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US3778635A
Expired / Lapsed
US
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Liquid parametric optical mixing device
Assignee: United States Department of the Navy
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Filing: 1972-06-08
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Granted: 1973-12-11
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Expires: 1992-06-08
Abstract
Abstract A laser-light mixing device in which the nonlinear medium for mixing two collinear laser beams comprises the chemical compound hexafluoroisopropanol, (CF3)2CHOH, which has an index of refraction which varies by only one part per thousand over a spectral range of 6,300 to 7,700 A, thus enabling mixing to occur over a long pathlength. The light resulting from the mixing action is then passed through an optical filter which allows only the sum or difference frequency to pass.
Inventors
- 👤 J Giuliani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:28
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/353; G02F1/3534
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
21 words
Apparatus as in claim 1, said compound having a substantially flat index of refraction from approximately 6,300 to approximately 7,700 A.
Claim 2
Dependent Claim
10 words
Apparatus as in claim 1, said compound being hexafluoroisopropanol, (CF3)2CHOH.
Claim 3
Dependent Claim
21 words
Apparatus as in claim 3, wherein said collinear projection means comprises a beamsplitter and said filtering means comprises oPtical blocking filters.
Claim 4
Dependent Claim
160 words
In a mixing device for mixing the light output from at least two laser-light sources, said mixing device comprising at least two sources of laser light having frequencies lying in a given spectral range, collinear projection means for projecting the output beams of said laser sources collinearly, mixing means for nonlinearly combining said two laser beams, and frequency filtering means for blocking all light from said mixing means except a sum or a difference frequency of said two laser beams, a liquid mixing medium for use in said mixing means consisting of a single-compound liquid whose index of refraction is substantially flat over said given range of spectral frequencies said index of refraction changing by no more than one part in 1,000 over said spectral range, said liquid medium being capable of containing other additives as desired where such additives do not lessen the flatness of the overall index of refraction of the medium below one part in one thousand.
Claim 5
Dependent Claim
21 words
Apparatus as in claim 5, said compound having a substantially flat index of refraction from approximately 6,300 to approximately 7,700 A.
Claim 6
Dependent Claim
10 words
Apparatus as in claim 5, said compound being hexafluoroisopropanol, (CF3)2CHOH.
Claim 7
Dependent Claim
21 words
Apparatus as in claim 7, wherein said collinear projection means comprises a beamsplitter and said filtering means comprises optical blocking filters.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |