Optical Line Filter and Spectrometer based Upon Two-Photon Absorption for Doppler LIDAR at 1.053 um

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: 80NSSC18P2025
Agency Tracking Number: 187493
Amount: $102,134.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: S1
Solicitation Number: SBIR_18_P1
Timeline
Solicitation Year: 2018
Award Year: 2018
Award Start Date (Proposal Award Date): 2018-07-27
Award End Date (Contract End Date): 2019-02-15
Small Business Information
7549 Gold Dr, Reno, NV, 89506-5797
DUNS: 080945134
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Joe Vance
 Owner EspyLux LLC
 (775) 420-1038
 citruslaser@gmail.com
Business Contact
 Joseph Vance
Phone: (775) 420-1038
Email: citruslaser@gmail.com
Research Institution
N/A
Abstract

A receiver system for use in LIDAR consisting of an optical filter and optical spectrometer based upon two-photon absorption is proposed.  The filter and spectrometer both use dispersion from excited state transitions of atomic rubidium  to create a birefringent medium. The birefringent medium of the optical filter rotates the polarization of light so that it is transmitted through crossed polarizers. The birefringent medium of the spectrometer rotates the polarization of light an amount dependent upon frequency so that Doppler shift can be determined. The wavelength of operation is at 1.530 um which coincides with both the H atmospheric transmission band, and high power C-band transmitters. Since the spectrometer utilizes dispersion rather than absorption to determine frequency, there is no absorption line attenuation of the signal. With a high performance filter and spectrometer, the principle disadvantage of direct detection compared to coherent detection is mitigated. The strength of this method is that superior spatial resolution of wind, on the order of a decade, is attainable compared to coherent detection.  Operating at an eye-safe wavelength, a LIDAR using the proposed receiver would bring increased detection capability of wind shear and turbulence.

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

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