US5475771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarization splitter haivng an anisotropic optical waveguide
Assignee: NEC Corp
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Filing: 1994-04-01
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Granted: 1995-12-12
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Expires: 2014-04-01
Abstract
Abstract A polarization splitter comprises an optical waveguide formed on a substrate and having an S-shaped curve portion, for permitting propagation of two linearly polarized lights orthogonal to each other therethrough, and an anisotropic optical waveguide branching from the beginning of the S-shaped curve portion, into which is guided one of the two linearly polarized lights alone.
Inventors
- 👤 Toru Hosoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:17
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/126
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
75 words
A polarization splitter comprising: an optical waveguide formed on a dielectric substrate and having an S-shaped curve portion, for permitting propagation of a linearly polarized light having electric field components vertical or horizontal to said substrate; and an anisotropic optical waveguide branching from and formed adjacent to the beginning of said S-shaped curve portion but not overlay said S-shaped curve portion for permitting propagation of one of said components of said linearly polarized light therethrough.
Claim 2
Dependent Claim
75 words
A polarization splitter comprising: an optical waveguide formed on a dielectric substrate and having an S-shaped curve portion, for permitting propagation of a linearly polarized light having electric field components vertical or horizontal to said substrate; and an anisotropic optical waveguide branching from and formed adjacent to the beginning of said S-shaped curve portion but not overlay said S-shaped curve portion for permitting propagation of one of said components of said linearly polarized light therethrough.
Claim 3
Dependent Claim
16 words
The polarization splitter according to claim 1, wherein lithium niobate is used for said dielectric substrate.
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) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |