Phillip D Rogers

US Patent:

8508722, Aug 13, 2013

Filed:

Apr 30, 2008

Appl. No.:

12/988248

Inventors:

Phillip L. Rogers - Hume VA, US
Chia Chen Chang - Rockville MD, US
Priyavadan Mamidipudi - Bristow VA, US
Lance Leclair - Manassas VA, US
Peter Gatchell - Nokesville VA, US
Daniel Dakin - Great Falls VA, US
Elizabeth Dakin - Great Falls VA, US

Assignee:

Optical Air Data Systems, LLC - Manassas VA

International Classification:

G01P 3/36

US Classification:

356 28, 356 285

Abstract:

A laser Doppler velocimeter is formed using a fiber laser as the lasing medium. Within the velocimeter, all optical signals, transmitted and received, are conveyed by optical fibers. An amplifier amplifies a source laser, which is then transmitted to one or more transceivers. The one or more transceivers, each projecting along a different axis, and each with a single optical fiber input/output interface act as both the transmission device to focus the radiation at a target region, and as the receiving system for collecting reflected radiation. The transceivers each include an amplifier to further amplify the radiation received from the laser source. The one or more transceivers transmit radiation simultaneously to the target region, and may be located remotely from the laser source. The portion of the reflected radiation collected by the receiving system is analyzed to determine the Doppler shift caused by targets at the focal point of the one or more transceivers.