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Related Experiment Videos

Simple system for optical short-pulse generation in both active mode-locking and self-seeding schemes.

Xiaohui Fang1, D N Wang, W Jin

  • 1Hong Kong Polytechnic University, Department of Electrical Engineering, Hung Hom, Kowloon, China.

Applied Optics
|April 21, 2006
PubMed
Summary

This study introduces a simple system for generating tunable optical short pulses using active mode-locking and self-seeding. The developed method achieves stable, high-quality pulses over a broad wavelength range.

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Area of Science:

  • Photonics
  • Optical Engineering
  • Laser Physics

Background:

  • Mode-locking is crucial for generating ultrashort optical pulses.
  • Simultaneous active mode-locking and self-seeding can enhance pulse quality and tunability.
  • Existing systems may lack simplicity or broad wavelength tunability.

Purpose of the Study:

  • To propose a simple system for wavelength-tunable optical short-pulse generation.
  • To simultaneously support active mode-locking and self-seeding schemes.
  • To characterize the performance of the proposed system.

Main Methods:

  • A system comprising a gain-switched Fabry-Perot laser diode, erbium-doped fiber amplifier, tunable optical filter, and two circulators was designed.
  • Active mode-locking and self-seeding were simultaneously implemented.

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  • Optical pulses were generated and their properties measured.

    • Main Results:

    • The system successfully generated wavelength-tunable optical short pulses.
    • Mode-locked pulses exhibited good stability.
    • A high side-mode suppression ratio (>31 dB) was achieved over a 42 nm tuning range.
    • Pulses had a width of ~35 ps at a repetition frequency of ~2.8 GHz.

    Conclusions:

    • The proposed simple system effectively integrates active mode-locking and self-seeding for optical short-pulse generation.
    • The system demonstrates excellent performance in terms of stability, side-mode suppression, and wavelength tunability.
    • This approach offers a viable solution for generating high-quality, tunable optical pulses.