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Distributed ultrafast fibre laser.

Xueming Liu1, Yudong Cui1, Dongdong Han1

  • 1State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China.

Scientific Reports
|March 14, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a novel distributed ultrafast (DUF) fiber laser. This innovative laser features a wavelength-tunable cavity length, offering a simple, stable, and cost-effective ultrafast-pulsed light source.

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Area of Science:

  • Photonics and Laser Technology
  • Ultrafast Optics
  • Fiber Lasers

Background:

  • Traditional ultrafast fiber lasers possess a fixed cavity length, irrespective of pulse wavelength.
  • Investigating distributed ultrafast (DUF) lasers presents significant conceptual and technical challenges due to their wavelength-dependent cavity length and frequency.

Purpose of the Study:

  • To propose and demonstrate a novel distributed ultrafast (DUF) fiber laser.
  • To achieve a laser cavity length that is dynamically tunable with the pulse wavelength.

Main Methods:

  • Development of a DUF fiber laser utilizing a linearly chirped fiber Bragg grating.
  • Characterization of the laser's cavity length tunability as a function of pulse wavelength.

Main Results:

  • Demonstrated a linearly tunable cavity length in the DUF fiber laser.
  • Observed enhanced spectral sidebands, including continuous-wave (CW) and pulsed components.
  • Confirmed consistent round-trip times for all pulse sidebands despite varying optical paths.

Conclusions:

  • The proposed DUF fiber laser offers a simple, stable, and low-cost solution for ultrafast pulsed light generation.
  • Pulse shaping is primarily governed by dissipative processes and phase modulations, contributing to laser stability.
  • The developed laser provides a controllable and changeable cavity frequency, enabling tunable ultrafast light sources.