US4679892A
Expired / Lapsed
US
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Component for an integrated optical system
Assignee: US Philips Corp
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Filing: 1984-10-05
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Granted: 1987-07-14
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Expires: 2004-10-05
Abstract
Abstract Component for an integrated optical system, in particular for guiding electromagnetic radiation in the visible and/or infrared wavelength range. The component comprises a monocrystalline substrate of a material having a garnet structure and a refractive index n 1 . A dielectric layer having a refractive index n 2 (n 2 <n 1 ) is grown epitaxially on a surface of the substrate. An optical waveguide layer having a refractive index n 3 (n 3 >n 2 ) is grown epitaxially on the dielectric layer.
Inventors
- 👤 Jan Haisma
- 👤 Pieter van der Werf
- 👤 John M. Robertson, deceased
- 👤 administrator by Freidrich J. de Haan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
B; B82; B82Y; B82Y25/00; G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; G02B6/131
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A component for an integrated optical system for guiding visible or infrared electromagnetic radiation, said component comprising: a monocrystalline substrate of a material having a garnet structure and a refractive index n 1 , said substrate not being a waveguide; a dielectric layer having a refractive layer n 2 grown epitaxially directly on the substrate, n 2 being smaller than n 1 ; and an optical waveguide layer having a refractive index n 3 grown epitaxially directly on the dielectric layer, n 3 being greater than n 2 .
Claim 2
Dependent Claim
89 words
A component for an integrated optical system for guiding visible or infrared electromagnetic radiation, said component comprising: a monocrystalline substrate of a material having a garnet structure and a refractive index n 1 , said substrate not being a waveguide; a dielectric layer having a refractive layer n 2 grown epitaxially directly on the substrate, n 2 being smaller than n 1 ; and an optical waveguide layer having a refractive index n 3 grown epitaxially directly on the dielectric layer, n 3 being greater than n 2 .
Claim 3
Dependent Claim
21 words
A component as claimed in claim 1, characterized in that the substrate consists of Gd 3 Ga 5 O 12 .
Claim 4
Dependent Claim
43 words
A component as claimed in claim 2, characterized in that the dielectric layer consists of R 3 Sc x Al 5-x O 12 , where R consists of one or more of the group of yttrium and a rare-earth metal, and where 0<x<5.
Claim 5
Dependent Claim
23 words
A component as claimed in claim 3, characterized in that R consists of one or more of the group of yttrium and gadolinium.
Claim 6
Dependent Claim
38 words
A component as claimed in claim 4, characterized in that the waveguide layer consists of R' 3 Ga 5 O 12 , where R' consists of one or more of the group of yttrium and a rare-earth metal.
Claim 7
Dependent Claim
13 words
A component as claimed in claim 5, characterized in that R' is gadolinium.
Claim 8
Dependent Claim
38 words
A component as claimed in claim 3, characterized in that the waveguide layer consists of R' 3 Ga 5 O 12 , where R' consists of one or more of the group of yttrium and a rare-earth metal.
Claim 9
Dependent Claim
13 words
A component as claimed in claim 7, characterized in that R' is gadolinium.
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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |