US5046803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Actively phased matched frequency doubling optical waveguide
Assignee: Philips North America LLC
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Filing: 1989-12-08
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Granted: 1991-09-10
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Expires: 2009-12-08
Abstract
Abstract An actively phase matched waveguide structure suitable for use as a frequency doubling device is described. The phase matching of the waveguide is controlled by application of a control voltage. The waveguide includes first and second non-linear optical layers of material having differing indexes of refraction forming a waveguide. Disposed on the surface of the waveguide is a layer of transparent semiconductor material disposed between two transparent electrodes. The index of refraction of the transparent semiconductor material varies with the potential applied to the electrode and thereby varies the phase matching of the waveguide as a whole.
Inventors
- 👤 Sel B. Colak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/377; G02F1/353; G02F1/3544; G02F1/3546
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
A tunable waveguide structure comprising: a waveguide having first and second layers of non-linear optical material, said first and second layers having differing indexes of refraction; a transparent semiconductor layer disposed on one surface of said waveguide, said transparent semiconductor layer having an index of refraction which varies by the Franz-Keldysh effect in response to an applied electrical field; and means for applying an electrical field to said transparent semiconductor layer to vary the index of refraction of said semiconductor layer to thereby control the phase matching of the waveguide as a whole.
Claim 2
Dependent Claim
93 words
A tunable waveguide structure comprising: a waveguide having first and second layers of non-linear optical material, said first and second layers having differing indexes of refraction; a transparent semiconductor layer disposed on one surface of said waveguide, said transparent semiconductor layer having an index of refraction which varies by the Franz-Keldysh effect in response to an applied electrical field; and means for applying an electrical field to said transparent semiconductor layer to vary the index of refraction of said semiconductor layer to thereby control the phase matching of the waveguide as a whole.
Claim 3
Dependent Claim
36 words
The waveguide structure as claimed in claim 1, wherein said means for applying a voltage comprise a transparent electrode disposed on each side of said semiconductor layer, said electrode being connected to a variable voltage source.
Claim 4
Dependent Claim
20 words
The waveguide structure as claimed in claim 2 further including a buffer layer disposed between said electrode and said waveguide.
Claim 5
Dependent Claim
14 words
The waveguide structure as claimed in claim 1, wherein said first layer comprises KTP.
Claim 6
Dependent Claim
16 words
The waveguide structure as claimed in claim 1, wherein said second layer comprises thallium doped KTP.
Claim 7
Dependent Claim
14 words
The waveguide structure as claimed in claim 1, wherein said semiconductor layer comprises ZnSe.
Claim 8
Dependent Claim
13 words
The waveguide structure as claimed in claim 1, wherein said electrodes comprise InSnO.
Claim 9
Independent Claim
96 words
A method for actively phase matching a waveguide structure comprising the steps of: providing a waveguide having first and second layers of non-linear optical material, said first and second layers having differing indexes of refraction; disposing a transparent semiconductor layer on a surface of said waveguide, said transparent semiconductor layer having an index of refraction which varies by the Franz-Keldysh effect in response to an applied electrical field; and applying a voltage to said semiconductor layer to the index of refraction of said semiconductor layer to control the phase matching of the waveguide as a whole.
Claim 10
Independent Claim
96 words
A method for actively phase matching a waveguide structure comprising the steps of: providing a waveguide having first and second layers of non-linear optical material, said first and second layers having differing indexes of refraction; disposing a transparent semiconductor layer on a surface of said waveguide, said transparent semiconductor layer having an index of refraction which varies by the Franz-Keldysh effect in response to an applied electrical field; and applying a voltage to said semiconductor layer to the index of refraction of said semiconductor layer to control the phase matching of the waveguide as a whole.
Claim 11
Dependent Claim
34 words
A method as claimed in claim 8, wherein said means for applying a voltage comprise a transparent electrode disposed on each side of said semiconductor layer, said electrode being connected to a voltage source.
References Cited (Backward Citations)
GB1594387A
Cited
US4427260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |