US3949323A
Expired / Lapsed
US
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Crystals of (K, Rb, NH4)TiO(P, As)O4 and their use in electrooptic devices
Assignee: EIDP Inc
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Filing: 1974-03-14
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Granted: 1976-04-06
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Expires: 1994-03-14
Abstract
Abstract Crystals of compounds of the type (K, Rb, Tl, NH 4 )TiO(P, As)O 4 with the proviso that when NH 4 is present, As is absent, can be grown by hydrothermal methods. The crystals are optically biaxially positive, and piezoelectric and are useful in parametric amplifiers, oscillators, second harmonic generators, modulators and the like.
Inventors
- 👤 John David Bierlein
- 👤 Thurman Eugene Gier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:11
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/3551; G02F1/3553; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01G; C01G28/00; C01G28/002; C30; C30B; C30B29/00; C30B29/10; C30B29/14; C30B7/00; G02F1/0009; G02F1/0018; C01P; C01P2002/00; C01P2002/70; C01P2002/76; C01P2002/77; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
In a nonlinear optical device comprising means to direct at least one incident beam of electromagnetic radiation into a crystal having nonlinear optical properties whereby electromagnetic radiation emerging from said crystal contains at least one frequency different from the frequency of any incident beam of radiation, wherein the improvement comprises a crystal consisting of a compound having the formula MTiO(XO.sub.4) wherein M is at least one K, Rb, Tl or NH 4 and X is at least one of P or As and wherein X is P when M is NH 4 as said crystal having nonlinear optical properties.
Claim 2
Dependent Claim
99 words
In a nonlinear optical device comprising means to direct at least one incident beam of electromagnetic radiation into a crystal having nonlinear optical properties whereby electromagnetic radiation emerging from said crystal contains at least one frequency different from the frequency of any incident beam of radiation, wherein the improvement comprises a crystal consisting of a compound having the formula MTiO(XO.sub.4) wherein M is at least one K, Rb, Tl or NH 4 and X is at least one of P or As and wherein X is P when M is NH 4 as said crystal having nonlinear optical properties.
Claim 3
Dependent Claim
11 words
Device of claim 1 wherein said crystal is RbTiO(PO 4 ).
Claim 4
Dependent Claim
92 words
In an electrooptic modulator comprising means to direct a beam of polarized radiation into a birefringent crystal, and means to apply an electric field to said crystal to change birefringence, whereby the polarization of radiation emerging from said crystal is changed, wherein the improvement comprises said crystal consisting of a compound having the formula MTiO(XO.sub.4) wherein M is at least one of K, Rb, T1 or NH 4 and X is at least one of P or As and wherein X is P when M is NH 4 as said birefringent crystal.
Claim 5
Dependent Claim
92 words
In an electrooptic modulator comprising means to direct a beam of polarized radiation into a birefringent crystal, and means to apply an electric field to said crystal to change birefringence, whereby the polarization of radiation emerging from said crystal is changed, wherein the improvement comprises said crystal consisting of a compound having the formula MTiO(XO.sub.4) wherein M is at least one of K, Rb, T1 or NH 4 and X is at least one of P or As and wherein X is P when M is NH 4 as said birefringent crystal.
Claim 6
Dependent Claim
11 words
Device of claim 3 wherein said crystal is RbTiO(PO 4 ).
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |