US5838859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional optical transceiver assembly
Assignee: Avago Technologies International Sales Pte Ltd
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Filing: 1996-11-25
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Granted: 1998-11-17
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Expires: 2016-11-25
Abstract
Abstract An optical transceiver assembly for use in a bidirectional system includes a beam splitter to direct an incoming signal to a photodiode. An outgoing signal from a laser diode is partially transmitted and partially reflected by the splitter. The reflected signal, which may reach the photodiode, constitutes crosstalk which is reduced by orienting the polarization direction of the splitter essentially parallel to that of the outgoing signal from the laser diode. In another embodiment, which enhances coupling efficiency, a single element asphere lens is positioned between the laser diode and the splitter.
Inventors
- 👤 Timothy Butrie
- 👤 Shigemasa Enoeda
- 👤 Joseph Edward Riska
- 👤 Stephen James Salko
- 👤 Thomas Stanley Stakelon
- 👤 Alka Swanson
- 👤 Toshimichi Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:37
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4246; G02B6/4204; G02B6/4207
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
An optical transceiver assembly comprising a housing, mounted in said housing, a plane polarized light source, a pane polarized beam splitter, an optical fiber, a photodetector, and a lens for focusing an outgoing optical signal from said source through said splitter into said fiber, said splitter being positioned to reflect an incoming optical signal on said fiber to said photodetector, CHARACTERIZED IN THAT said splitter is a non-birefringent device, and the polarization orientation of said splitter is essentially parallel to that of said plane polarized light source.
Claim 2
Dependent Claim
87 words
An optical transceiver assembly comprising a housing, mounted in said housing, a plane polarized light source, a pane polarized beam splitter, an optical fiber, a photodetector, and a lens for focusing an outgoing optical signal from said source through said splitter into said fiber, said splitter being positioned to reflect an incoming optical signal on said fiber to said photodetector, CHARACTERIZED IN THAT said splitter is a non-birefringent device, and the polarization orientation of said splitter is essentially parallel to that of said plane polarized light source.
Claim 3
Dependent Claim
21 words
The assembly of claim 1 further characterized in that said source comprises a laser diode having a plane polarized light output.
Claim 4
Dependent Claim
16 words
The assembly of claim 1 further characterized in that said lens comprises a single asphere lens.
Claim 5
Dependent Claim
118 words
An optical transceiver assembly comprising a housing, mounted in said housing, a plane polarized laser diode, a plane polarized beam splitter, an optical fiber, a photodetector, and a single asphere lens for focusing an outgoing optical signal from said source through said splitter into said fiber, said splitter being positioned to reflect an incoming optical signal on said fiber to said photodetector, said source and said splitter being disposed along a first axis and said photodetector and said splitter being disposed along a second axis essentially perpendicular to said first axis, CHARACTERIZED IN THAT said splitter is a non-birefringent device, and the polarization orientation of said splitter is essentially parallel to that of said plane polarized laser diode.
Claim 6
Dependent Claim
118 words
An optical transceiver assembly comprising a housing, mounted in said housing, a plane polarized laser diode, a plane polarized beam splitter, an optical fiber, a photodetector, and a single asphere lens for focusing an outgoing optical signal from said source through said splitter into said fiber, said splitter being positioned to reflect an incoming optical signal on said fiber to said photodetector, said source and said splitter being disposed along a first axis and said photodetector and said splitter being disposed along a second axis essentially perpendicular to said first axis, CHARACTERIZED IN THAT said splitter is a non-birefringent device, and the polarization orientation of said splitter is essentially parallel to that of said plane polarized laser diode.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-11-16 | 2002-05-18 | 2002-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-16 | 2006-05-18 | 2006-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-16 | 2010-05-18 | 2010-11-17 | $7700.00 | Window Closed / Lapsed |