976 nm single-polarization single-frequency ytterbium-doped phosphate fiber amplifiers

Xiushan Zhu, Gongwen Zhu, Wei Shi, Jie Zong, Kort Wiersma, Dan Nguyen, Robert A. Norwood, Arturo Chavez-Pirson, Nasser Peyghambarian

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Core-pumped 976 nm single-polarization singlefrequency fiber amplifiers based on several centimeter long polarization maintaining 6 wt% ytterbium (Yb3+) doped phosphate fibers are investigated experimentally and numerically. A 350 mW linearly polarized output with > 20 dB polarization extinction ratio and > 50 dB optical signal-to-noise ratio is obtained from a 4 cm fiber amplifier at maximum available pump power of 793 mW. The slope efficiency of the 4 cm fiber amplifier is 52.5%. A small signal net gain of 25 dB, corresponding to a unit gain of over 6 dB/cm is achieved in this fiber. It is predicted that a watt level 976 nm core-pumped fiber amplifier can be achieved using more powerful pumps and low insertion loss optical components.

Original languageEnglish (US)
Article number6544603
Pages (from-to)1365-1368
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number14
StatePublished - 2013


  • Fiber amplifier
  • phosphate fiber
  • single-polarization single-frequency laser
  • ytterbium-doped fiber amplifier

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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