Optical automatic gain control of EDFA using two oscillating lasers in a single feedback loop

Chun Liu Zhao, Hwa Yaw Tam, Bai Ou Guan, Xinyong Dong, Ping Kong Alexander Wai, Xiaoyi Dong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)


A novel configuration for automatic gain control of optical amplifiers is presented. It uses a F-P filter with 26.7 nm free spectral range and two long-period gratings (LPGs) to produce two lasing wavelengths in a single feedback loop. By bending the LPGs, the cavity losses at different wavelengths can be varied independently to achieve single and two oscillating lasers control conditions. The experimental result suggested that the simple configuration could be employed to significantly reduce the surviving channel steady-state and transient power excursion.
Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalOptics Communications
Issue number1-3
Publication statusPublished - 15 Sep 2003


  • EDFA
  • Inhomogeneity
  • Optical gain control
  • Relaxation oscillations
  • Spectral hole burning

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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