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Polymer laser based on active waveguide grating structures.

Tianrui Zhai1, Xinping Zhang, Zhaoguang Pang

  • 1Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing, China.

Optics Express
|April 1, 2011
PubMed
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Active waveguide grating structures (AWGS) enable distributed feedback (DFB) polymer lasers. This configuration, using a polymer film as both gain medium and waveguide, shows potential for efficient, electrically pumped organic lasers.

Area of Science:

  • Optoelectronics
  • Materials Science
  • Photonics

Background:

  • Polymer lasers offer tunable and cost-effective light sources.
  • Distributed feedback (DFB) configurations are crucial for achieving narrow linewidth laser emission.
  • Integrating gain medium and waveguide functions in a single material simplifies device architecture.

Purpose of the Study:

  • To demonstrate active waveguide grating structures (AWGS) as a DFB configuration for polymer lasers.
  • To investigate the potential of a specific light-emitting polymer as both gain medium and waveguide.
  • To explore the suitability of this AWGS configuration for electrically pumped polymer lasers.

Main Methods:

  • Fabrication of grating structures on a polymer film using interference lithography.

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  • Utilizing a thin film of poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(1,4-benzo-{2,1',3}-thiadiazole)] as the active layer.
  • Characterization of laser emission properties, including linewidth.

    • Main Results:

    • Demonstration of DFB laser action in the polymer system.
    • Continuous and high-quality waveguide layer achieved.
    • Narrow linewidth laser emission observed due to the waveguide properties.

    Conclusions:

    • The AWGS configuration shows excellent potential for organic DFB lasers.
    • This approach is particularly significant for developing electrically pumped polymer lasers.
    • The integrated gain medium and waveguide simplifies device design and enhances performance.