550-mW output power from a narrow linewidth all-phosphate fiber laser

Peter Hofmann, Christian Voigtländer, Stefan Nolte, N. Peyghambarian, Axel Schülzgen

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


We present a compact monolithic all-phosphate glass fiber laser with up to 550 mW of output power operating on a single longitudinal mode. We measured a linewidth of less than 60 kHz and relaxation oscillation peak amplitudes below -100 dB/Hz without active RIN-supression. The laser cavity has been formed by inscribing fiber Bragg gratings (FBG) directly into heavily Er 3+Yb3+ doped phosphate glass fiber using femtosecond laser pulses and a phasemask. The compact form factor and higher output power combined with the low noise and narrow line width characteristic make this laser an ideal candidate for ranging, interferometry and sensing applications.

Original languageEnglish (US)
Article number6378381
Pages (from-to)756-760
Number of pages5
JournalJournal of Lightwave Technology
Issue number5
StatePublished - 2013


  • Fiber Bragg grating (FBG)
  • optical fiber fabrication
  • photo thermo refractive glass
  • photosensitivity

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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