US4961631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonlinear optical devices from derivatives of stilbene
Assignee: EIDP Inc
•
Filing: 1989-11-16
•
Granted: 1990-10-09
•
Expires: 2009-11-16
Abstract
Abstract Certain derivatives of stilbene are capable of second harmonic generation when illuminated by coherent optical radiation.
Inventors
- 👤 Robert A. Clement
- 👤 Wilson Tam
- 👤 Ying Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3611; C; C07; C07C; C07C205/00; C07C205/07; C07C205/11; C07C205/27; C07C205/35; C07C255/00; C07C255/01; C07C255/32; C07C255/35; C07C255/37
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
172 words
A nonlinear optical device capable of second harmonic generation comprising a nonlinear optical element, a source of coherent optical radiation, and means to direct the coherent beam of radiation into the nonlinear optical element, said nonlinear optical element comprising a compound having the general formula ##STR2## wherein A or D is NO 2 and, correspondingly, D or A is selected from the group consisting of F, Cl, Br, I, CHO and OR where R is selected from the group consisting of H, C 1 -C 10 branched or unbranched alkyl, and C 1 -C 10 branched or unbranched hydroxyalkyl, and X is selected from the group consisting of F, Cl, Br, I, CN, C 1 -C 4 branched or unbranched alkyl; said compound being crystallized in a noncentrosymmetric space group, provided when X is CN, then (1) A is selected from the group consisting of CHO and OR and D is NO 2 or (2) D is selected from the group consisting of CHO and OR and A is NO 2 .
Claim 2
Dependent Claim
172 words
A nonlinear optical device capable of second harmonic generation comprising a nonlinear optical element, a source of coherent optical radiation, and means to direct the coherent beam of radiation into the nonlinear optical element, said nonlinear optical element comprising a compound having the general formula ##STR2## wherein A or D is NO 2 and, correspondingly, D or A is selected from the group consisting of F, Cl, Br, I, CHO and OR where R is selected from the group consisting of H, C 1 -C 10 branched or unbranched alkyl, and C 1 -C 10 branched or unbranched hydroxyalkyl, and X is selected from the group consisting of F, Cl, Br, I, CN, C 1 -C 4 branched or unbranched alkyl; said compound being crystallized in a noncentrosymmetric space group, provided when X is CN, then (1) A is selected from the group consisting of CHO and OR and D is NO 2 or (2) D is selected from the group consisting of CHO and OR and A is NO 2 .
Claim 3
Dependent Claim
24 words
An optical element as defined in claim 1 where R in the compound of said element, wherein D or A is OR, is methyl.
Claim 4
Dependent Claim
14 words
The nonlinear optical device as defined in claim 1 wherein the compound is 1-cyano-1-(4-nitrophenyl)-2-(4-methoxyphenyl)ethylene.
Claim 5
Dependent Claim
13 words
An optical element as defined in claim 1 wherein the compound is 1-cyano-1-(4-methoxyphenyl)-2-(4-nitrophenyl)ethylene.
Claim 6
Dependent Claim
13 words
An optical element as defined in claim 1 wherein the compound is 1-methyl-1-(4-nitrophenyl)-2-(4-methoxyphenyl)ethylene.
Claim 7
Dependent Claim
13 words
An optical element as defined in claim 1 wherein the compound is 1-bromo-1-(4-nitrophenyl)-2-(4-bromophenyl)ethylene.
Claim 8
Dependent Claim
13 words
An optical element as defined in claim 1 wherein the compound is 1-bromo-1-(4-nitrophenyl)-2-(4-methoxyphenyl)ethylene.
Claim 9
Dependent Claim
53 words
In an electro-optic modulator comprising means to direct a coherent beam of radiation into an optical element and means to apply an electric field to said optical element in a direction to modify the transmission of said beam, the improvement wherein said beam is directed into the optical element defined in claim 1.
References Cited (Backward Citations)
GB1331228A
Cited
US3767289A
Cited
US3742067A
Cited
JPS62156628A
Cited
US4859876A
Cited
GB2204053A
Cited
EP0315894A1
Cited
JPH01173017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |