Laser wind velocimeter with multiple radiation sources
First Claim
1. A velocimeter comprising:
- a radiation source configured to produce a coherent radiation beam;
a modulating system comprising;
a plurality of modulators, wherein each of the plurality of modulators is configured to modulate the coherent radiation beam; and
a plurality of optical isolators, wherein each of the plurality of isolators is configured to provide unidirectional propagation of light in an optical fiber;
a plurality of transceiver modules comprising a plurality of transceivers, wherein each of the plurality of transceivers is configured to;
receive the modulated beam from the source;
transmit the modulated beam to a target region; and
receive a reflected signal from the target region;
a plurality of optical mixing systems, wherein each of the plurality of optical mixing systems comprises;
a plurality of optical mixers coupled to the plurality of transceivers, wherein each of the plurality of optical mixers is configured to;
receive a reference signal from the source and the reflected signal from the corresponding transceiver; and
determine a Doppler shift based on the reference signal from the source and the reflected signal from the corresponding transceiver.
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Accused Products
Abstract
A system and method for measuring wind velocities are provided. A laser wind velocimeter with a radiation source includes a fiber laser. 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 one or more transceivers transmit radiation to the target region. A portion of the reflected radiation collected by the receiving system is analyzed to determine the Doppler shift, which can me used to measure wind velocity.
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Citations
26 Claims
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1. A velocimeter comprising:
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a radiation source configured to produce a coherent radiation beam; a modulating system comprising; a plurality of modulators, wherein each of the plurality of modulators is configured to modulate the coherent radiation beam; and a plurality of optical isolators, wherein each of the plurality of isolators is configured to provide unidirectional propagation of light in an optical fiber; a plurality of transceiver modules comprising a plurality of transceivers, wherein each of the plurality of transceivers is configured to; receive the modulated beam from the source; transmit the modulated beam to a target region; and receive a reflected signal from the target region; a plurality of optical mixing systems, wherein each of the plurality of optical mixing systems comprises; a plurality of optical mixers coupled to the plurality of transceivers, wherein each of the plurality of optical mixers is configured to; receive a reference signal from the source and the reflected signal from the corresponding transceiver; and determine a Doppler shift based on the reference signal from the source and the reflected signal from the corresponding transceiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A velocimeter comprising:
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a plurality of laser sources configured to produce coherent radiation beams comprising a plurality of different frequencies; a modulating system comprising; a modulator configured to modulate respective ones of the coherent radiation beams; and an optical isolator configured to provide unidirectional propagation of light in an optical fiber; a transceiver module comprising a plurality of transceivers, wherein each of the plurality of transceivers is configured to; receive respective ones of the modulated beams from the source; transmit the respective ones of the modulated beams to a target region; and receive a reflected signal from the target region; an optical mixing system comprising; a plurality of optical mixers coupled to the plurality of transceivers, wherein each of the plurality of optical mixers is configured to; receive respective reference signals from the source and the reflected signal from the corresponding transceiver; and determine a Doppler shift based on the respective reference signal from the source and the reflected signal from the corresponding transceiver. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification