US3853384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transmission line
Assignee: AT&T Inc
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Filing: 1973-04-16
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Granted: 1974-12-10
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Expires: 1993-04-16
Abstract
Abstract Optical transmission line suitable for transmitting electromagnetic radiation within the visible spectrum and adjoining portions of the infrared and ultraviolet spectra consists of an alumina-doped borosilicate core and clad by an undoped borosilicate. Intrinsic insertion loss is lowered relative to a similar structure using undoped silica as the core material. Interfacial regions between core and clad may be sharply defined or graded.
Inventors
- 👤 D Pinnow
- 👤 Uitert L Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:57
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
195 words
A GLASS TRANSMISSION LINE FOR THE TRANSMISSION OF ELECTROMAGNETIC RADIATION WITHIN THE WAVELENGTH RANGE OF FROM 0.5 TO 2.0 UM, SAID LINE CONSISTING ESSENTIALLY OF A CORE MEMBER MANIFESTING A FIRST REFRACTIVE INDEX FOR SAID WAVE EBERGY AND A CLADDING ABOUT SAID CORE, SAID CLADDING INCLUDING AT LEAST ONE LAYER HAVING A SECOND REFRACTIVE INDEX FOR SAID WAVE ENERGY WHICH IS LOWER THAN SAID FIRST INDEX, SAID SECOND INDEX BEING OF A VALUE AT LEAST 0.1 PERCENT LOWER THAN SAID FIRST INDEX AT LEAST WITHIN A REGION IN THE NEIGHBORHOOD OF A PERIPHERY OF THE SAID CLADDING, IN WHICH SAID CORE AND SAID CLADDING ARE BOTH PRIMARILY A MIXED COMPOSITION OF B2O3 AND SIO2 WITH THE SIO2/B2O3 RATIO BEING WITHIN THE MOLE FRACTION RANGE OF FROM 30:1 TO 2:1 AND IN WHICH AT LEAST THE INNERMOST PORTION OF THE CIRE CIBTAUBS SYFFUCUEBT ADDUTUVE NATERUAK TI RESYKT UB A REFRACTIVE INDEX-INCREASE FOR A WAVELENGTH WITHIN THE SAID RANGE OF AT LEAST 0.1 PERCENT, SAID ADDITIVE BEING COMPLETELY DISSOLVED IN THE SAID MIXTURE AND HAVING AN INDEX WHICH IS A MIXIMUM OF 30 PERCENT GREATER THAN THAT OF THE SAID MIXTURE AS UNMODIFIED BY THE SAID ADDITIVE.
Claim 2
Dependent Claim
195 words
A GLASS TRANSMISSION LINE FOR THE TRANSMISSION OF ELECTROMAGNETIC RADIATION WITHIN THE WAVELENGTH RANGE OF FROM 0.5 TO 2.0 UM, SAID LINE CONSISTING ESSENTIALLY OF A CORE MEMBER MANIFESTING A FIRST REFRACTIVE INDEX FOR SAID WAVE EBERGY AND A CLADDING ABOUT SAID CORE, SAID CLADDING INCLUDING AT LEAST ONE LAYER HAVING A SECOND REFRACTIVE INDEX FOR SAID WAVE ENERGY WHICH IS LOWER THAN SAID FIRST INDEX, SAID SECOND INDEX BEING OF A VALUE AT LEAST 0.1 PERCENT LOWER THAN SAID FIRST INDEX AT LEAST WITHIN A REGION IN THE NEIGHBORHOOD OF A PERIPHERY OF THE SAID CLADDING, IN WHICH SAID CORE AND SAID CLADDING ARE BOTH PRIMARILY A MIXED COMPOSITION OF B2O3 AND SIO2 WITH THE SIO2/B2O3 RATIO BEING WITHIN THE MOLE FRACTION RANGE OF FROM 30:1 TO 2:1 AND IN WHICH AT LEAST THE INNERMOST PORTION OF THE CIRE CIBTAUBS SYFFUCUEBT ADDUTUVE NATERUAK TI RESYKT UB A REFRACTIVE INDEX-INCREASE FOR A WAVELENGTH WITHIN THE SAID RANGE OF AT LEAST 0.1 PERCENT, SAID ADDITIVE BEING COMPLETELY DISSOLVED IN THE SAID MIXTURE AND HAVING AN INDEX WHICH IS A MIXIMUM OF 30 PERCENT GREATER THAN THAT OF THE SAID MIXTURE AS UNMODIFIED BY THE SAID ADDITIVE.
Claim 3
Dependent Claim
49 words
Transmission line of claim 1 in which the said additive material consists essentially of Al2O3 and in which the content of said additive within the innermost portion of the core region is from within the range of 1 to 20 percent based on the entirety of the said mixture.
Claim 4
Dependent Claim
28 words
Transmission line of claim 2 in which the Al2O3 content in the said core region is from 1 to 20 percent by weight based on the said mixture.
Claim 5
Dependent Claim
28 words
Transmission line of claim 2 in which the Al2O3 content in the said core region is from 1 to 10 percent by weight based on the said mixture.
Claim 6
Dependent Claim
15 words
Transmission line of claim 1 in which the said ratio is from 20:1 to 4:1.
Claim 7
Dependent Claim
15 words
Transmission line of claim 5 in which the said ratio is from 20:1 to 6:1.
Claim 8
Dependent Claim
56 words
Transmission line of claim 1 in which the core diameter as defined by a core region consisting essentially of 99.8 percent by weight SiO2-B2O3-Al2O3 mixture with transItion metal ion impurities no greater than 10 4 percent and having a maximum refractive index variation of 0.01 percent is from 3 Mu m to 200 Mu m .
Claim 9
Dependent Claim
36 words
Transmission line of claim 7 in which the core diameter defining a region, the entirety of which contains Al2O3 in amount of at least 1 weight percent, is from 30 Mu m to 100 Mu m.
Claim 10
Dependent Claim
63 words
Transmission line of claim 7 in which the cladding thickness defined as the thickness of amorphous material, the composition of which is primarily SiO2/B2O3 mixture containing no greater than 1 weight percent Al2O3 but within which the refractive index as a differential value relative to the said core greater than the variations specified in claim 7 is from 10 to 250 Mu m.
Claim 11
Dependent Claim
19 words
Transmission line of claim 9 in which the cladding thickness as defined is from 25 to 100 Mu m.
Claim 12
Dependent Claim
23 words
Transmission line of claim 10 in which the core dimension is within the range of from 3 Mu m to 200 Mu m.
Claim 13
Dependent Claim
23 words
Transmission line of claim 1 in which the refractive index differential between the said region and the core is from 0.0001 to 0.10.
Claim 14
Dependent Claim
23 words
Transmission line of claim 12 in which the refractive index differential between the said region and the core is from 0.001 to 0.02.
Claim 15
Dependent Claim
20 words
Transmission line of claim 1 in which the refractive index of the cladding is substantially uniform in the radial direction.
Claim 16
Dependent Claim
29 words
Transmission line of claim 1 in which the refractive index of the said cladding is graded with the index decrease in the radial direction away from the said core.
Claim 17
Dependent Claim
31 words
Transmission line of claim 1 in which the glass transition temperature of the said cladding material is equal to or greater than the glass transition temperature of the said core material.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |