US3852684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser device comprising a compound oscillator and amplifier for generating the fundamental mode
Assignee: Siemens AG
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Filing: 1973-04-04
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Granted: 1974-12-03
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Expires: 1993-04-04
Abstract
Abstract In a laser device for generating a laser beam of a fundamental mode having an oscillator portion and an amplifying portion characterized by the pair of mirrors forming the resonator of the oscillator being dimensioned to utilize only a portion of the laser active material and matching optical systems arranged with the laser active material for directing a beam decoupled from the resonator back through the laser active material for amplification of the beam.
Inventors
- 👤 D Roess
- 👤 G Ziedler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:34
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/23; H01S3/2308; H01S3/05; H01S3/06; H01S3/08; H01S3/081; H01S3/10; H01S3/106; H01S3/08059; H01S3/08063; H01S3/2325; H01S3/2333
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
A laser device for generating and amplifying a laser of a fundamental mode, comprising a body of laser active material, an optical resonator including a pair of mirrors with the body of laser active material being positioned therebetween, said pair of mirrors having their cross sectional dimension less than the cross sectional dimension of the laser active material so that only a portion of the laser active material coacts with the pair of mirrors to form a fundamental mode oscillator with the remaining portion of the body of material being an amplifier portion, one of said pair of mirrors being partially transparent to decouple a beam from the resonator, and means being positioned to receive the beam decoupled from the resonator through the one mirror and to direct the decoupled beam through the amplifier portion of the laser active material for amplification of the beam.
Claim 2
Dependent Claim
145 words
A laser device for generating and amplifying a laser of a fundamental mode, comprising a body of laser active material, an optical resonator including a pair of mirrors with the body of laser active material being positioned therebetween, said pair of mirrors having their cross sectional dimension less than the cross sectional dimension of the laser active material so that only a portion of the laser active material coacts with the pair of mirrors to form a fundamental mode oscillator with the remaining portion of the body of material being an amplifier portion, one of said pair of mirrors being partially transparent to decouple a beam from the resonator, and means being positioned to receive the beam decoupled from the resonator through the one mirror and to direct the decoupled beam through the amplifier portion of the laser active material for amplification of the beam.
Claim 3
Dependent Claim
61 words
A laser device according to claim 1, wherein the body of laser active material is a rod of homogeneous structure having an axis, said pair of mirrors being positioned on said axis of the rod so that an axial portion of the rod forms the fundamental mode oscillator and the coaxial surrounding remaining portion of the rod forms the amplifier portion.
Claim 4
Dependent Claim
20 words
A laser device according to claim 2, wherein the pair of mirrors are plane mirrors and form a plane-parallel resonator.
Claim 5
Dependent Claim
114 words
A laser device according to claim 3, wherein the means comprises a condenser lens and a convex mirror, said condenser lens has a pair of parallel flat faces of a cross sectional size corresponding to the cross sectional dimensions of the mirrors of the plane-parallel resonator and is positioned adjacent the one mirror with the faces axially aligned with the rod so that a beam decoupled through the one mirror passes through the plane faces of the lens, said convex mirror being positioned to receive a decoupled beam passing through the parallel faces of the lens and to reflect the beam back through the lens and the amplifier portion of the laser active material.
Claim 6
Dependent Claim
58 words
A laser device according to claim 3, wherein the means comprises a light transmitting body having a convex surface on which the one mirror of the pair of mirrors is provided, said light transmitting body being provided on a second surface with a convex mirror for reflecting light decoupled by the one mirror back through the amplifier portion.
Claim 7
Dependent Claim
33 words
A laser device according to claim 2, wherein the two mirrors forming the resonator are two confocal mirrors and the resonator has a Fresnel number having a magnitude in the order of one.
Claim 8
Dependent Claim
29 words
A laser device according to claim 6, wherein the means includes a mirror for reflecting light emitted by the one mirror of the resonator back through the amplifier portion.
Claim 9
Dependent Claim
66 words
A laser device according to claim 1, wherein the means comprises a pair of spaced concave mirrors with the optical resonator disposed therebetween so that the pair of concave mirrors reflect the light beam decoupled through the one mirror of the resonator through the amplifier portion of the body of laser active material at least two times prior to decoupling of the beam from the device.
References Cited (Backward Citations)
US3622907A
Cited
US3753147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |