Patent US196234A successfully refreshed from Google Patents.
Patent US4823348A successfully refreshed from Google Patents.
US4823348A
Expired / Lapsed
US
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Laser stabilization device
Assignee: Optra Inc
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Filing: 1988-08-18
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Granted: 1989-04-18
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Expires: 2008-08-18
Abstract
Abstract Frequency stabilization is disclosed for a laser device, wherein the laser tube is provided with end mirrors which are mounted in extensions at the respective ends of the laser tube. The laser tube extensions have reduced sections which are movable to allow adjustment of the end mirrors in the laser device. The reduced sections are preferably made of metallic material. The means to stabilize frequency provided is the application of heat or current or both to and around a reduced metallic section in the laser tube extension. This may be accomplished by the passing of current through a wire wrapped around the reduced metallic section. The passing of such current causes the reduced metallic section to contract and expand along an axis in line with the laser tube, and as well as a magnetic field is induced upon the gaseous medium within the laser tube. By such means controlled by suitable circuitry, laser frequency stabilization is accomplished. The means provided may be mounted on commercially available laser devices.
Inventors
- 👤 Michael Hercher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:10
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/13; H01S3/139
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
195 words
A frequency stabilized laser comprising: an elongated laser tube having two ends, said laser tube having contained therein a gaseous medium, at least two oppositely disposed and facing mirrors within said laser tube, means to excite said medium in said laser tube so as to cause resonance of electromagnetic energy therein; said at least two mirrors being disposed a distance apart, said distance corresponding to a multiple of the wavelength of said electromagnetic energy resonating in said laser tube when excited by said means to excite, thereby defining the optical and physical length of said laser tue; at least one of said ends having an elongated extension extending from said at least one end and generally in the direction of elongation of said laser tube; at least one of said mirrors being disposed and fixed within said elongated extension; said elongated extension having a reduced section disposed between said at least one of said mirrors and said at least one of said ends; means for adjusting at least one of the said optical or the said physical length of said laser tube, said adjustment means being applied to said reduced section of said elongated extension.
Claim 2
Dependent Claim
195 words
A frequency stabilized laser comprising: an elongated laser tube having two ends, said laser tube having contained therein a gaseous medium, at least two oppositely disposed and facing mirrors within said laser tube, means to excite said medium in said laser tube so as to cause resonance of electromagnetic energy therein; said at least two mirrors being disposed a distance apart, said distance corresponding to a multiple of the wavelength of said electromagnetic energy resonating in said laser tube when excited by said means to excite, thereby defining the optical and physical length of said laser tue; at least one of said ends having an elongated extension extending from said at least one end and generally in the direction of elongation of said laser tube; at least one of said mirrors being disposed and fixed within said elongated extension; said elongated extension having a reduced section disposed between said at least one of said mirrors and said at least one of said ends; means for adjusting at least one of the said optical or the said physical length of said laser tube, said adjustment means being applied to said reduced section of said elongated extension.
Claim 3
Dependent Claim
36 words
The frequency stabilized laser device of claim 1 wherein the said adjustment means applied to said reduced section of said elongated extension adjusts both the said optical and the said physical length of said laser tube.
Claim 4
Dependent Claim
81 words
The frequency stabilized laser device of claim 1 wherein the means for adjusting the said physical length of said laser tube comprises means for applying heat to said reduced section of said at least one elongated extension such that upon heating said extension is caused to extend in a direction generally in the direction of elongation of said laser tube, thereby causing movement of said at least one mirror and a change in said distance between said at least two mirrors.
Claim 5
Dependent Claim
41 words
The frequency stabilized laser device of claim 3 wherein at least a portion of said reduced section of said elongated extension is composed of a metallic material and wherein said means for applying heat is applied to heat said metallic material.
Claim 6
Dependent Claim
38 words
The frequency stabilized laser device of claim 1 wherein the means for adjusting the said optical length of said laser tube comprises means for applying a solenoidal magnetic field induction to said reduced section of said elongated extension.
Claim 7
Dependent Claim
43 words
The frequency stabilized laser device of claim 1 wherein the said means for adjusting comprises a single directionally wound resistance wire wound around said reduced section of said elongated extension and adapted for the reception of an electric current passing through said wire.
Claim 8
Dependent Claim
48 words
The frequency stabilized laser device of claim 1 wherein the said means for adjusting comprises a single directionally wound resistance wire wound around said reduced section of said elongated extension, said wire being adapted for heating of said elongated extension by an electric current passing through said wire.
Claim 9
Dependent Claim
55 words
The frequency stabilized laser device of claim 1 wherein the said means for adjusting comprises a single directionally wound resistance wire wound around said reduced section of said elongated extension, said wire being adapted for inducing a solenoidal magnetic field on said medium in said laser tube by an electric current passing through said wire.
Claim 10
Dependent Claim
62 words
The frequency stabilized laser device of claim 1 wherein the said means for adjusting comprises a single directionally wound resistance wire wound around said reduced section of said elongated extension, said wire being adapted for heating of said elongated extension and for inducing a solenoidal magnetic field on said medium in said laser tube by an electric current passing through said wire.
Claim 11
Dependent Claim
45 words
The frequency stabilized laser device of claim 7, further comprising a thermally conducting material disposed about at least a portion of said wire, whereby heat transfer from said wire to said reduced section of said elongated extension is uniformly distributed by said thermally conducting material.
Claim 12
Dependent Claim
43 words
The frequency stabilized laser device of claim 1 wherein the said means for adjusting comprises a resistance wire wound in opposite directions around said reduced section of said elongated extension and adapted for the reception of an electric current passing through said wire.
Claim 13
Dependent Claim
48 words
The frequency stabilized laser device of claim 1 wherein the said means for adjusting comprises a resistance wire wound in opposite directions around said reduced section of said elongated extension, said wire being adapted for heating of said elongated extension by an electric current passing through said wire.
Claim 14
Dependent Claim
45 words
The frequency stabilized laser device of claim 12, further comprising a thermally conducting material disposed about at least a portion of said wire, whereby heat transfer from said wire to said reduced section of said elongated extension is uniformly distributed by said thermally conducting material.
Claim 15
Dependent Claim
100 words
An attached for a laser device to stabilize the operation of a laser, and in which the laser device comprises a laser tube extending in a longitudinal direction, said laser tube having on at least one end thereof a portion extending in said longitudinal direction and containing therein a mirror, said extending portion having a reduced section, said reduced section being disposed between said at least one end and said mirror, said attachment comprising means for heating said reduced section of said extending portion wherein, upon heating said reduced section of said extending portion will extend in said longitudinal direction.
Claim 16
Dependent Claim
100 words
An attached for a laser device to stabilize the operation of a laser, and in which the laser device comprises a laser tube extending in a longitudinal direction, said laser tube having on at least one end thereof a portion extending in said longitudinal direction and containing therein a mirror, said extending portion having a reduced section, said reduced section being disposed between said at least one end and said mirror, said attachment comprising means for heating said reduced section of said extending portion wherein, upon heating said reduced section of said extending portion will extend in said longitudinal direction.
Claim 17
Dependent Claim
39 words
The attachment for a laser device as claimed in claim 14, in which said means for heating comprises a resistance wire disposed around said extending portion and adapted to be heated by an electric current passing through said wire.
Claim 18
Dependent Claim
90 words
An attachment for a laser device to stabilize the operation of a laser, and in which the laser device comprises a laser tube extending in a longitudinal direction, said laser tue having on at least one end thereof a portion extending in said longitudinal direction and containing therein a mirror, said extending portion having a reduced section, said reduced section being disposed between said at least one end and said mirror, said attachment comprising means for applying a solenoidal magnetic field induction to said reduced section of said extending portion.
Claim 19
Dependent Claim
90 words
An attachment for a laser device to stabilize the operation of a laser, and in which the laser device comprises a laser tube extending in a longitudinal direction, said laser tue having on at least one end thereof a portion extending in said longitudinal direction and containing therein a mirror, said extending portion having a reduced section, said reduced section being disposed between said at least one end and said mirror, said attachment comprising means for applying a solenoidal magnetic field induction to said reduced section of said extending portion.
Claim 20
Dependent Claim
47 words
The attachment for a laser device as claimed in claim 16, in which said means for applying a solenoidal-magnetic field induction comprises a resistance wire disposed around said reduced section of said extending portion and adapted to be heated by an electric current passing through said wire.
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |