US3660779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Athermalization of laser rods
Assignee: American Optical Corp
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Filing: 1970-01-02
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Granted: 1972-05-02
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Expires: 1990-01-02
Abstract
Abstract A cone of 90* vertex or a Brewster angle cone is disposed coaxially with a cylinder and laser rod, the cylinder having an internal reflective surface, for discriminating against radially polarized components of the laser light. An alternative embodiment discriminates against tangentially polarized light by disposing a Brewster angle cone co-axially with the rod and uses another cone as the retroreflective element for the laser system. In any of the embodiments, a 90* Faraday rotator may be used to change the polarization of the mode conserved.
Inventors
- 👤 David W Cuff
- 👤 Paul G De Baryshe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:25
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/08072
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A laser system using a laser rod as the active element thereof for producing beams of light comprising: an absorbtive cone co-axial with said rod, and a hollow cylinder being co-axial with said cone and rod and having a reflective inside surface, said cone reflecting tangentially polarized components of said light incident to it and directing them to the inside surface of said cylinder and absorbing radially polarized components of light incident to it, and the inside surface of said cylinder providing a retroreflective element for said system and reflecting said tangentially polarized components back to said cone for reflection toward said rod.
Claim 2
Dependent Claim
103 words
A laser system using a laser rod as the active element thereof for producing beams of light comprising: an absorbtive cone co-axial with said rod, and a hollow cylinder being co-axial with said cone and rod and having a reflective inside surface, said cone reflecting tangentially polarized components of said light incident to it and directing them to the inside surface of said cylinder and absorbing radially polarized components of light incident to it, and the inside surface of said cylinder providing a retroreflective element for said system and reflecting said tangentially polarized components back to said cone for reflection toward said rod.
Claim 3
Dependent Claim
38 words
The invention according to claim 1 wherein a 90* Faraday rotator is disposed between said cone and said rod for rotating said tangentially polarized components and propagating them as radially polarized components to said rod from said cone.
Claim 4
Dependent Claim
14 words
The invention according to claim 2 wherein said cone is a 90* vertex cone.
Claim 5
Dependent Claim
115 words
A laser system using a laser rod as the active element thereof for producing beams of light comprising: a Brewster angle cone co-axial with said rod, and another cone co-axial with said Brewster angle cone and said rod, said Brewster angle cone reflecting tangentially polarized components of said light incident to it and refracting radially polarized components of said light incident to it to said other cone, said other cone having a vertex angle such as to provide normal incidence for said radially polarized components incident to said other cone, said other cone providing a retroreflective element for said system and reflecting said radially polarized components back through said Brewster angle cone to said rod.
Claim 6
Dependent Claim
115 words
A laser system using a laser rod as the active element thereof for producing beams of light comprising: a Brewster angle cone co-axial with said rod, and another cone co-axial with said Brewster angle cone and said rod, said Brewster angle cone reflecting tangentially polarized components of said light incident to it and refracting radially polarized components of said light incident to it to said other cone, said other cone having a vertex angle such as to provide normal incidence for said radially polarized components incident to said other cone, said other cone providing a retroreflective element for said system and reflecting said radially polarized components back through said Brewster angle cone to said rod.
Claim 7
Dependent Claim
41 words
The invention according to claim 4 wherein a 90* Faraday rotator is disposed between said Brewster angle cone and said rod for rotating said radially polarized components and propagating them as tangentially polarized components to said rod from said other cone.
Claim 8
Dependent Claim
113 words
A laser system using a laser rod as the active element thereof for producing beams of light comprising: a homogenizing cone disposed co-axially with said rod and having a reflective base providing a retroreflective element for said system for receiving light from said rod on its conical surface on one side of its axis thereby reflecting a first polarized component of said light out of said system and refracting a second polarized component of said light to said back surface, from where said second polarized component of said light is reflected to the conical surface on the other side of the axis of said cone for propagation from said cone to said rod.
Claim 9
Dependent Claim
113 words
A laser system using a laser rod as the active element thereof for producing beams of light comprising: a homogenizing cone disposed co-axially with said rod and having a reflective base providing a retroreflective element for said system for receiving light from said rod on its conical surface on one side of its axis thereby reflecting a first polarized component of said light out of said system and refracting a second polarized component of said light to said back surface, from where said second polarized component of said light is reflected to the conical surface on the other side of the axis of said cone for propagation from said cone to said rod.
Claim 10
Dependent Claim
37 words
The invention according to claim 6 wherein said cone is a Brewster angle cone and light incident thereon from said rod has its tangentially polarized components reflected and its radially polarized components refracted to said back surface.
Claim 11
Dependent Claim
38 words
The invention according to claim 7 wherein a 90* Faraday rotator is disposed between said cone and said rod for rotating said radially polarized components and propagating them as tangentially polarized components to said rod from said cone.
References Cited (Backward Citations)
US3283262A
Cited
US3484714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |