Mid-infrared Laser Based on Cascaded Raman Wavelength Shifting in Fibers

Award Information
Agency:
Department of Defense
Amount:
$100,000.00
Program:
STTR
Contract:
W911NF-04-C-0078
Solitcitation Year:
2004
Solicitation Number:
N/A
Branch:
Army
Award Year:
2004
Phase:
Phase I
Agency Tracking Number:
A045-012-0043
Solicitation Topic Code:
A04-T012
Small Business Information
OMNI SCIENCES, INC.
647 Spring Valley Drive, Ann Arbor, MI, 48105
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
149279015
Principal Investigator
 Michael Freeman
 Director of Research
 (734) 420-0190
 mikefreeman@voyager.net
Business Contact
 Michael Freeman
Title: Director of Research
Phone: (734) 420-0190
Email: mikefreeman@voyager.net
Research Institution
 University of Michigan
 Mohammed N Islam
 Elect. Eng. and Comp. Sci., 1301 Beal Avenue, 1110 EECS
Ann Arbor, MI, 48109
 (734) 647-9700
 Nonprofit college or university
Abstract
Spectral fingerprinting for chemical agent detection or industrial process and analytic chemistry requires a compact, lightweight, tunable mid-infrared (mid-IR) laser. A room temperature, fiber-based mid-IR laser is proposed that starts with a pump laser in the near-IR, and then down-shifts the light based on cascaded Raman wavelength shifting in mid-IR fibers. The laser is widely tunable by simply tuning a seed semiconductor laser, and the power can be scaled up to watts by using larger core size fibers. The mid-IR laser leverages the mature technology base from telecommunications, where our team has considerable experience on Raman technology. We use simulation codes carefully tested in near-IR wavelengths to design the proposed mid-IR lasers, and we show that the Raman wavelength shifting process is extremely efficient. New technical challenges arise from using mid-IR fibers based on chalcogenides or fluorides, but these should be engineering challenges rather than fundamental limitations. The Phase I project has three main objectives. First, prove the accuracy of the simulations and better understand the properties of the mid-IR fibers. Second, demonstrate experimentally cascaded Raman wavelength shifting in the mid-IR fibers. Finally, generate light in the 3-5 micron wavelength range using off-the-shelf telecom technologies and mid-IR fibers.

* information listed above is at the time of submission.

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