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Tunable ring laser using a tapered single mode fiber tip.

Xiaozhen Wang1, Yi Li, Xiaoyi Bao

  • 1Department of Physics, University of Ottawa, 150 Louis Pasteur,Ottawa, Ontario K1N 6N5, Canada.

Applied Optics
|December 17, 2009
PubMed
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This summary is machine-generated.

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This study introduces a novel, cost-effective tunable ring laser utilizing a tapered fiber optic tip as a bandpass filter. The laser achieves a 9 nm tuning range in the L-band, with adjustable spectral linewidths.

Area of Science:

  • Photonics and Optical Engineering
  • Fiber Optics Technology

Background:

  • Tunable lasers are crucial for various applications, including optical communications and spectroscopy.
  • Existing tunable laser sources can be complex and expensive.

Purpose of the Study:

  • To propose and demonstrate a novel, simple, and cost-effective tunable ring laser.
  • To investigate the performance of a tapered single mode fiber tip as a bandpass filter in a laser cavity.

Main Methods:

  • A ring laser cavity was constructed incorporating a tapered single mode fiber tip.
  • The fiber tip was designed to function as a tunable bandpass filter.
  • Experimental measurements were performed to characterize the laser's tuning range and spectral linewidth.

Main Results:

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  • The proposed laser demonstrated a tuning range of 9 nm within the L-band.
  • The spectral linewidth was found to be adjustable, varying between 0.06 nm and 0.17 nm.
  • Key parameters influencing laser performance include optical amplifier relaxation time, amplifier current, and fiber tip geometry.

Conclusions:

  • A simple and cost-effective tunable ring laser has been successfully demonstrated.
  • The tapered fiber optic tip serves as an effective tunable bandpass filter.
  • The study provides insights into controlling laser tuning range and spectral linewidth.