Patent US4229713A successfully refreshed from Google Patents.
US4229713A
Expired / Lapsed
US
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Stoichiometric rare earth laser material and laser based thereon
Assignee: Verizon Laboratories Inc
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Filing: 1978-12-14
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Granted: 1980-10-21
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Expires: 1998-12-14
Abstract
Abstract A high gain stoichiometric neodymium laser medium of the general formula K 5 Nd x M.sub.(1-x) Li 2 F 10 where x takes on a non-zero positive value less than or equal to one, and M is a metal selected from the group consisting of lanthanum, cerium, and gadolinium. Minilasers employing a laser medium of the general formula K 5 Nd x M.sub.(1-x) Li 2 F 10 are provided in which the optical pumping is provided by at least one light emitting diode or laser diode.
Inventors
- 👤 Bill C. McCollum
- 👤 Alexander Lempicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:24
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/1688; H01S3/1601; H01S3/1603; H01S3/1611
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
35 words
An active laser medium comprising a stoichiometric single crystal compound of the general formula: K.sub.5 Nd.sub.x M.sub.(1-x) Li.sub.2 F.sub.10 (0<x≦1) where M is a metal selected from the group consisting of lanthanum, cerium, and gadolinium.
Claim 2
Dependent Claim
35 words
An active laser medium comprising a stoichiometric single crystal compound of the general formula: K.sub.5 Nd.sub.x M.sub.(1-x) Li.sub.2 F.sub.10 (0<x≦1) where M is a metal selected from the group consisting of lanthanum, cerium, and gadolinium.
Claim 3
Dependent Claim
9 words
The active laser medium of claim 1 wherein 0.01≦x<1.
Claim 4
Dependent Claim
11 words
The active laser medium of claim 2 wherein M is lanthanum.
Claim 5
Dependent Claim
11 words
The active laser medium of claim 2 wherein M is cerium.
Claim 6
Dependent Claim
11 words
The active laser medium of claim 2 wherein M is gadolinium.
Claim 7
Dependent Claim
37 words
An active laser medium consisting of a stoichiometric single crystal compound of the formula K 5 NdLi 2 F 10 characterized by a temperature dependent luminescence lifetime having a value of about 300 microseconds at room temperature.
Claim 8
Dependent Claim
37 words
An active laser medium consisting of a stoichiometric single crystal compound of the formula K 5 NdLi 2 F 10 characterized by a temperature dependent luminescence lifetime having a value of about 300 microseconds at room temperature.
Claim 9
Dependent Claim
82 words
A laser comprising in combination: an optical resonance cavity defined by a first totally reflective mirror and a second partially transmissive mirror, an active laser medium within said cavity, said medium comprising a stoichiometric single crystal compound of the general formula K.sub.5 Nd.sub.x M.sub.(1-x) Li.sub.2 F.sub.10 (0<x≦1) wherein M is a metal selected from the group consisting of lanthanum, cerium, and gadolinium, and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation.
Claim 10
Dependent Claim
82 words
A laser comprising in combination: an optical resonance cavity defined by a first totally reflective mirror and a second partially transmissive mirror, an active laser medium within said cavity, said medium comprising a stoichiometric single crystal compound of the general formula K.sub.5 Nd.sub.x M.sub.(1-x) Li.sub.2 F.sub.10 (0<x≦1) wherein M is a metal selected from the group consisting of lanthanum, cerium, and gadolinium, and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation.
Claim 11
Dependent Claim
8 words
The laser according to claim 7 wherein 0.01≦x<1.
Claim 12
Dependent Claim
10 words
The laser according to claim 8 wherein M is lanthanum.
Claim 13
Dependent Claim
10 words
The laser according to claim 8 wherein M is cerium.
Claim 14
Dependent Claim
10 words
The laser according to claim 8 wherein M is gadolinium.
Claim 15
Dependent Claim
20 words
The laser according to claim 7 wherein said active laser medium consists of K 5 NdLi 2 F 10 .
Claim 16
Dependent Claim
18 words
The laser according to claim 7 wherein said optical pumping means comprises at least one light emitting diode.
Claim 17
Dependent Claim
17 words
The laser according to claim 7 wherein said optical pumping means comprises at least one laser diode.
Claim 18
Dependent Claim
29 words
The laser according to claim 7 wherein said first totally reflective mirror and said second partially transmissive mirror comprise reflective coatings on opposite surfaces of said active laser medium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |