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A low-threshold, high-efficiency microfluidic waveguide laser.

Dmitri V Vezenov1, Brian T Mayers, Richard S Conroy

  • 1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.

Journal of the American Chemical Society
|June 23, 2005
PubMed
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Researchers developed a novel laser-pumped liquid waveguide laser for microfluidics. This tunable light source offers a low lasing threshold and high slope efficiency, ideal for various applications.

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Microfluidics

Background:

  • Liquid waveguide lasers offer potential for tunable light sources.
  • Microfluidic applications require compact and efficient optical devices.

Purpose of the Study:

  • To develop a simple, high-intensity, tunable light source for microfluidic applications.
  • To characterize the performance of a laser-pumped liquid core-liquid cladding (L2) waveguide laser.

Main Methods:

  • Fabrication of a 1 cm long L2 waveguide laser.
  • Optical pumping using a frequency-doubled Nd:YAG laser.
  • Tuning of output wavelength by adjusting solvent ratios (DMSO/methanol) in the liquid core.

Main Results:

Related Experiment Videos

  • Achieved a low lasing threshold of 22 μJ (16-ns pulse length).
  • Observed a slope efficiency up to 20%.
  • Demonstrated wavelength tunability over a 20-nm range.

    • Conclusions:

    • The developed liquid waveguide laser is a simple and effective tunable light source.
    • The device shows promise for integration into microfluidic systems.
    • Low threshold and high efficiency make it suitable for demanding applications.