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US4240048A
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Nonlinear optical device
Assignee: EIDP Inc
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Filing: 1978-12-15
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Granted: 1980-12-16
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Expires: 1998-12-15
Abstract
Abstract Nonlinear optical device in which the crystal therein, having nonlinear optical properties, is transparent to the radiation propagating therethrough, has 6 or 6 m2 symmetry and consists essentially of the compound of the formula LnF.sub.x (OH).sub.1-x CO.sub.3 wherein Ln is La, Eu or Gd and x is 0 to 1; a preferred compound is LaOHCO 3 .
Inventors
- 👤 Fredrick C. Zumsteg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:33
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/3551
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
Useful nonlinear optical device comprising: (a) the crystal which: (1) consists essentially of the compound of the formula LnF x (OH) 1-x CO 3 wherein Ln is La, Eu or Gd and x is 0 to 1; (2) is transparent to the radiation propagating therethrough; and (3) has 6 or 6m2 symmetry; (b) means for directing incident coherent plane polarized electromagnetic radiation of one or more frequencies into the crystal; and (c) means for extracting from the crystal emerging coherent electromagnetic radiation having at least one frequency different from any frequency in the incident radiation, the crystal being positioned so that the angle between its optic axis and the direction of propagation of the incident radiation is such that the incident and emerging radiation are phase-matched within the crystal.
Claim 2
Dependent Claim
129 words
Useful nonlinear optical device comprising: (a) the crystal which: (1) consists essentially of the compound of the formula LnF x (OH) 1-x CO 3 wherein Ln is La, Eu or Gd and x is 0 to 1; (2) is transparent to the radiation propagating therethrough; and (3) has 6 or 6m2 symmetry; (b) means for directing incident coherent plane polarized electromagnetic radiation of one or more frequencies into the crystal; and (c) means for extracting from the crystal emerging coherent electromagnetic radiation having at least one frequency different from any frequency in the incident radiation, the crystal being positioned so that the angle between its optic axis and the direction of propagation of the incident radiation is such that the incident and emerging radiation are phase-matched within the crystal.
Claim 3
Dependent Claim
26 words
Device of claim 1 wherein Ln is La, x is 0, the crystal has 6 symmetry and the wavelength of the incident radiation is 0.205-2.30 μm.
Claim 4
Dependent Claim
9 words
Device of claim 1 as a second harmonic generator.
Claim 5
Dependent Claim
19 words
Device of claim 3 wherein Ln is La, x is 0 to 0.5 and the crystal has 6 symmetry.
Claim 6
Dependent Claim
19 words
Device of claim 3 wherein Ln is La, x is 0.7 to 1 and the crystal has 6m2 symmetry.
Claim 7
Dependent Claim
18 words
Device of claim 4 where x is 0 and the wavelength of the incident radiation is 0.51-2.30 μm.
Claim 8
Dependent Claim
34 words
Device of claim 6 wherein the angle between the crystal optic axis and the direction of propagation of the incident radiation is selected from the Type I and Type II curves of FIG. 4.
Claim 9
Dependent Claim
17 words
Device of claim 3 wherein Ln is Eu, x is 0 and the crystal has 6 symmetry.
Claim 10
Dependent Claim
17 words
Device of claim 3 wherein Ln is Gd, x is 0 and the crystal has 6 symmetry.
Claim 11
Dependent Claim
115 words
Process for changing the frequency of incident coherent plane polarized electromagnetic radiation of one or more frequencies in a useful nonlinear optical device, which process comprises directing the incident radiation into the crystal of the device, which crystal: (a) consists essentially of the compound of the formula LnF x (OH) 1-2 CO 3 wherein Ln is La, Eu or Gd and x is 0 to 1; (b) is transparent to the radiation propagating therethrough; and (c) has 6 or 6m2 symmetry, the crystal being positioned so that the angle between its optic axis and the direction of propagation of the incident radiation is such that the incident and emerging radiation are phase-matched within the crystal.
Claim 12
Dependent Claim
115 words
Process for changing the frequency of incident coherent plane polarized electromagnetic radiation of one or more frequencies in a useful nonlinear optical device, which process comprises directing the incident radiation into the crystal of the device, which crystal: (a) consists essentially of the compound of the formula LnF x (OH) 1-2 CO 3 wherein Ln is La, Eu or Gd and x is 0 to 1; (b) is transparent to the radiation propagating therethrough; and (c) has 6 or 6m2 symmetry, the crystal being positioned so that the angle between its optic axis and the direction of propagation of the incident radiation is such that the incident and emerging radiation are phase-matched within the crystal.
Claim 13
Dependent Claim
21 words
Process of claim 10 wherein one frequency of the emerging radiation is twice that of one frequency of the incident radiation.
Claim 14
Dependent Claim
55 words
Process of claim 11 wherein Ln is La, x is 0, the crystal has 6 symmetry, the wavelength of the incident radiation is 0.51-2.30 μm and the angle between the crystal optic axis and the direction of propagation of the incident radiation is selected from the Type I and Type II curves of FIG. 4.
Claim 15
Dependent Claim
17 words
Process of claim 11 wherein Ln is Eu, x is 0 and the crystal has 6 symmetry.
Claim 16
Dependent Claim
17 words
Process of claim 11 wherein Ln is Gd, x is 0 and the crystal has 6 symmetry.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |