Photonic crystal fiber technology for monolithic single-mode large mode area all-solid amplifier

Simon Lønborg Christensen, Sidsel R. Papior, Mette M. Johansen, Jakob Milo Hauge, Johannes Weirich, Christian Jakobsen, Mattia Michieletto, Magalie Bondu, Marco Triches, Thomas T. Alkeskjold, Jesper Lægsgaard

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In this work, an all-solid Ytterbium doped double-clad single-mode (SM) large-mode-area (LMA) photonic crystal fiber (PCF) is characterized in a monolithic amplifier setup. The characterized all-solid PCF combines the SM operation of LMA PCFs while maintaining simple splicing of all-solid fibers. The fiber has been tested in a pulsed monolithic forward pumped amplifier system achieving excellent modal properties. The fiber is polarization maintaining and has a mode field diameter of approximately 24 μm. At optimal fiber length the output signal power of the amplifier was measured to 43 W limited by pump power with an optical to optical efficiency of 61 %. Polarization extinction ratios (PER) above 18 dB was observed for all fiber lengths. Simple splicing with splice losses < 0.2 dB and maintained polarization are reported using a standard Fujikura fusion splicer.
Original languageEnglish
Title of host publicationProceedings of SPIE
Number of pages7
PublisherSPIE - International Society for Optical Engineering
Publication date2019
Article number108971L
Publication statusPublished - 2019
EventSPIE Photonics West LASE 2019 - The Moscone Center, San Francisco, United States
Duration: 2 Feb 20197 Feb 2019


ConferenceSPIE Photonics West LASE 2019
LocationThe Moscone Center
CountryUnited States
CitySan Francisco
SeriesProceedings of SPIE, the International Society for Optical Engineering


  • Photonic crystal fiber
  • Fiber amplifier
  • Ultrafast
  • Monolithic
  • Single-mode
  • All-solid fiber
  • High power
  • Largemode-area

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