US3822927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase matched optical wave generator for integrated optical circuits
Assignee: SVG LITHOGRAPHY Inc A CORP OF
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Filing: 1972-11-16
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Granted: 1974-07-09
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Expires: 1992-11-16
Abstract
Abstract A phase matched optical wave generator is described wherein a harmonic optical wave is generated by the interaction of a fundamental optical wave with a non-linear polarizing material. The harmonic wave is coupled to a thin-film optical waveguide which is tuned to the wavelength of the harmonic optical wave. The separation of the fundamental and harmonic waves in different optical waveguides facillitates phase matching over the length of the interacting region to produce a harmonic of enhanced intensity. Several embodiments are shown and described.
Inventors
- 👤 F Zernike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:34
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/365; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/126; G02F1/353; G02F1/3534; G02F1/37; G02F1/377; G02F1/39; G02F1/395
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
170 words
An integrated optical circuit for generating optical waves of different wavelengths comprising a first thin-film optical waveguide having a thickness selected to propagate a first optical wave; a second thin-film optical waveguide having a second thickness selected to propagate a second optical wave of a different wavelength; a separating thin-film layer of optical material interposed between the first and second thin-films, said separating thinfilm layer having a lower index of refraction than said first and second thin films, said index of refraction being low enough so that only evanescent portions of the waves in the two waveguides propagate in the separating layer; and a layer of single crystal non-linear polarizing material located in interacting relationship with the first optical wave for an evanescent segment of the first optical wave interacting with said non-linear polarizing material to generate said second optical wave therein, said interacting layer being in close coupling relationship with the second thin-film optical waveguide through said separating layer to launch the second optical wave in said second waveguide.
Claim 2
Dependent Claim
170 words
An integrated optical circuit for generating optical waves of different wavelengths comprising a first thin-film optical waveguide having a thickness selected to propagate a first optical wave; a second thin-film optical waveguide having a second thickness selected to propagate a second optical wave of a different wavelength; a separating thin-film layer of optical material interposed between the first and second thin-films, said separating thinfilm layer having a lower index of refraction than said first and second thin films, said index of refraction being low enough so that only evanescent portions of the waves in the two waveguides propagate in the separating layer; and a layer of single crystal non-linear polarizing material located in interacting relationship with the first optical wave for an evanescent segment of the first optical wave interacting with said non-linear polarizing material to generate said second optical wave therein, said interacting layer being in close coupling relationship with the second thin-film optical waveguide through said separating layer to launch the second optical wave in said second waveguide.
Claim 3
Dependent Claim
59 words
The integrated optical circuit as claimed in claim 1 wherein the non-linear polarizing material is in the form of a single crystal non-linear polarizing substrate, with said first thin-film optical waveguide being deposited on the substrate to couple an evanescent segment of the first optical wave into the substrate for interaction therewith and generation of said second optical wave.
Claim 4
Dependent Claim
20 words
The integrated optical circuit as claimed in claim 2 wherein said substrate is formed of an isotropic non-linear polarization crystal.
Claim 5
Dependent Claim
27 words
The integrated optical circuit as claimed in claim 1 wherein said second optical waveguide is dimensioned for resonance with the second harmonic of the first optical wave.
Claim 6
Dependent Claim
30 words
The integrated optical circuit as claimed in claim 4 wherein said separator layer has a thickness of the order of a fraction of the wavelength of the first optical wave.
Claim 7
Dependent Claim
39 words
The integrated optical circuit as claimed in claim 1 wherein the first thin-film optical waveguide is formed of said layer of single crystal non-linear polarizing material for enhanced interaction between the first optical wave and the non-linear polarizing material.
Claim 8
Dependent Claim
24 words
The integrated optical circuit as claimed in claim 6 wherein said second thin-film optical waveguide is formed of said single crystal non-linear polarizing material.
Claim 9
Dependent Claim
54 words
The integrated optical circuit as claimed in claim 7 and further including a substrate on which the first optical waveguide is mounted, and with said separator layer and the substrate formed of a single crystal non-linear polarizing material having an index of refraction which is less than that of said first and second waveguides.
Claim 10
Dependent Claim
52 words
The integrated optical circuit as claimed in claim 8 wherein said first and second optical waveguides are formed of a first isotropic non-linear polarization material and wherein said thin-film separator and the substrate are formed of a second isotropic non-linear polarization material having a lower index of refraction than the first material.
Claim 11
Dependent Claim
118 words
An integrated optical circuit for generating different optical wavelengths from an input optical wave having a predetermined wavelength comprising a thin-film optical waveguide structure formed of a plurality of optical waveguides respectively tuned to an optical wave of a desired wavelength, A non-linear polarizing material located in interacting relationship with one of said optical waveguides for generating an optical wave which is in resonance relationship with one of said optical waveguides, wherein said thin-film optical waveguide structure includes an idler optical wave sustaining waveguide, a pump optical wave sustaining waveguide and a signal optical wave sustaining waveguide, and thin-film separator layers located between said optical waveguides, said thin-film separators having a lower refractive index than said optical waveguides.
Claim 12
Dependent Claim
118 words
An integrated optical circuit for generating different optical wavelengths from an input optical wave having a predetermined wavelength comprising a thin-film optical waveguide structure formed of a plurality of optical waveguides respectively tuned to an optical wave of a desired wavelength, A non-linear polarizing material located in interacting relationship with one of said optical waveguides for generating an optical wave which is in resonance relationship with one of said optical waveguides, wherein said thin-film optical waveguide structure includes an idler optical wave sustaining waveguide, a pump optical wave sustaining waveguide and a signal optical wave sustaining waveguide, and thin-film separator layers located between said optical waveguides, said thin-film separators having a lower refractive index than said optical waveguides.
Claim 13
Dependent Claim
27 words
The integrated optical circuit as claimed in claim 10 wherein at least one of said thin-film optical waveguides is formed of said single crystal non-linear polarizing material.
Claim 14
Dependent Claim
43 words
The integrated optical circuit as claimed in claim 11 wherein one of said thin-film optical waveguides has a thickness selected to resonate with the second harmonic of an optical wave propagating in said thin-film waveguide formed of the single crystal non-linear polarizing material.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |