000
• Issued: 10/15/2002
• Est. Priority Date: 03/31/2000
• Status: Expired due to Fees

• Current Assignee: Alcatel SA (Nokia Corporation)
• Original Assignee: Alcatel SA (Nokia Corporation)
• Inventors: Thompson, Justin
• Primary Examiner(s): Crispino, Richard
• Assistant Examiner(s): Tadesse, Yewebdar T
• Application Number:
  US09/540,906
• Time in Patent Office: 928 Days
• Field of Search: 118/50.1, 118/420, 118/DIG.18, 118/641, 118/58, 118/68, 653/92, 654/31, 250/493.1, 250/504.R, 427/163.1
• US Class Current: 118/50.1
• CPC Class Codes: C03C 25/12 General methods of coating; Devices therefor

Abstract

A system and a method for curing a coating applied to an optical fiber or optical fiber ribbon using a laser curing device which emits a plurality of laser beams, having a predetermined wavelength or wavelength range, that impinge on the fiber or ribbon at differing angles to provide a uniform cure. The system includes at least one laser for outputting a laser beam; a splitter for splitting the laser beam into a plurality of output beams; and reflector arrangement for reflecting the output beams such that the output beams are irradiated on the coating of the optical fiber from different angles. The reflector comprises a plurality of mirrors or, alternatively, a housing, which substantially surrounds the optical fiber where at least a portion of an inner surface of the housing is reflective. Alternatively, the reflector may be replaced with a bundle of UV-waveguides directing portions of the beam to the substrate at different angles and/or directions. The system may also include a second laser for outputting a second laser beam which impinges on the fiber, where the wavelength range of the second laser is in a range that is different from the wavelength range of the first laser.

Claims

1. A system for curing a coating applied to an optical fiber or optical fiber ribbon, comprising:

a laser for outputting a laser beam;

a splitter for splitting said laser beam into a plurality of output beams; and

a reflector device for reflecting said output beams such that said output beams are irradiated on said coating of said optical fiber or optical fiber ribbon from different angles.

2. The system of claim 1, wherein said reflector device comprises a plurality of mirrors.

3. The system of claim 1, wherein said reflector device comprises a housing which substantially surrounds said optical fiber, at least a portion of an inner surface of said housing being reflective to the wavelength emitted by the laser.

4. The system of claim 1, wherein said splitter comprises a beam splitter.

5. The system of claim 4, wherein said laser beam has a wavelength in one of a first range of 250-350 nm and a second range of 350-450 nm.

6. The system of claim 5, further comprising a second laser for outputting a second laser beam which impinges on said fiber or ribbon.

7. The system of claim 6, wherein the wavelength range of said second laser is in the other of the first range and the second range.

8. The system of claim 6, further comprising a second beam splitter for splitting said second laser beam into a plurality of second output beams and a second reflector device for reflecting said second output beams such that said second output beams are irradiated on said coating of said optical fiber or ribbon from different angles.

9. The system of claim 8, wherein said second reflector device comprises a plurality of mirrors.

10. A system for curing a coating applied to an optical fiber or ribbon, comprising:

a plurality of lasers for respectively outputting a plurality of laser output beams, said output beams being irradiated on said coating of said optical fiber or ribbon from different angles.

11. The system of claim 10, further comprising at least one reflector for reflecting said output beams to control said different angles.

12. The system of claim 10, wherein said output beams have a wavelength in the range of 250-450 nm.

13. The system of claim 10, wherein said output beam of a first of said lasers has a wavelength in a first range of 250-350 nm and said output beam of a second of said lasers has a wavelength in a second range of 350-450 nm.

14. The system of claim 10, wherein said output beam of a first of said lasers has a wavelength that is different from the wavelength of said output beam of a second of said lasers.

15. A system for curing a coating applied to an optical fiber or ribbon, comprising:

a laser for outputting a laser beam, said laser beam being split into a plurality of output beams which impinge on said fiber or ribbon from different angles.

16. A system for curing a coating applied to an optical fiber or optical fiber ribbon substrate, comprising:

a laser for outputting a laser beam; and

a bundle of UV-optical fibers for directing the lasers UV-radiation towards said optical fiber or said optical fiber ribbon from a plurality of different directions.