Technologies
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WARF: P05034US

Modeless Wavelength-Agile Laser


INVENTORS -

Scott Sanders

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing an easily constructed modeless laser with a rapidly sweeping color that results in improved performance in many sensing applications.
OVERVIEWSpectroscopic studies evaluate the response of a specimen to different colors of light. Lasers are normally used in spectroscopic studies; however, lasers typically operate in one or more cavity modes, which can result in “speckle,” where light from the laser constructively adds or destructively cancels at given points. Another related issue is “mode hopping,” where laser light at one color jumps to another, substantially different color instead of scanning smoothly through them.
THE INVENTIONA UW-Madison researcher has developed an easily constructed modeless laser with a rapidly sweeping color that results in improved performance in many sensing applications. The laser changes its cavity length at a speed that prevents the formation of modes, resulting in a spectrally narrow, swept-wavelength light source that eliminates mode hopping. A pivoting mirror design provides the high rate of cavity length change.
APPLICATIONS
  • Optical coherence tomography, a non-invasive technique used for high resolution, cross-sectional imaging and tissue characterization
  • Gas sensing, including measuring gas properties in engines
  • Many other rapid spectroscopic sensing applications
KEY BENEFITS
  • Modeless operation eliminates mode hopping and speckle.
  • Allows smoother and more reliable sweeping of light frequency with less variation in amplitude from scan to scan
  • Rapid sensing speed – up to once every 32 microseconds
  • Relatively simple to construct
  • Laser system may be implemented to produce variable wavelength scanning speeds.
Contact Information
For current licensing status, please contact Emily Bauer at emily@warf.org or 608-960-9842.
The WARF Advantage

Since its founding in 1925 as the patenting and licensing organization for the University of Wisconsin-Madison, WARF has been working with business and industry to transform university research into products that benefit society. WARF intellectual property managers and licensing staff members are leaders in the field of university-based technology transfer. They are familiar with the intricacies of patenting, have worked with researchers in relevant disciplines, understand industries and markets, and have negotiated innovative licensing strategies to meet the individual needs of business clients.