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Related Experiment Video

Updated: Jun 4, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Dual-wavelength distributed feedback fiber laser based on double exposure and equivalent phase shift method.

Linghui Jia1, Zuowei Yin, Liang Zhang

  • 1Microwave-Photonics Technology Laboratory, Nanjing National Laboratory of Microstructures, School of Modern Engineering and Applied Sciences, Nanjing University, Nanjing, China. lancangziyue@gmail.com

Applied Optics
|February 2, 2011
PubMed
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A novel sampling structure enables stable dual-wavelength lasing in distributed feedback fiber lasers. This breakthrough achieves precise phase control for enhanced laser performance and specific wavelength spacing.

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Materials Science

Background:

  • Distributed feedback fiber lasers (DFB-FLs) are crucial for various photonic applications.
  • Achieving stable dual-wavelength lasing in DFB-FLs presents significant challenges.
  • Existing methods often require complex fabrication or precise control.

Purpose of the Study:

  • To propose and experimentally validate a novel sampling structure for dual-wavelength lasing in DFB-FLs.
  • To demonstrate precise phase control using an equivalent phase shift method.
  • To achieve stable dual-wavelength output with a specific wavelength spacing.

Main Methods:

  • A special sampling structure utilizing double exposure technology with two grating pitches per sampling period.

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  • Fabrication by adjusting fiber length.
  • Implementation of an equivalent phase shift for submicrometer-level phase control.

    • Main Results:

    • Successful experimental demonstration of a stable dual-wavelength laser.
    • Achieved wavelength spacing of 400 pm.
    • Obtained output power of 30.46 μW and sidemode suppression ratio of 46 dB.

    Conclusions:

    • The proposed sampling structure effectively enables stable dual-wavelength lasing in DFB-FLs.
    • The method allows for precise phase control with relaxed fabrication tolerances.
    • This technique offers a viable solution for generating dual-wavelength fiber lasers.