Stimulated Brillouin Scattering Phase Conjugation in Fiber Optic Waveguides (Paperback) (ISBN-13: 9781288320196)

The objective of this research effort was to demonstrate the path to continuous wave, coherent beam combination through stimulated Brillouin scattering phase conjugation in optical fiber. This work experimentally determined the fiber parameters necessary for phase conjugation in step-index optical fiber. Continuous wave phase conjugation using stimulated Brillouin scattering in step-index fibers was achieved for the first time with a fidelity of 0.8 and a threshold power of 16 W in a 15-m fiber with 0.13 NA. A fidelity of 0.8 was also achieved using 40 m of fiber with 0.06-NA and a threshold power of 15 W. The fidelity of phase conjugation was found to decline by 45% in an additional 20 m of 0.13-NA fiber and by 15% in 20 m of the 0.06-NA fiber. The effective Brillouin gain coefficient of the multimode fibers was found to vary directly with fidelity. A new technique using interference to measure fidelity was tested, and stimulated Brillouin scattering in a 2.5-km, graded-index fiber was found to produce beam cleanup to the fundamental fiber mode of the fiber with fidelity less than 0.1. This work demonstrated that coherent beam combining via continuous wave phase conjugation in optical fiber is achievable.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.

This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.

As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.