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Power scaling of a hybrid microstructured Yb-doped fiber amplifier
Author
Mart, CodyPulford, Benjamin
Ward, Benjamin
Dajani, Iyad
Ehrenreich, Thomas
Anderson, Brian
Kieu, Khanh
Sanchez, Tony
Affiliation
Univ Arizona, Coll Opt SciIssue Date
2017-02-22Keywords
Photonic Bandgap FiberPhotonic Crystal Fiber
Mode Instability
Stimulated Brillouin Scattering
Metadata
Show full item recordPublisher
SPIE-INT SOC OPTICAL ENGINEERINGCitation
Cody Mart ; Benjamin Pulford ; Benjamin Ward ; Iyad Dajani ; Thomas Ehrenreich ; Brian Anderson ; Khanh Kieu and Tony Sanchez " Power scaling of a hybrid microstructured Yb-doped fiber amplifier ", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 100830X (February 22, 2017); doi:10.1117/12.2249863; http://dx.doi.org/10.1117/12.2249863Rights
© 2017 SPIE.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Hybrid microstructured fibers, utilizing both air holes and high index cladding structures, provide important advantages over conventional fiber including robust fundamental mode operation with large core diameters (>30 mu m) and spectral filtering (i.e. amplified spontaneous emission and Raman suppression). This work investigates the capabilities of a hybrid fiber designed to suppress stimulated Brillouin scattering (SBS) and modal instability (MI) by characterizing these effects in a counter-pumped amplifier configuration as well as interrogating SBS using a pump-probe Brillouin gain spectrum (BGS) diagnostic suite. The fiber has a 35 mu m annularly gain tailored core, the center doped with Yb and the second annulus comprised of un-doped fused silica, designed to optimize gain in the fundamental mode while limiting gain to higher order modes. A narrow-linewidth seed was amplified to an MI-limited 820 W, with near-diffraction-limited beam quality, an effective linewidth similar to 1 GHz, and a pump conversion efficiency of 78%. Via a BGS pump-probe measurement system a high resolution spectra and corresponding gain coefficient were obtained. The primary gain peak, corresponding to the Yb doped region of the core, occurred at 15.9 GHz and had a gain coefficient of 1.92x10(-11) m/W. A much weaker BGS response, due to the pure silica annulus, occurred at 16.3 GHz. This result demonstrates the feasibility of power scaling hybrid microstructured fiber amplifiersISSN
0277-786XVersion
Final published versionae974a485f413a2113503eed53cd6c53
10.1117/12.2249863