US4468294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic desensitization of optical fibers by means of nickel jackets
Assignee: Honeywell Inc
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Filing: 1983-05-19
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Granted: 1984-08-28
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Expires: 2003-05-19
Abstract
Abstract In the field of fiber optic acoustic sensors, a method for acoustic desensitization of certain sections of optic fibers by means of the use of higher elastic modulus coatings, such as an electrodeposited nickel jacket.
Inventors
- 👤 G. Benjamin Hocker
- 👤 John D. Skogen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:46
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C03C25/1061; C03C25/1063; C23; C23C; C23C28/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
A method for acoustic desensitization of selected portions of an acoustically sensitive optic fiber hydrophone by fabricating a nickel coated optic fiber comprising the steps of: providing an extended length of acoustically responsive optic fiber hydrophone; depositing an electrically conductive undercoating on and along at least a selected portion of said length of optic fiber hydrophone; and, determining the thickness of nickel layer required to achieve acoustic desensitization of the coated portion of the optic fiber and electroplating a layer of nickel over said undercoated optic fiber portion of a sufficient thickness of said nickel layer to effect acoustic desensitization of said optic fiber portion.
Claim 2
Independent Claim
105 words
A method for acoustic desensitization of selected portions of an acoustically sensitive optic fiber hydrophone by fabricating a nickel coated optic fiber comprising the steps of: providing an extended length of acoustically responsive optic fiber hydrophone; depositing an electrically conductive undercoating on and along at least a selected portion of said length of optic fiber hydrophone; and, determining the thickness of nickel layer required to achieve acoustic desensitization of the coated portion of the optic fiber and electroplating a layer of nickel over said undercoated optic fiber portion of a sufficient thickness of said nickel layer to effect acoustic desensitization of said optic fiber portion.
Claim 3
Dependent Claim
30 words
The method according to claim 1 wherein the thickness of the electroplated nickel is in the range of about 10% to about 30% of the diameter of the optic fiber.
Claim 4
Dependent Claim
32 words
The method according to claim 2 wherein the fiber diameter is on the order of 100 μm and wherein the electroplated nickel thickness is on the order of 10 to 30 μm.
Claim 5
Dependent Claim
13 words
The method according to claim 1 in which the undercoating is metal film.
Claim 6
Dependent Claim
16 words
The method according to claim 4 in which the metal film is sputtered on the fiber.
Claim 7
Dependent Claim
21 words
The method according to claim 5 in which the sputtered metal fiber comprises sputtered copper with an undercoating of sputtered chromium.
Claim 8
Independent Claim
121 words
A method for acoustic desensitization of selected portions of an acoustically sensitive optic fiber hydrophone by fabricating a nickel coated optic fiber comprising the steps of: providing an extended length of acoustically responsive optic fiber hydrophone; depositing an adhesive undercoating of chromium on and along at least a selected portion of said length of optic fiber hydrophone; depositing an electrically conductive undercoating of copper over said chromium on said selected portion of said length of optic fiber hydrophone; and, determining the thickness of nickel layer required to achieve acoustic desensitization of the coated portion of the optic fiber and electroplating a layer of nickel over said undercoated optic fiber of a sufficient thickness to achieve acoustic desensitization of said optic fiber.
Claim 9
Independent Claim
121 words
A method for acoustic desensitization of selected portions of an acoustically sensitive optic fiber hydrophone by fabricating a nickel coated optic fiber comprising the steps of: providing an extended length of acoustically responsive optic fiber hydrophone; depositing an adhesive undercoating of chromium on and along at least a selected portion of said length of optic fiber hydrophone; depositing an electrically conductive undercoating of copper over said chromium on said selected portion of said length of optic fiber hydrophone; and, determining the thickness of nickel layer required to achieve acoustic desensitization of the coated portion of the optic fiber and electroplating a layer of nickel over said undercoated optic fiber of a sufficient thickness to achieve acoustic desensitization of said optic fiber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |