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

Metadata Updated: February 28, 2019

A receiver system for use in LIDAR consisting of an optical filter and optical spectrometer based upon two-photon absorption is proposed. [HTML_REMOVED]The filter and spectrometer both use dispersion from excited state transitions of atomic rubidium [HTML_REMOVED]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. [HTML_REMOVED]Operating at an eye-safe wavelength, a LIDAR using the proposed receiver would bring increased detection capability of wind shear and turbulence.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date February 28, 2019
Metadata Updated Date February 28, 2019

Metadata Source

Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date February 28, 2019
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_94700
Maintainer
TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 0c84898b-2596-4560-9dfc-c3fd56f3caa9
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2019-01-01
Homepage URL https://techport.nasa.gov/view/94700
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-09-07
Program Code 026:027
Source Datajson Identifier True
Source Hash fb228c5bd051b00fff7b0a9ac5be28f0e2be395e
Source Schema Version 1.1

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