US3920314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mode conversion and mode separation branched dielectric waveguide element for light
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1974-03-12
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Granted: 1975-11-18
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Expires: 1994-03-12
Abstract
Abstract A mode conversion and mode separation branched dielectric waveguide element for light comprising branches having optically different characteristics which are surrounded by a medium or media having different refractive indexes from that of the dielectric material or materials forming the branches. In one embodiment, one of the surrounding media is an electrooptical crystal provided with at least one pair of electrodes near the parting portion of the branches. As a modification, the branches may be connected at the opposite ends thereof to form a by-pass construction.
Inventors
- 👤 Hiroyoshi Yajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:05
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/31; G02F1/313; G02F1/3137; G02B; G02B6/00; G02B6/10; G02B6/14; G02B6/24; G02B6/26; G02B6/28; G02B6/2804
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A mode conversion and mode separation branched waveguide element for incoming light comprising a first light transmission line formed of a dielectric material having a refractive index larger than that of the surrounding material and a second light transmission line formed of a dielectric material having a refractive index larger than that of the surrounding material, said lines being separate and non-contacting over a portion thereof and being connected at an angle to each other an one end, said first transmission line being different in optical characteristics from said second transmission line to effect mode conversion and mode separation of incoming light.
Claim 2
Dependent Claim
102 words
A mode conversion and mode separation branched waveguide element for incoming light comprising a first light transmission line formed of a dielectric material having a refractive index larger than that of the surrounding material and a second light transmission line formed of a dielectric material having a refractive index larger than that of the surrounding material, said lines being separate and non-contacting over a portion thereof and being connected at an angle to each other an one end, said first transmission line being different in optical characteristics from said second transmission line to effect mode conversion and mode separation of incoming light.
Claim 3
Dependent Claim
44 words
A mode conversion and mode separation branched waveguide element as set forth in claim 1 wherein a portion of the surrounding material of one of said lines is an electrooptical crystal, said electrooptical crystal being in plane contact with said one of said lines.
Claim 4
Dependent Claim
33 words
A mode conversion and mode separation branched waveguide element as set forth in claim 2 further comprising a pair of electrodes disposed on said electrooptical crystal near the connecting portion of said lines.
Claim 5
Dependent Claim
41 words
A mode conversion and mode separation branched waveguide element as set forth in claim 3 wherein the other end of said second light transmission line is connected to the other end of said first transmission line to form a by-pass construction.
Claim 6
Dependent Claim
28 words
A mode conversion and mode separation branched waveguide element as set forth in claim 4 wherein the thickness of either of said light transmission lines is varied therealong.
Claim 7
Dependent Claim
41 words
A mode conversion and mode separation branched waveguide element as set forth in claim 1 wherein the other end of said second light transmission line is connected to the other end of said first transmission line to form a by-pass construction.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |