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Modulated Sine Waves for Differential Absorption Measurements Using a CW Laser SystemA continuous wave Light Detection and Ranging (CW LiDAR) system utilizes two or more laser frequencies and time or range shifted pseudorandom noise (PN) codes to discriminate between the laser frequencies. The performance of these codes can be improved by subtracting out the bias before processing. The CW LiDAR system may be mounted to an artificial satellite orbiting the earth, and the relative strength of the return signal for each frequency can be utilized to determine the concentration of selected gases or other substances in the atmosphere.
Document ID
20150016921
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Campbell, Joel F.
Lin, Bing
Nehrir, Amin R.
Date Acquired
September 2, 2015
Publication Date
August 4, 2015
Subject Category
Lasers And Masers
Report/Patent Number
Patent Application Number: US-Patent-Appl-SN-14/072,019
Patent Number: US-Patent-9,097,646
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-9,097,646
Patent Application
US-Patent-Appl-SN-14/072,019

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