Patent US4639078A successfully refreshed from Google Patents.
US4639078A
Expired / Lapsed
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Optical fiber attenuator and method of fabrication
Assignee: Boeing North American Inc
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Filing: 1984-10-05
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Granted: 1987-01-27
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Expires: 2004-10-05
Abstract
Abstract An optical fiber attenuator is fabricated using an adhesive liquid including submicron light absorbing particles. A portion at the end of a first optical fiber is coated with the liquid. The liquid is spread about the surface of the end of the fiber, as by ultrasonic vibration, to provide a uniform and very thin coat on the fiber. Then the first fiber is spliced at the coated end to an end of a second optical fiber.
Inventors
- 👤 Sang K. Sheem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B6/00; G02B6/24; G02B6/26; G02B6/264; G02B6/266
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
The method of making an optical fiber attenuator comprising the steps of: coating a portion of a first optical fiber, including an end thereof, with a liquid which includes an adhesive and submicron light absorbing particles; ultrasonically spreading said liquid about the surface of said fiber portion so as to achieve a substantially uniform coat of said liquid on said portion; curing said coat; testing the attenuation provided by said coat; and splicing said first fiber at said end to an end of a second optical fiber.
Claim 2
Independent Claim
87 words
The method of making an optical fiber attenuator comprising the steps of: coating a portion of a first optical fiber, including an end thereof, with a liquid which includes an adhesive and submicron light absorbing particles; ultrasonically spreading said liquid about the surface of said fiber portion so as to achieve a substantially uniform coat of said liquid on said portion; curing said coat; testing the attenuation provided by said coat; and splicing said first fiber at said end to an end of a second optical fiber.
Claim 3
Independent Claim
93 words
The method of making an optical fiber attenuator comprising the steps of: coating a portion of a first optical fiber, including an end thereof, with a liquid which includes an adhesive and submicron light absorbing particles; ultrasonically spreading said liquid about the surface of said fiber portion so as to achieve a substantially uniform coat of said liquid approximately 5 microns thick or less on said portion; curing said coat; testing the attenuation provided by said coat; and splicing said first fiber at said end to an end of a second optical fiber.
Claim 4
Independent Claim
93 words
The method of making an optical fiber attenuator comprising the steps of: coating a portion of a first optical fiber, including an end thereof, with a liquid which includes an adhesive and submicron light absorbing particles; ultrasonically spreading said liquid about the surface of said fiber portion so as to achieve a substantially uniform coat of said liquid approximately 5 microns thick or less on said portion; curing said coat; testing the attenuation provided by said coat; and splicing said first fiber at said end to an end of a second optical fiber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |