A Selectable Single-Mode Erbium Laser with Power-Flattened Output Employing Dual-Sagnac-Ring

Chien Hung Yeh*, Wen Piao Lin, Yao Jen Chang, Yue Ru Xie, Chien Ming Luo, Chi Wai Chow

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


To achieve wavelength-selectable and stable erbium-doped fiber (EDF) laser, a dual-Sagnac-ring configuration is designed to reach single-longitudinal-mode (SLM) oscillation and power-flattened output simultaneously. The presented and experimentally demonstrated EDF laser can also obtain the output power of 7.5 to 11.8 dBm in the continuous-wave (CW) tunability of 1523.0 to 1571.0 nm. Here, the power variation of lasing wavelength can be below than 1.0 dB over a wide working range of 1525.0-1565.0 nm for power-flattened output. Moreover, the 3-dB spectrum linewidth of presented EDF-based laser is measured in the range of 16.4-22.2 kHz via the Lorentzian fitting.

Original languageEnglish
Article number8764533
Pages (from-to)92938-92942
Number of pages5
JournalIEEE Access
StatePublished - 1 Jan 2019


  • erbium-doped fiber (EDF)
  • Fiber laser
  • sagnac-ring
  • single-longitudinal-mode (SLM)
  • C-BAND

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