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US4300814A
Expired / Lapsed
US
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Method for balancing an integrated optical device and a device obtained by means of said method
Assignee: Individual
•
Filing: 1980-02-06
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Granted: 1981-11-17
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Expires: 2000-02-06
Abstract
Abstract A method for balancing an integrated optical device having at least two similar arms each constituted by a light guide consists in depositing a thin metal film on at least one of the two guides, in measuring the unbalance between the light intensities transmitted by the two arms and then in adjusting the dimensions of the thin metal film in order to cancel the unbalance.
Inventors
- 👤 Alain Carenco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/31; G02F1/313; G02F1/3132; G02F1/01; G02F1/21; G02F1/225; G02F2203/00; G02F2203/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A method for balancing an integrated optical device comprising at least two similar arms each constituted by a light guide, wherein said method consists: in depositing a thin metal film on at least one of the two guides, in measuring the unbalance between the light intensities transmitted by the two arms, in adjusting the dimensions of the thin metal film so as to reduce said unbalance to zero.
Claim 2
Independent Claim
68 words
A method for balancing an integrated optical device comprising at least two similar arms each constituted by a light guide, wherein said method consists: in depositing a thin metal film on at least one of the two guides, in measuring the unbalance between the light intensities transmitted by the two arms, in adjusting the dimensions of the thin metal film so as to reduce said unbalance to zero.
Claim 3
Dependent Claim
36 words
A method according to claim 1, wherein the procedure for adjusting the dimensions of the thin metal film consists in removing material by such means as chemical or ionic attack or machining with a laser beam.
Claim 4
Dependent Claim
26 words
A method according to claim 1 or claim 2, wherein the metal employed forms part of the group comprising platinum, copper, gold, silver, chromium and aluminum.
Claim 5
Dependent Claim
63 words
An integrated optical device obtained by means of the method according to claim 1, comprising at least two arms each constituted by a light guide, wherein at least one of the two guides is partially covered by a thin metal film, the dimensions of said film being adjusted so as to cancel the unbalance between the light intensities transmitted by the two arms.
Claim 6
Dependent Claim
16 words
An optical device according to claim 4, wherein said device is of the Mach-Zehnder interferometer type.
Claim 7
Dependent Claim
16 words
An optical device according to claim 4, wherein the two arms form a Y-shaped beam splitter.
Claim 8
Dependent Claim
15 words
An optical device according to claim 4, wherein the two arms form a directional coupler.
References Cited (Backward Citations)
US4256778A
Cited
US4146297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |