Assymptotically single mode hybrid fiber with a high anomalous dispersion in the 1µm wavelength region

Svetlana S. Aleshkina; Mikhail E. Likhachev; Andrei K. Senatorov; Mikhail M. Bubnov; Mikhail V. Yashkov; Mikhail Yu Salganskii; Alexei N. Guryanov

doi:10.1117/12.2079091

4 March 2015 Assymptotically single mode-hybrid fiber with a high anomalous dispersion in the 1μm wavelength region

Svetlana S. Aleshkina, Mikhail E. Likhachev, Andrei K. Senatorov, Mikhail M. Bubnov, Mikhail V. Yashkov, Mikhail Yu Salganskii, Alexei N. Guryanov

Author Affiliations +

Proceedings Volume 9344, Fiber Lasers XII: Technology, Systems, and Applications; 934405 (2015) https://doi.org/10.1117/12.2079091
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

Cylindrically symmetric hybrid fiber proposed by our group recently allow one to achieve high anomalous dispersion (13-100 ps/nm/km) in the 1 μm spectral range. Refractive index of such fibers consists of one or two high index ring layer surrounding the core and depressed layer placed outside the ring layer. The drawback of the realized designs was presence of modes, localized in high-index rings, which tails nevertheless spread over the hybrid fiber core. Excitation of the operating hybrid mode LP₀₃ in the two high-index ring design (or LP₀₂ in the one high-index layer design) was accompanied by weak excitation (10-20% of total propagating power) of the modes, located in the high-index rings, that has non-zero electric field at fiber axis (mainly LP₀₂ mode for two high-index layers design and LP₀₁ for one high-index layer design).

In the present work we have experimentally demonstrated possibility to suppress all the propagating modes except the operating hybrid one (LP₀₃ for two high-index layer design). The main idea is based on introduction a thin ring layer with an extremely high optical loss to the position of electrical field minimum of the operating hybrid mode. Analysis of the mode composition carried out by off-center hybrid mode excitation confirms the asymptotically single-mode propagation regime.

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Svetlana S. Aleshkina, Mikhail E. Likhachev, Andrei K. Senatorov, Mikhail M. Bubnov, Mikhail V. Yashkov, Mikhail Yu Salganskii, and Alexei N. Guryanov "Assymptotically single mode-hybrid fiber with a high anomalous dispersion in the 1μm wavelength region", Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 934405 (4 March 2015); https://doi.org/10.1117/12.2079091

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