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Proceedings Paper

Reconstruction of field distributions of an active multicore fiber in multimode fibers
Author(s): Marc Wrage; Peter Glas; M. Leitner; Thomas Sandrock; Nickolai N. Elkin; Anatoly P. Napartovich; Dmitri V. Vysotsky
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Paper Abstract

Multimode interference is fairly known from the 1D case of slab waveguides. We present for the first time to our knowledge the reconstruction of the 2D radial symmetric structure of a multicore fiber laser in a multimode fiber. In the concept of multicore fiber, rare earth-doped single mode waveguides (micro cores) are placed on a ring inside a big pump core. The situation of injecting radiation from N incoherent emitting sources into a multimode waveguide is described analytically. Experimental and numerical results for various multimode diameters and fiber lengths dealing with the reconstruction of the injected near-field pattern and the corresponding far-field patterns are presented. We propose that the reconstructed field could be re-injected into the multicore fiber-laser in order to introduce parallel coupling of all emitters. Additionally, using the multimode fiber as a passive element, without re-injection, the on-axis intensity of the multicore laser radiation is significantly increased by a single pass through a multimode fiber with a certain length. This effect takes place without any loss of energy.

Paper Details

Date Published: 12 May 2000
PDF: 10 pages
Proc. SPIE 3930, Laser Resonators III, (12 May 2000); doi: 10.1117/12.385405
Show Author Affiliations
Marc Wrage, Max-Born-Institut feur Nichtlineare Optik und Ultrakurzzeitspektroskopie (Germany)
Peter Glas, Max-Born-Institut feur Nichtlineare Optik und Ultrakurzzeitspektroskopie (Germany)
M. Leitner, Max-Born-Institut feur Nichtlineare Optik und Ultrakurzzeitspektroskopie (Germany)
Thomas Sandrock, Max-Born-Institut feur Nichtlineare Optik und Ultrakurzzeitspektroskopie (Germany)
Nickolai N. Elkin, Troitsk Institute of Innovation and Fusion Research (Russia)
Anatoly P. Napartovich, Troitsk Institute of Innovation and Fusion Research (Russia)
Dmitri V. Vysotsky, Troitsk Institute of Innovation and Fusion Research (Russia)


Published in SPIE Proceedings Vol. 3930:
Laser Resonators III
Alexis V. Kudryashov; Alan H. Paxton, Editor(s)

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