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US5543960A
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Electro-optic crystal mosaics for the generation of terahertz radiation
Assignee: Molecular Optoelectronics Corp
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Filing: 1995-05-11
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Granted: 1996-08-06
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Expires: 2015-05-11
Abstract
Abstract Apparatus for the generation of high energy terahertz radiation is presented and comprises laser means effective to produce subpicosecond optical pulses and a mosaic comprising a plurality of planar electro-optic crystals fastened together edge to edge in the form of a grid. The electro-optic crystals are in optical communication with the subpicosecond optical pulses, and behave as a single large electro-optic crystal, producing high energy terahertz radiation by way of optical rectification.
Inventors
- 👤 Timothy J. Carrig
- 👤 Antoinette J. Taylor
- 👤 Kevin R. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:11
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/353; G02F1/3534; G02F1/355; G02F1/3551
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
Apparatus for the generation of high energy terahertz radiation comprising: laser means effective to produce subpicosecond optical pulses; and a mosaic comprising a plurality of planar electro-optic crystals fastened together edge to edge in the form of a grid, each of said plurality of planar electro-optic crystals having its molecular dipole axis aligned with the molecular dipole axes of adjacent of said plurality of planar electro-optic crystals, said mosaic being in optical communication with said subpicosecond optical pulses; wherein said plurality of planar electro-optic crystals behave as a single large electro-optic crystal and produce high energy terahertz radiation by way of optical rectification.
Claim 2
Dependent Claim
103 words
Apparatus for the generation of high energy terahertz radiation comprising: laser means effective to produce subpicosecond optical pulses; and a mosaic comprising a plurality of planar electro-optic crystals fastened together edge to edge in the form of a grid, each of said plurality of planar electro-optic crystals having its molecular dipole axis aligned with the molecular dipole axes of adjacent of said plurality of planar electro-optic crystals, said mosaic being in optical communication with said subpicosecond optical pulses; wherein said plurality of planar electro-optic crystals behave as a single large electro-optic crystal and produce high energy terahertz radiation by way of optical rectification.
Claim 3
Dependent Claim
21 words
The apparatus as described in claim 1, wherein said plurality of electro-optic crystals comprises crystals of dimethyl amino 4-N-methylstilbazolium tosylate (DAST).
Claim 4
Dependent Claim
29 words
The apparatus as described in claim 2, wherein said laser means operates at a wavelength between 750 nm and 1600 nm and produces puleswidths no longer than 5 ps.
Claim 5
Dependent Claim
15 words
The apparatus as described in claim 2, wherein said laser means comprises a Ti:sapphire laser.
Claim 6
Dependent Claim
28 words
The apparatus as described in claim 4, wherein said Ti:sapphire laser operates at a wavelength of 810 nm and produces pulses having a pulsewidth of approximately 215 fs.
Claim 7
Dependent Claim
21 words
The apparatus as described in claim 1, wherein said plurality of electro-optic crystals comprises crystals of lithium niobate (LiNbO 3 ).
Claim 8
Dependent Claim
29 words
The apparatus as described in claim 1, wherein said laser means operates at a wavelength between 500 nm and 5000 nm and produces puleswidths no longer than 5 ps.
Claim 9
Dependent Claim
43 words
The apparatus as described in claim 1, wherein said plurality of planar electro-optic crystals comprise a combination of one or more electro-optic crystal from the group consisting of dimethyl amino 4-N-methylstilbazolium tosylate, lithium tantalate (LiTaO 3 ) and lithium niobate (LiNbO 3 ).
Claim 10
Dependent Claim
18 words
The apparatus as described in claim 1, wherein said plurality of electro-optic crystals are mounted onto a substrate.
Claim 11
Dependent Claim
18 words
The apparatus as described in claim 1, wherein said plurality of electro-optic crystals are mounted into a frame.
Claim 12
Dependent Claim
21 words
The apparatus as described in claim 1, wherein said plurality of electro-optic crystals comprises crystals of lithium tantalate (LiTaO 3 ).
Claim 13
Dependent Claim
29 words
The apparatus as described in claim 11, wherein said laser means operates at a wavelength between 500 nm and 5000 nm and produces puleswidths no longer than 5 ps.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |