US4427260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-linear optical device with a composite waveguide and radiation source using such a device
Assignee: Thales SA
•
Filing: 1980-12-03
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Granted: 1984-01-24
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Expires: 2000-12-03
Abstract
Abstract Non-linear optical devices incorporating an integrated waveguide on a substrate, also relating to a non-linear optical device utilizing a passive layer covering the integrated waveguide making it possible by increasing the effective index ranges of the fundamental and harmonic radiations to obtain a phase matching for two propagated modes having an increased overlap integral value. The invention is more particularly applicable to frequency doubling making it possible to obtain a visible radiation source from a primary source functioning in the very-near infrared region.
Inventors
- 👤 Claude Puech
- 👤 Michel Papuchon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:58
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/39; G02F1/395; G02F1/37; G02F1/377; G02F1/01; G02F1/03; G02F1/353; G02F1/3544; G02F1/3546
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A non-linear optical device for producing harmonic radiation from an instant fundamental radiation, said radiations being confined in a waveguide obtained by diffusing a metal ion from the surface of a lithium niobate substrate, wherein phase matching is obtained by coating the free face of the waveguide with at least one passive layer making the effective indices of a fundamental propagation mode and a harmonic propagation mode coincide offering an overlap integral value exceeding that obtainable in the absence of said passive layer.
Claim 2
Dependent Claim
83 words
A non-linear optical device for producing harmonic radiation from an instant fundamental radiation, said radiations being confined in a waveguide obtained by diffusing a metal ion from the surface of a lithium niobate substrate, wherein phase matching is obtained by coating the free face of the waveguide with at least one passive layer making the effective indices of a fundamental propagation mode and a harmonic propagation mode coincide offering an overlap integral value exceeding that obtainable in the absence of said passive layer.
Claim 3
Dependent Claim
16 words
A device according to claim 1, wherein electrical means for adjusting the phase matching are provided.
Claim 4
Dependent Claim
22 words
A device according to claim 2, wherein the electrical means comprise a control voltage source connected to two electrodes surrounding the waveguide.
Claim 5
Dependent Claim
12 words
A device according to claim 1, wherein the metal ion is nickel.
Claim 6
Dependent Claim
15 words
A device according to claim 4, wherein the passive layer is made from niobium oxide.
Claim 7
Dependent Claim
40 words
A radiation source incorporating a non-linear optical device according to any of the preceding claims, wherein the fundamental radiation is produced by a monochromatic radiation source, whose frequency is linked by non-linear interaction to that of the harmonic radiation supplied.
Claim 8
Dependent Claim
20 words
A source according to claim 6, wherein the monochromatic radiation source is a semiconducting laser emitting in the infrared region.
Claim 9
Dependent Claim
14 words
A source according to claim 7, wherein the harmonic radiation supply is visible radiation.
Claim 10
Dependent Claim
20 words
A source according to claim 6, wherein a second fundamental radiation produced by another source is applied to the waveguide.
References Cited (Backward Citations)
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US3586872A
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FR2193990B1
Cited
US3822927A
Cited
US3856379A
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GB1559128A
Cited
US4236785A
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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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |