All-fiber laser coupler with high stability

Details All-fiber laser coupler with high stability All-fiber laser coupler with high stability

2008-05-06

2010-06-15

Song, Sarah (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling function

C385S115000, C385S043000, C372S006000

Reexamination Certificate

active

07738751

ABSTRACT:
An optical coupler is provided for a passive coherent combination of fiber lasers/amplifiers. A plurality of optical fibers are arranged in a close-packed hexagonal array having 1+3n(n+1) fibers with (3/2)(n2−n)+3 interferometrically dark fibers and (3/2)(n2+3n)−2 light fibers, where n is an integer greater than or equal to 1. Each optical fiber has a first end and a second end. The plurality of optical fibers are fused together along a section of each optical fiber proximate the first end of each optical fiber to form a fused section having a fiber axis. The fused section of the plurality of optical fibers is tapered to form a tapered region. A facet is at an end of the fused section. The facet is disposed in a direction perpendicular to the fiber axis. The coherent pattern is highly stable against perturbation.

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