Apparatus for injecting high power laser light into a fiber opti

Details Apparatus for injecting high power laser light into a fiber opti Apparatus for injecting high power laser light into a fiber opti

1995-08-24

1997-11-11

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

359 19, 359565, 359569, 385 37, G02B 632

Patent

active

056872640

ABSTRACT:
High intensity laser light is evenly injected into an optical fiber by the combination of a converging lens and a multisegment kinoform (binary optical element). The segments preferably have multi-order gratings on each which are aligned parallel to a radial line emanating from the center of the kinoform and pass through the center of the element. The grating in each segment causes circumferential (lateral) dispersion of the light, thereby avoiding detrimental concentration of light energy within the optical fiber.

REFERENCES:
patent: 3698789 (1972-10-01), Wolber
patent: 3809455 (1974-05-01), Pekau et al.
patent: 4585307 (1986-04-01), Dammann et al.
patent: 5132079 (1992-07-01), Stewart et al.
patent: 5132843 (1992-07-01), Aoyama et al.
patent: 5140657 (1992-08-01), Thylen
patent: 5513289 (1996-04-01), Hosokawa et al.
Sweatt et al, Kinoform/lens system for injecting a high power laser beam into an optical fiber, SPIE, vol. 2114, pp. 82-86, Jul. 1994.

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