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MHz-rate Nonlinear Spectroscopy and Imaging Platform for Transient and Nonequilibrium Flows

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-16-C-2716
Agency Tracking Number: F15A-T20-0183
Amount: $749,815.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: AF15-AT20
Solicitation Number: 2015.0
Solicitation Year: 2015
Award Year: 2016
Award Start Date (Proposal Award Date): 2016-08-31
Award End Date (Contract End Date): 2018-11-30
Small Business Information
5100 Springfield Street
Dayton, OH 45431
United States
DUNS: 782766831
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Dr. Sukesh Roy
 (937) 902-6546
Business Contact
 Dr. Sivaram Gogineni
Phone: (937) 256-7733
Research Institution
 Purdue University
 Prof. Terrence Meyer
585 Purdue Mall
West Lafayette, IN 47907
United States

 (765) 494-2133
 Nonprofit College or University

The goal of the proposed work is to demonstrate 100 kHz to MHz rate nonlinear spectroscopy for measurements of molecular energy distributions, energy transfer, major species, and temperature in transient combusting and nonequilibrium flows. This will be accomplished, in part, by extending burst-mode laser technology to the fs/ps regime for three-orders of magnitude higher probe-pulse energy at MHz repetition rates. This laser architecture will also ensure precise synchronization of transform-limited fs and ps pulses for efficient coherent excitation of multi-photon transitions while minimizing interferences such as nonresonant background and collisions. During the Phase I, we investigated the optimal laser architecture for fs/ps burst-mode laser spectroscopy and demonstrated potential spectroscopic and imaging systems using high-speed ps coherent anti-Stokes Raman scattering (CARS) as a test platform. A model was developed and shows that the prototype design planned for the Phase II will achieve the desired goals. The Phase II will result in a prototype 100 kHz to MHz rate nonlinear spectroscopy system and demonstration in Air Force relevant conditions. This research program will result in commercial laser spectroscopy and imaging systems that will address critical research needs in areas such as advanced propulsion, munitions, space vehicles, and related industries.

* Information listed above is at the time of submission. *

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