Go to Top
INVENTOR LOGIN

Details

Project TitleWidely Tunable Optically Pumped Mid-IR DFB Laser
Track Code2012-102
Short Description

Researchers at the University of New Mexico have expanded upon the use of chirped grating systems to allow for the formation of a high-power, optically-pumped, tunable mid-IR laser.

Abstract

Chirped gratings are fabricated on the top surfaces of the target substrate, in a longitudinal orientation by translating the pump region up and down to tune the appropriate wavelengths that will be reflected/ transmitted. This form of grating allows for tuning over a wider spectrum. The grating underlying this innovation is achieved through the use of interferometric lithography (IL), where the intensity variation achieved at the point of intersection of two coherent light beams can be used to form grating patterns on a photoresist film, and by controlling the wavefront using a lens system, chirped versus uniform grating can be realized. Once the procedures to finish creation of the distributed feedback (DFB) laser have been completed, the end product is able to operate stably with successful suppression of F-P nodes, and provide continuous tuning over extended wavelength ranges in an extremely robust package.

 
Tagslasers, infrared spectroscopy
 
Posted DateJun 10, 2014

People

Name
Jovan Heusser

Researcher

Name
Steven Brueck
Xiang He
Steve Benoit

Manager

Name
Briana Wobbe

Background

The availability of high spectroscopic quality, compact, robust, semiconductor-based tunable lasers that cover the mid-IR would provide enhanced capabilities for gas sensors, with many applications, both defense and commercial. Optically pumped, high-power semiconductor laser sources have been developed for non-spectroscopic  for some military applications. Such uses, however, require high-beam quality and only coarse wavelength control. In contrast, to be used for spectroscopic applications, the spectral quality and agility of these optically-pumped lasers must be improved.

Technology Description

Researchers at the University of New Mexico have expanded upon the use of chirped grating systems to allow for the formation of a high-power, optically-pumped, tunable mid-IR laser. Chirped gratings are fabricated on the top surfaces of the target substrate, in a longitudinal orientation by translating the pump region up and down to tune the appropriate wavelengths that will be reflected/ transmitted. This form of grating allows for tuning over a wider spectrum. The grating underlying this innovation is achieved through the use of interferometric lithography (IL), where the intensity variation achieved at the point of intersection of two coherent light beams can be used to form grating patterns on a photoresist film, and by controlling the wavefront using a lens system, chirped versus uniform grating can be realized. Once the procedures to finish creation of the distributed feedback (DFB) laser have been completed, the end product is able to operate stably with successful suppression of F-P nodes, and provide continuous tuning over extended wavelength ranges in an extremely robust package. This is in contrast to traditional tunable laser sources that require vibration-sensitive external cavities, or multiple active areas with a combination of tuning mechanisms.

Advantages/Applications

  • Successful suppression of F-P modes
  • There is improved mode quality and brightness of laser due to optical pumping
  • Utilized chirped grating to allow for single-mode operation and single-knob, continuous tuning
  • High level of tunability
  • Allows for spectroscopic applications of DFB lasers

Publications

INQUIRES

STC has filed intellectual property on this exciting new technology and is currently exploring commercialization options. If you are interested in information about this or other technologies, please contact Arlene Mirabal at amirabal@stc.unm.edu or 505-272-7886.

Files

File Name Description
9,431,789 Issued Patent None Download
8,908,724 Issued Patent None Download

Intellectual Property

Patent Number Issue Date Type Country of Filing
9,431,789 Aug 30, 2016 Divisional United States
8,908,724 Dec 9, 2014 Utility United States