Patent US4153328A successfully refreshed from Google Patents.
US4153328A
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US
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Polarization converter and circuit elements for use in optical waveguides
Assignee: University of California, San Diego
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Filing: 1974-05-13
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Granted: 1979-05-08
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Expires: 1994-05-13
Abstract
Abstract Wave propagation in thin film optical waveguides using gyrotropic or anisotropic material in either the substrate or adjacent top layer with respect to the thin film waveguide is analyzed and a mode converter capable of converting TE to TM or TM to TE polarization is disclosed. Several mode converters constructed in accordance with the present invention are set forth. Also disclosed are other optical circuit elements constructed from such mode converters including a gyrator, isolator, an optical switch, and a non-destructive optical readout for magnetic memories.
Inventors
- 👤 Shyh Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09; G02F1/095; G02B; G02B6/00; G02B6/10; G02B6/105; G02F1/03; G02F1/035; G02F1/0353; G02F1/0136; G02F1/0142
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
An optical waveguide gyrator, a first mode converter, a second mode converter selected to form a complementary pair with said first converter, means forming an optical waveguide interconnecting said converter, a first optical waveguide pair forming a branched input to said first mode converter and constructed and arranged for selectively propagating TE waves in one branch and TM waves in the other branch, and a second optical waveguide pair forming a branched output from said second mode converter and constructed and arranged for propagating TE waves in one branch and TM waves in the other branch.
Claim 2
Dependent Claim
96 words
An optical waveguide gyrator, a first mode converter, a second mode converter selected to form a complementary pair with said first converter, means forming an optical waveguide interconnecting said converter, a first optical waveguide pair forming a branched input to said first mode converter and constructed and arranged for selectively propagating TE waves in one branch and TM waves in the other branch, and a second optical waveguide pair forming a branched output from said second mode converter and constructed and arranged for propagating TE waves in one branch and TM waves in the other branch.
Claim 3
Dependent Claim
40 words
A gyrator as in claim 1 in which said complementary pair of mode converters consists of a longitudinal gyrotropic mode converter plus a longitudinal anisotropic mode converter and further including phase shifter disposed between said first and second mode converters.
Claim 4
Dependent Claim
41 words
A gyrator as in claim 1 in which said complementary pair of mode converters consists of a polar gyrotropic mode converter plus a polar anisotropic mode converter and further including a phase shifter disposed between said first and second mode converters.
Claim 5
Dependent Claim
24 words
A gyrator as in claim 1 in which said complementary pair consists of a longitudinal gyrotropic mode converter plus a polar anisotropic mode converter.
Claim 6
Dependent Claim
24 words
A gyrator as in claim 1 in which said complementary pair consists of a longitudinal anisotropic mode converter plus a polar gyrotropic mode converter.
Claim 7
Dependent Claim
39 words
A gyrator as in claim 1 further in which wave absorbing elements are disposed in one of said TE or TM waveguides of both said input and output pairs to thereby adapt said gyrator to function as an isolator.
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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |