Patent US3611207A successfully refreshed from Google Patents.
US3611207A
Expired / Lapsed
US
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Wide aperture electrooptic modulator
Assignee: Individual
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Filing: 1970-01-05
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Granted: 1971-10-05
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Expires: 1990-01-05
Abstract
Abstract This invention consists of a P-N junction electrooptic modulator in a semiconductor exhibiting the Pockels effect. The modulator has a relatively wide optical aperture surrounding the junction. This wide aperture is obtained by use of a junction with a relatively shallow concentration gradient of dopant impurities.
Inventors
- 👤 Carl N Klahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; G02F1/0151; G02F1/0154
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
An electro-optic modulator comprising at least one PN junction in a semiconductor crystal exhibiting the Pockels effect, with electrical contacts on either side of the PN junction whereby a voltage may be applied across said junction, wherein the dielectric waveguide region surrounding said junction is at least 10 microns wide, and wherein the dopant concentration gradient across said junction is less than or equal to the ratio of the differenCe in dopant concentrations on the two sides of said junction to the width of the dielectric waveguide region.
Claim 2
Dependent Claim
88 words
An electro-optic modulator comprising at least one PN junction in a semiconductor crystal exhibiting the Pockels effect, with electrical contacts on either side of the PN junction whereby a voltage may be applied across said junction, wherein the dielectric waveguide region surrounding said junction is at least 10 microns wide, and wherein the dopant concentration gradient across said junction is less than or equal to the ratio of the differenCe in dopant concentrations on the two sides of said junction to the width of the dielectric waveguide region.
Claim 3
Dependent Claim
66 words
An electro-optical modulator comprising at least one PN junction in a semiconductor crystal exhibiting the Pockels effect, with electrical contacts on either side of the PN junction whereby a voltage may be applied across said junction, wherein the dielectric waveguide region surrounding said junction is at least 10 microns wide, and wherein the dopant concentration gradient across said junction region is less than 1022 cm. 4
Claim 4
Dependent Claim
66 words
An electro-optical modulator comprising at least one PN junction in a semiconductor crystal exhibiting the Pockels effect, with electrical contacts on either side of the PN junction whereby a voltage may be applied across said junction, wherein the dielectric waveguide region surrounding said junction is at least 10 microns wide, and wherein the dopant concentration gradient across said junction region is less than 1022 cm. 4
Claim 5
Dependent Claim
26 words
An electro-optical modulator as defined in claim 1, with optical input and output terminals at the two extremities of an optical path through said junction region.
Claim 6
Dependent Claim
26 words
An electro-optical modulator as defined in claim 2 with optical input and output terminals at the two extremities of an optical path through said junction region.
Claim 7
Dependent Claim
14 words
An electro-optical modulator as defined in claim 1, with a plurality of PN junctions.
Claim 8
Dependent Claim
14 words
An electro-optical modulator as defined in claim 2 with a plurality of PN junctions.
Claim 9
Dependent Claim
25 words
An electro-optical modulator as defined in claim 1, set between two polarizing crystals whose directions of polarization are at a substantial angle to one another.
Claim 10
Dependent Claim
25 words
An electro-optical modulator as defined in claim 2, set between two polarizing crystals whose directions of polarization are at a substantial angle to one another.
Claim 11
Dependent Claim
37 words
An electro-optical modulator as defined in claim 1, placed between a laser source and a polarizing crystal, whose polarization angle is set to extinction of the transmitted radiation when no voltage is applied across the PN junction.
Claim 12
Dependent Claim
37 words
An electro-optical modulator as defined in claim 2, placed between a laser source and a polarizing crystal, whose polarization angle is set to extinction of the transmitted radiation when no voltage is applied across the PN junction.
References Cited (Backward Citations)
US3331036A
Cited
US3439169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |