US3893046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel plate transmission line laser excitation system
Assignee: Alcatel Lucent SAS
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Filing: 1974-06-25
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Granted: 1975-07-01
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Expires: 1994-06-25
Abstract
Abstract A gas laser generator comprising an electric excitation line formed by an insulating plate inserted between a first metallic plate and a second metallic plate, one edge of each of the plates being in the shape of a parabola, an active gaseous medium enclosed in a slot separating the first plate into two parts, a circuit for setting up an electrical discharge between the plates at the foci of the parabolas, each of the two parts of the first plate containing a sheet formed by an insulating layer inserted between two conductive layers, the sheet being folded back on itself so that its cross-section through a plane parallel to the slot and perpendicular to the plane of the plates is constituted by a continuous series of U''s connected together by the top end of their vertical legs.
Inventors
- 👤 Bruno Godard
- 👤 Bernard Lacour
- 👤 Maurice Michon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0971; H01S3/0973
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
258 words
In a laser generator including: an active gaseous medium; an electric excitation line formed by an insulating plate inserted between a first metallic plate and a second metallic plate, one edge of each of the plates being in the shape of a parabola whose axis forms an angle Alpha greater than zero with at least one slot formed in said first metallic plate and separating it into two distinct parts, the foci as well as the apices of said parabolas being respectively arranged on the same straight line perpendicular to the plane of the plates, said metallic plates being parallel to each other and connected to at least one voltage source; means for maintaining an active gaseous medium in said slot; and an excitation means for generating a current wave in said line and comprising discharger circuit means for producing a substantially point discharge between said metallic plates at the foci of the parabolas; and comprising the improvement wherein at least one of the parts of said first metallic plate is formed by a horizontal metallic conductive plate, and a sheet consisting of an insulating layer inserted between two electrically conductive layers, said sheet being folded back on itself so that its cross-section through a plane parallel to the slot and perpendicular to the plane of the plates has substantially the form of a continuous series of U''s having upper and lower ends aNd vertical legs, said upper ends being in contact with said horizontal metallic conductive plate, said lower ends being in contact with said insulating plate.
Claim 2
Dependent Claim
258 words
In a laser generator including: an active gaseous medium; an electric excitation line formed by an insulating plate inserted between a first metallic plate and a second metallic plate, one edge of each of the plates being in the shape of a parabola whose axis forms an angle Alpha greater than zero with at least one slot formed in said first metallic plate and separating it into two distinct parts, the foci as well as the apices of said parabolas being respectively arranged on the same straight line perpendicular to the plane of the plates, said metallic plates being parallel to each other and connected to at least one voltage source; means for maintaining an active gaseous medium in said slot; and an excitation means for generating a current wave in said line and comprising discharger circuit means for producing a substantially point discharge between said metallic plates at the foci of the parabolas; and comprising the improvement wherein at least one of the parts of said first metallic plate is formed by a horizontal metallic conductive plate, and a sheet consisting of an insulating layer inserted between two electrically conductive layers, said sheet being folded back on itself so that its cross-section through a plane parallel to the slot and perpendicular to the plane of the plates has substantially the form of a continuous series of U''s having upper and lower ends aNd vertical legs, said upper ends being in contact with said horizontal metallic conductive plate, said lower ends being in contact with said insulating plate.
Claim 3
Dependent Claim
33 words
The improvements according to claim 1 wherein the distinct part (8) of said first metallic plate (2) is arranged on the opposite side of said slot (6) from said discharger circuit means (5).
Claim 4
Dependent Claim
48 words
The improvement according to claim 2 wherein the distinct part (7) of said first metallic plate (2) is on the same side of said slot (6) as said discharger circuit means (5) and comprises a sheet identical in form to the sheet comprising the other distinct part (8).
Claim 5
Dependent Claim
59 words
A laser generator according to claim 1 wherein at one of the ends of said sheet the conductive layer (13) has a length greater than that of the other conductive layer (14) and extends to said slot (6), and the end (17) of the insulating layer (12) is folded back onto the end of the other conductive layer (14).
Claim 6
Dependent Claim
36 words
The improvement according to claim 4 wherein at the other end of the sheet the end (19 or 20) of the insulating layer (12) extends beyond the ends of the electrically conductive layers (13 and 14).
Claim 7
Dependent Claim
56 words
The improvement according to claim 1 wherein the electrically conductive layer (13) bears, through the parts connecting together the vertical legs of the U''s, against a conductive plate (16), whereas the other electrically conductive layer (14) bears, through the bases of the U''s, at least partly against said second metallic plate (3) of the excitation line.
Claim 8
Dependent Claim
20 words
The improvement according to claim 1 wherein a sealing substance (15) fills the gaps in the folds of said sheet.
Claim 9
Dependent Claim
37 words
The improvement according to claim 1 wherein the recess defined by said slot (6) and an insulating blade (9) is closed at its ends by two insulating windows transparent to an emission radiation of said gaseous medium.
Claim 10
Dependent Claim
55 words
The improvement according to claim 1 wherein said angle Alpha is such that cosine Alpha is equal to the ratio between the propagation speed of said current wave along the axis (4) of said parabolas and the propagation speed of the emission radiation of said gaseous medium in the direction (22) of said slot (6).
Claim 11
Dependent Claim
56 words
The improvement according to claim 1 wherein said first metallic plate (2) further comprises a wave reflector (10) consisting of a drilling defined by an arc of a circle substantially centered on said focus (F), the apices (S) of said parabolas and said arc of said circle being arranged on opposite sides of said focus (F).
Claim 12
Dependent Claim
74 words
The improvement according to claim 4 wherein said distinct part (7) of said first metallic plate (2) is arranged on the same side of said slot as said discharger circuit means (5), and further comprising means for bringing both said part (7) and said electrically conductive layer (13) to the same potential (-V), and means for bringing said second metallic plate (3) and the other electrically conductive layer (14) to a substantially zero potential.
Claim 13
Dependent Claim
81 words
The improvement according to claim 4 wherein the distinct part (7) of said first metallic plate (2) is arranged on the same side of said slot (6) as said discharger circuit means, and further comprising means for bringing said part (7) to a potential (-V/2) substantially equal to half of the potential (-V) of the electrically conductive layer (13), and means for bringing both said second metallic plate (3) and the other electrically conductive layer (14) to a substantially zero potential.
Claim 14
Dependent Claim
75 words
The improvement according to claim 3 wherein said conductive layer (13) is longer than said conductive layer (14) and extends to said slot (6), and further comprising means for bringing the two parts (7 and 8) of said first metallic plate (2) and both electrically conductive layers (13) to the same potential (-V), and means for bringing said second metallic plate (3) and both of the electrically conductive layers (14) to a substantially zero potential.
Claim 15
Dependent Claim
103 words
The improvement according to claim 3 wherein the corresponding elEctrically conductive layer (13) of each of said parts (7) and (8) is longer than the corresponding layer (14) and extends to said slot (6), and further comprising means for bringing said part (8) and its corresponding conductive layer (13) to a potential whose value is substantially twice the value of the potential of the other part (7) of the first metallic plate (2) and its corresponding electrically conductive layer (13), and means for bringing the second metallic plate (3) and both of the other electrically conductive layers (14) to a substantially zero potential.
References Cited (Backward Citations)
US3821664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |