Multiple output fiber laser with passive frequency control and m

Details Multiple output fiber laser with passive frequency control and m Multiple output fiber laser with passive frequency control and m

1995-07-28

1997-02-04

Scott, Jr., Leon

Coherent light generators

Optical fiber laser

372102, 372 97, 372 19, 372 18, 372 32, H01S 330

Patent

active

056006659

ABSTRACT:
A passively controlled multiple output fiber laser system in which the frequency relationships between all of the optical outputs remain constant over time includes a plurality of fiber lasers for generating respective output beams. The lasers are positioned in close proximity to each other so that they experience the same environmental conditions. Each laser includes at least one Bragg reflection grating that controls the frequency and bandwidth of the laser's output beam. The Bragg gratings are formed so that they respond equally to environmental changes. In a preferred embodiment, the fiber lasers are made from a plurality of substantially identical photosensitive fibers, and Bragg gratings are exposed simultaneously under identical exposure conditions in each of the fibers. A multiple output fiber laser system suitable for heterodyne LADAR systems is also provided.

REFERENCES:
patent: 5187760 (1993-02-01), Huber
patent: 5511083 (1996-04-01), D'Amato et al.
Hill et al., "Bragg gratings fabricated in monomode photosensitive optical fiber by UV exposure through a phase mask", Applied Physics Letters, vol. 62, No. 10, Mar. 8, 1993, pp. 1035-1037.
G. A. Ball et al., "Design of a Single-Mode Linear-Cavity Erbium Fiber Laser Utilizing Bragg Reflectors", Journal of Lightwave Technology, vol. 10, No. 10, Oct. 1992, pp. 1338-1343.
Saleh et al., "Fundamentals of Photonics", John Wiley & Sons, Inc., 1991, pp. 581-519.

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