US5221860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed laser package
Assignee: Nokia Bell Labs
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Filing: 1991-02-19
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Granted: 1993-06-22
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Expires: 2011-02-19
Abstract
Abstract An optical package for use with a laser diode in high speed applications. The package comprises a metallic housing with a multilayer ceramic (MLC) insert disposed through a sidewall thereof. The MLC insert is utilized to form a microstrip transmission line of a bandwidth sufficient to couple a high frequency signal source to the laser. A number of conductive vias are disposed through the thickness of the MLC insert at the package wall to serve as electric field shorts within the insert and improve the frequency response of the microstrip. A pair of such MLC inserts may be disposed through opposing sidewalls of the package and used to provide a conventional "butterfly" configuration, while preserving the integrity of the microstrip interconnection.
Inventors
- 👤 Norman R. Dietrich
- 👤 Palmer D. Smeltz, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:43
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/022; H01S5/02208; H01S5/02216; H01S5/04; H01S5/042; H01S5/06; H01S5/062; H01S5/06226
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
An optical package comprising a metallic body including opposing metallic sidewalls; a multilayer ceramic insert disposed through a metallic sidewall of said metallic body such that a first end of said insert is positioned inside said package and a second, opposite end is positioned outside said package, the multilayer ceramic insert including a microstrip transmission line for coupling, at said first end, to an active optical device and coupling, at said second end, to an external signal source; and shorting means disposed through the thickness of the multilayer ceramic insert and coupled to the metallic body for terminating any electric field present within the package.
Claim 2
Dependent Claim
105 words
An optical package comprising a metallic body including opposing metallic sidewalls; a multilayer ceramic insert disposed through a metallic sidewall of said metallic body such that a first end of said insert is positioned inside said package and a second, opposite end is positioned outside said package, the multilayer ceramic insert including a microstrip transmission line for coupling, at said first end, to an active optical device and coupling, at said second end, to an external signal source; and shorting means disposed through the thickness of the multilayer ceramic insert and coupled to the metallic body for terminating any electric field present within the package.
Claim 3
Dependent Claim
20 words
An optical package as defined in claim 1 wherein the shorting means is positioned separated from the metallic body sidewall.
Claim 4
Dependent Claim
33 words
An optical package as defined in claim 1 wherein the shorting means comprises at least one conductive via disposed through the thickness of the multilayer ceramic so as to contact the metallic body.
Claim 5
Dependent Claim
21 words
An optical package as defined in claim 3 wherein the at least one conductive via comprises a plurality of conductive vias.
Claim 6
Dependent Claim
17 words
An optical package as defined in claim 3 wherein the at least one conductive via comprises tungsten.
Claim 7
Dependent Claim
20 words
An optical package as defined in claim 1 wherein the metallic body comprises a combination of nickel, iron and copper.
Claim 8
Dependent Claim
41 words
An optical package as defined in claim 1 wherein the multilayer ceramic insert further comprises a metallic layer formed around the perimeter of the insert, wherein the insert is brazed to said metallic sidewall so as to form a hermetic structure.
Claim 9
Dependent Claim
24 words
An optical package as defined in claim 1 wherein the package further comprises a second multilayer ceramic insert disposed through an opposing metallic sidewall.
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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) | 1996-06-21 | 1996-12-21 | 1997-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-21 | 2000-12-21 | 2001-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-21 | 2004-12-21 | 2005-06-22 | $7700.00 | Window Closed / Lapsed |