Laser doppler velocimeter

A laser Doppler, velocimeter technology, used in fluid velocity measurement, velocity/acceleration/shock measurement, devices using optical methods, etc., can solve problems such as high optical power limitations
CN102016601AInactive Publication Date: 2011-04-13OPTICAL AIR DATA SYST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
OPTICAL AIR DATA SYST
Publication Date
2011-04-13
Estimated Expiration
Not applicable · inactive patent

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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.
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Description

technical field

[0001] The present invention relates to laser Doppler velocimeters, and more particularly to laser Doppler velocimeters for measuring the velocity of wind or solid objects while compensating for motion of the laser Doppler velocimeter platform. Background technique

[0002] A conventional laser Doppler velocimeter ("LDV") transmits light to a target region (eg, into the atmosphere) and receives a portion of that light after it has been scattered or reflected from the target region or scatterers in the target region. The received light is processed by LDV to obtain the Doppler shift f D . Then LDV passes the relation v=(0.5)cf D / f t The velocity v of the teleportation target relative to the LDV, where f t is the frequency of the transmitted light, and c is the velocity of light in the medium between the LDV and the target.

[0003] LDVs are very useful and have a wide range of applications including, but not limited to: blood flow measurement, speed limi...

Claims

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