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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Actively mode-locked fiber ring laser by intermodal acousto-optic modulation.

M Bello-Jiménez1, C Cuadrado-Laborde, D Sáez-Rodríguez

  • 1Departamento de Física Aplicada y Electromagnetismo, ICMUV, Universidad de Valencia, C/Dr. Moliner 50, Burjassot 46100, Valencia, Spain.

Optics Letters
|November 18, 2010
PubMed
Summary
This summary is machine-generated.

We developed a novel acousto-optic modulator for an actively mode-locked fiber ring laser. This device achieves high modulation depth and broad bandwidth, enabling efficient optical pulse generation.

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Materials Science

Background:

  • Mode-locked fiber lasers are crucial for generating ultrashort optical pulses.
  • Existing mode-locking mechanisms can be complex or suffer from high insertion losses.
  • Developing efficient and low-loss active modulators is essential for advancing laser technology.

Purpose of the Study:

  • To report a novel actively mode-locked fiber ring laser system.
  • To introduce a simple, low-insertion-loss acousto-optic modulator for mode locking.
  • To characterize the performance of the developed modulator and laser.

Main Methods:

  • An acousto-optic modulator driven by standing flexural waves was designed and implemented.
  • The modulator couples core-to-cladding modes in a standard single-mode optical fiber.
  • The fiber ring laser was actively mode-locked using the developed acousto-optic modulator.

Main Results:

  • The acousto-optic modulator exhibited high modulation depth (72%) and broad bandwidth (187 GHz).
  • Low insertion losses (0.7 dB) and easy optical wavelength tunability were achieved.
  • The narrowest optical pulses generated had a time width of 95 ps and 21 mW peak power.

Conclusions:

  • The developed acousto-optic modulator is an effective and efficient active mechanism for mode locking fiber ring lasers.
  • The modulator's performance characteristics (high modulation depth, broad bandwidth, low loss) are advantageous for pulse generation.
  • This work contributes to the development of advanced fiber laser systems for various applications.