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RAP opportunity at Air Force Science and Technology Fellowship Program     AF STFP

Research in Novel Hybrid Gas Laser Technology and Atmospheric Propagation


Directed Energy Directorate, RD/Physical Sciences

opportunity location
13.10.02.C0030 Kirtland Air Force Base, NM 871175776


name email phone
David A Hostutler 505-846-5162


Although gas lasers have been developed since the 1960s, there was a lull in in the pace of new concepts that began at the turn of the century as solid state lasers such as fiber and thin disk based systems came into vogue. However, the last decade has seen an uptick in new concepts, such as gas filled hollow core fiber lasers and optically pumped metastable noble gas lasers. A common driving force behind many of these new variants is the fruition of diode lasers at novel wavelengths and increasing powers. Research under this topic will focus on understanding the underlying physics of these new lasers.

A wide variety of experiments will be pursued to assess the potential for scaling new laser concepts. Researchers will have the opportunity to develop demonstrator lasers for feasibility studies as well as conduct more fundamental research including energy transfer mechanisms and measuring pressure broadening and shift rates. A variety of spectroscopic techniques, including tunable diode laser absorption spectroscopy and laser induced fluorescence, are currently being used but building and using new diagnostic tools such as Raman spectroscopy is also of interest. Experimental research is complimented by strong ongoing modeling and simulation efforts in the group. It is highly encouraged that researchers include an M&S focus within their research.

Specific topics of interest are: (1) understanding the energy transfer dynamics of gas filled hollow core fiber lasers, which includes measuring rotational and vibrational energy transfer rates, as well as collisional deactivation rates of the molecules of the fiber walls; (2) understanding time dependent temperature dynamic of these systems.

As laser systems mature and are being looked at for outdoor applications such as laser communications, there needs to be a systematic evaluation of their expected propgation characteristics.  There is a wealth of aerosol characterization data avaialble for most regions thourghout the world.  However diagnotics designed to understand absorption and scattering propoerties are centered in the UV-VIS wavelengths.    We are interested in 1) collecting data on absorption, scattering, extinction of aerosols at wavelengths a 1um-5um in different regions of the US including AK. 2) characterizing the chemical composition of aersols at different regions and 3) developing diagnostics that can quickly and accuratelt predict atmospheric propagation at a variety of wavlengths fomr 1-5um. 



Dadashzadeh N, Thirugnanasambandam M, Weerasinghe K, Debord B, Chafer M, Gérôme F, Benabid F, Washburn B, Corwin KL: "Near-Gaussian Spatial Mode from a Mid-IR Acetylene-filled Hollow-Core Fiber Laser". Frontiers in Optics 2016. OSA Technical Digest (online) (Optical Society of America, 2016), paper FTu1I.5

Wellegehausen B, Luhs W: “Diode-pumped CW molecular lasers”. Applied Physics B 122: 133, 2016


key words
Hollow core fiber; Gas laser; Spectroscopy; Kinetics; Atmospheric Characterization


Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants


Base Stipend Travel Allotment Supplementation
$95,000.00 $5,000.00

Experience Supplement:
Postdoctoral and Senior Associates will receive an appropriately higher stipend based on the number of years of experience past their PhD.

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