US4976507A
Expired / Lapsed
US
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Sagnac distributed sensor
Assignee: McDonnell Douglas Corp
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Filing: 1989-09-22
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Granted: 1990-12-11
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Expires: 2009-09-22
Abstract
Abstract A system based on the usage of a Sagnac interferometer operating in a dual sensing mode is described which allows the determination of the location and amplitude of a time varying disturbance on a single fiber.
Inventors
- 👤 Eric Udd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:57
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/353; G01D5/35383; G01H; G01H9/00; G01H9/004
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A frequency shifter switch comprising: transduction means for admitting light and acoustically shifting the frequency of said admitted light wherein said transduction means further comprises: a TeO 2 crystal; and, a LiNbO 3 piezoelectric transducer attached to said TeO 2 crystal; and, optical coupling means for receiving and transmitting both frequency shifted and non-frequency shifted light.
Claim 2
Dependent Claim
56 words
A frequency shifter switch comprising: transduction means for admitting light and acoustically shifting the frequency of said admitted light wherein said transduction means further comprises: a TeO 2 crystal; and, a LiNbO 3 piezoelectric transducer attached to said TeO 2 crystal; and, optical coupling means for receiving and transmitting both frequency shifted and non-frequency shifted light.
Claim 3
Dependent Claim
115 words
A frequency shifter switch comprising: transduction means for admitting light and acoustically shifting the frequency of said admitted light; and, optical coupling means for receiving and transmitting both frequency shifted and non-frequency shifted light wherein said optical coupling means further comprises: a first lens adjacent said transduction means, and generally linearly oriented to receive said non-frequency shifted admitted light; a second lens adjacent said transduction means, and generally linearly oriented to receive said frequency shifted admitted light; and an optic coupler having a first input optically connected to said first lens, a second input optically connected to said second lens, and at least one output for transmitting light from said first and said second lenses.
Claim 4
Dependent Claim
115 words
A frequency shifter switch comprising: transduction means for admitting light and acoustically shifting the frequency of said admitted light; and, optical coupling means for receiving and transmitting both frequency shifted and non-frequency shifted light wherein said optical coupling means further comprises: a first lens adjacent said transduction means, and generally linearly oriented to receive said non-frequency shifted admitted light; a second lens adjacent said transduction means, and generally linearly oriented to receive said frequency shifted admitted light; and an optic coupler having a first input optically connected to said first lens, a second input optically connected to said second lens, and at least one output for transmitting light from said first and said second lenses.
Claim 5
Dependent Claim
29 words
The frequency shifter switch of claim 2 wherein said transduction means further comprises: a TeO 2 crystal; and. a LiNbO 3 piezoelectric transducer attached to said TeO 2 crystal.
Claim 6
Dependent Claim
122 words
A frequency shifter switch comprising: transduction means for admitting light and acoustically shifting the frequency of said admitted light; and optical coupling means for receiving and transmitting both frequency shifted and non-frequency shifted light wherein said optical coupling means further comprises: a lens adjacent said transduction means, and generally linearly oriented to receive light passing through said transduction means; a mechanical actuator, movably supporting said lens such that when said transducer produces non-frequency shifted light, said mechanical actuator means said lens in a position to capture said non-frequency shifted light, and when said transducer produces frequency shifted light, said mechanical actuator moves said lens in a position to capture said frequency shifted light; and, an optic fiber optically connected to said lens.
Claim 7
Dependent Claim
122 words
A frequency shifter switch comprising: transduction means for admitting light and acoustically shifting the frequency of said admitted light; and optical coupling means for receiving and transmitting both frequency shifted and non-frequency shifted light wherein said optical coupling means further comprises: a lens adjacent said transduction means, and generally linearly oriented to receive light passing through said transduction means; a mechanical actuator, movably supporting said lens such that when said transducer produces non-frequency shifted light, said mechanical actuator means said lens in a position to capture said non-frequency shifted light, and when said transducer produces frequency shifted light, said mechanical actuator moves said lens in a position to capture said frequency shifted light; and, an optic fiber optically connected to said lens.
Claim 8
Dependent Claim
29 words
The frequency shifter switch of claim 4 wherein said transduction means further comprises: a TeO 2 crystal; and, a LiNbO 3 piezoelectric transducer attached to said TeO 2 crystal.
Claim 9
Dependent Claim
109 words
A frequency shifter switch comprising: a first lens adjacent said transduction means, and generally linearly oriented to transmit light; transduction means for admitting said transmitted light and acoustically shifting the frequency of said admitted light; a second lens adjacent said transduction means, and generally linearly oriented to receive said non-frequency shifted admitted light; a third lens adjacent said transduction means, and generally linearly oriented to receive said frequency shifted admitted light; and, an optic coupler having a first input optically connected to said second lens, a second input optically connected to said third lens, and at least one output for transmitting light from said first and said second lenses.
Claim 10
Dependent Claim
109 words
A frequency shifter switch comprising: a first lens adjacent said transduction means, and generally linearly oriented to transmit light; transduction means for admitting said transmitted light and acoustically shifting the frequency of said admitted light; a second lens adjacent said transduction means, and generally linearly oriented to receive said non-frequency shifted admitted light; a third lens adjacent said transduction means, and generally linearly oriented to receive said frequency shifted admitted light; and, an optic coupler having a first input optically connected to said second lens, a second input optically connected to said third lens, and at least one output for transmitting light from said first and said second lenses.
References Cited (Backward Citations)
US4735485A
Cited
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Cited
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