Ultrashort pulse written fiber Bragg gratings in multicore fibers as wavelength filters

Thorsten A. Goebel; Daniel Richter; Timothy O. Imogore; Christian Matzdorf; Maximilian Heck; Ria G. Krämer; Stefan Nolte

doi:10.1117/12.2562047

13 December 2020 Ultrashort pulse written fiber Bragg gratings in multicore fibers as wavelength filters

Thorsten A. Goebel, Daniel Richter, Timothy O. Imogore, Christian Matzdorf, Maximilian Heck, Ria G. Krämer, Stefan Nolte

Author Affiliations +

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 1145169 (2020) https://doi.org/10.1117/12.2562047
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

We present the inscription of fiber Bragg gratings (FBG) into multicore fiber (MCF) as wavelength filter for the suppression of atmospheric emission lines. By applying the phase mask technique and ultrashort laser pulses we can homogeneously modify all cores of a seven core MCF. To overcome intrinsic core-to-core variations, we present a method of post-processing an individual core by photo-treatment with ultrashort laser pulses to compensate for those deviations. The correction is performed by in-situ monitoring the resonance wavelength and illuminating the individual cores. Due to the nonlinear absorption we can precisely address single cores for the post-processing. Additionally, inscription into a tailored 12-core fiber is presented.

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Thorsten A. Goebel, Daniel Richter, Timothy O. Imogore, Christian Matzdorf, Maximilian Heck, Ria G. Krämer, and Stefan Nolte "Ultrashort pulse written fiber Bragg gratings in multicore fibers as wavelength filters", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 1145169 (13 December 2020); https://doi.org/10.1117/12.2562047

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