Ultralow-quantum-defect single-frequency fiber laser

Khawlah Al Yahyaei, Xiushan Zhu, Lizhu Li, Jie Zong, Maohe Li, Junqin Wang, Jason Meyer, Arturo Chavez-Pirson, Robert A. Norwood, Nasser Peyghambarian

Research output: Contribution to journalArticlepeer-review


A single-frequency distributed-Bragg-reflector fiber laser at 980 nm with a quantum defect of less than 0.6% was developed with a 1.5-cm 12 wt% ytterbium-doped phosphate fiber pumped by a 974.5-nm laser diode. Linearly polarized single-longitude-mode laser with a polarization extinction ratio (PER) of nearly 30 dB and spectral linewidth of less than 1.8 kHz was obtained. A maximum output power of 275 mW was measured at a launched pump power of 620 mW. The performance of the single-frequency fiber laser pumped at 909 nm and 976 nm was also characterized. This research demonstrated an approach to high-power single-frequency fiber laser oscillators with mitigated thermal effects.

Original languageEnglish (US)
Pages (from-to)3817-3820
Number of pages4
JournalOptics letters
Issue number14
StatePublished - Jul 15 2023

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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