US5094553A
Expired / Lapsed
US
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Optical waveguides and method for their fabrication
Assignee: Molecular Optoelectronics Corp
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Filing: 1990-11-28
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Granted: 1992-03-10
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Expires: 2010-11-28
Abstract
Abstract Optical waveguides comprise as core and cladding materials a chemical compound in two different crystalline forms with different indices of refraction. Preferably, the non-linear form is anhydrous and the linear form is a hydrate thereof, whereupon the core material can be prepared by selective heating of the cladding material as by a laser beam. A preferred compound is 4'-dimethylamino-4-methylstilbazolium p-toluenesulfonate.
Inventors
- 👤 Christopher P. Yakymyshyn
- 👤 Eugene P. Boden
- 👤 Peter D. Phelps
- 👤 Kevin R. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/061; G02F1/065; G02F1/35; G02F1/355; G02F1/361; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
An optical waveguide comprising a light-transmitting core comprising a chemical compound in a first crystalline form having optically second order non-linear properties and a cladding material partially or entirely enclosing said core, said cladding material comprising said chemical compound in a different crystalline form having a lower index of refraction than the core; said cladding material being readily convertible to the core material.
Claim 2
Dependent Claim
63 words
An optical waveguide comprising a light-transmitting core comprising a chemical compound in a first crystalline form having optically second order non-linear properties and a cladding material partially or entirely enclosing said core, said cladding material comprising said chemical compound in a different crystalline form having a lower index of refraction than the core; said cladding material being readily convertible to the core material.
Claim 3
Dependent Claim
16 words
A waveguide according to claim 1 wherein the cladding material is a hydrate of said compound.
Claim 4
Dependent Claim
12 words
A waveguide according to claim 2 wherein said compound is 4'-dimethylamino-4-methylstilbazolium p-toluenesulfonate.
Claim 5
Dependent Claim
14 words
A waveguide according to claim 3 wherein the core is in single crystal form.
Claim 6
Independent Claim
41 words
A method for producing an optical waveguide which comprises depositing a film of hydrated 4'-dimethylamino-4-methylstilbazolium p-toluenesulfonate on a substrate as a cladding material and heating a selected region thereof to produce the anhydrous compound in single crystal form as the core.
Claim 7
Independent Claim
41 words
A method for producing an optical waveguide which comprises depositing a film of hydrated 4'-dimethylamino-4-methylstilbazolium p-toluenesulfonate on a substrate as a cladding material and heating a selected region thereof to produce the anhydrous compound in single crystal form as the core.
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) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |