Patent US4377864A successfully refreshed from Google Patents.
US4377864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium (III) ordered perovskite lasers and media therefor
Assignee: GRTE LABORATORIES INCORPORATED A CORP OF DE
•
Filing: 1981-08-10
•
Granted: 1983-03-22
•
Expires: 2001-08-10
Abstract
Abstract A laser medium includes an ordered perovskite crystal of the general formula: A 2 B Cr y B' 1-y X 6 . A and B are alkali metal ions with the ionic radius of A greater than B. B' is an ion selected from the group consisting of Y 3+ , La 3+ , Gd 3+ , Lu 3+ , Sc 3+ , Al 3+ , Ga 3+ , and In 3+ . X is an ion selected from the group consisting of F - , Cl - , and Br - . A can be an ion selected from the group consisting of K + , Na + ,Cs + , and Rb + . B can be an ion selected from the group consisting of K +- , Na + , and Li + . The chromium can be represented by Cr +3 ions. The laser media can be ordered perovskite polycrystalline compounds of the formulae: CsNaCr 0 .01 Y 0 .99 Cl 6 ; KLi Cr y Sc 1-y F 6 (where y equals 0.01 and 0.10); K 2 NaCr y Sc 1-y F 6 (where 0.01 ≦y≦0.40). A laser can include an optical resonant cavity defined by a first totally reflective mirror and a second partially transmissive mirror. Within the cavity is an active laser medium comprising an ordered perovskite crystal of the general formula stated above, and may be of a specific formula as stated above. An optical pumping means is disposed adjacent to the optical cavity for exciting the laser medium to stimulated radiation. The mirrors are provided with reflective coatings on opposite surfaces of the active laser medium.
Inventors
- 👤 Bill C. McCollum
- 👤 Leonard J. Andrews
- 👤 Alexander Lempicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:20
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/1688; H01S3/1601; H01S3/162; H01S3/1623
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
88 words
A laser medium comprising an ordered perovskite crystal of the general formula: A.sub.2 BCr.sub.y B'.sub.1-y X.sub.6 where A and B are alkali metal ions with an ionic radius of A greater than B; B' is an ion selected from the group consisting of Y 3+ , La 3+ , Gd 3+ , Lu 3+ , Sc 3+ , Al 3+ , Ga 3+ , and In 3+ ; and X is an ion selected from the group consisting of F - , Cl - and Br - .
Claim 2
Dependent Claim
88 words
A laser medium comprising an ordered perovskite crystal of the general formula: A.sub.2 BCr.sub.y B'.sub.1-y X.sub.6 where A and B are alkali metal ions with an ionic radius of A greater than B; B' is an ion selected from the group consisting of Y 3+ , La 3+ , Gd 3+ , Lu 3+ , Sc 3+ , Al 3+ , Ga 3+ , and In 3+ ; and X is an ion selected from the group consisting of F - , Cl - and Br - .
Claim 3
Dependent Claim
53 words
The lasers medium as recited in claim 1 wherein A is an ion selected from the group consisting of K + , Na + , Cs + , and Rb + ; and B is an ion selected from the group consisting of K + , Na + , and Li + .
Claim 4
Dependent Claim
17 words
The laser medium as recited in claim 1 wherein the chromium is represented by Cr +3 ions.
Claim 5
Dependent Claim
12 words
The laser medium as recited in claim 1 wherein A is potassium.
Claim 6
Dependent Claim
12 words
The laser medium as recited in claim 1 wherein B is lithium.
Claim 7
Dependent Claim
12 words
The laser medium as recited in claim 1 wherein B is sodium.
Claim 8
Dependent Claim
16 words
A laser medium comprising an ordered perovskite polycrystalline compound of the formula: Cs.sub.2 NaCr.sub.0.01 Y.sub.0.99 Cl.sub.6.
Claim 9
Dependent Claim
16 words
A laser medium comprising an ordered perovskite polycrystalline compound of the formula: Cs.sub.2 NaCr.sub.0.01 Y.sub.0.99 Cl.sub.6.
Claim 10
Dependent Claim
20 words
A laser medium comprising an ordered perovskite polycrystalline compound of the formula: K.sub.2 LiCr.sub.y Sc.sub.1-y F.sub.6, where y=0.01 and 0.10.
Claim 11
Dependent Claim
20 words
A laser medium comprising an ordered perovskite polycrystalline compound of the formula: K.sub.2 LiCr.sub.y Sc.sub.1-y F.sub.6, where y=0.01 and 0.10.
Claim 12
Dependent Claim
18 words
A laser medium comprising an ordered perovskite polycrystalline compound of the formula: K.sub.2 NaCr.sub.y Sc.sub.1-y F.sub.6, where 0.01≦y≦0.40.
Claim 13
Dependent Claim
18 words
A laser medium comprising an ordered perovskite polycrystalline compound of the formula: K.sub.2 NaCr.sub.y Sc.sub.1-y F.sub.6, where 0.01≦y≦0.40.
Claim 14
Dependent Claim
174 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 an ordered perovskite crystal of the general formula: A.sub.2 BCr.sub.y B'.sub.1-y X.sub.6 where A and B are alkali metal ions with the ionic radius of A greater than B; B' is an ion selected from the group consisting of Y 3+ , La 3+ , Gd 3+ , Lu 3+ , Sc 3+ , Al 3+ , Ga 3+ , and In 3+ ; and X is an ion selected from the group consisting of F - , Cl - , and Br - , and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation, wherein chromium is represented by Cr 3+ ions, wherein A is an ion selected from the group consisting of potassium, sodium, cesium, and rubidium; and B is selected from the group consisting of potassium, sodium, and lithium.
Claim 15
Dependent Claim
174 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 an ordered perovskite crystal of the general formula: A.sub.2 BCr.sub.y B'.sub.1-y X.sub.6 where A and B are alkali metal ions with the ionic radius of A greater than B; B' is an ion selected from the group consisting of Y 3+ , La 3+ , Gd 3+ , Lu 3+ , Sc 3+ , Al 3+ , Ga 3+ , and In 3+ ; and X is an ion selected from the group consisting of F - , Cl - , and Br - , and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation, wherein chromium is represented by Cr 3+ ions, wherein A is an ion selected from the group consisting of potassium, sodium, cesium, and rubidium; and B is selected from the group consisting of potassium, sodium, and lithium.
Claim 16
Dependent Claim
32 words
The laser as recited in claim 10 where said active laser medium is an ordered perovskite polycrystalline compound of the formula Cs 2 NaCr 0 .01 Y 0 .99 Cl 6 .
Claim 17
Dependent Claim
34 words
The laser as recited in claim 10 wherein said active laser medium is an ordered perovskite polycrystalline compound of the formula K 2 LiCr y Sc 1-y F 6 , where y=0.01 and 0.10.
Claim 18
Dependent Claim
32 words
The laser as recited in claim 10 wherein said active laser medium is an ordered perovskite polycrystalline compound of the formula K 2 NaCr y Cs 1-y F 6 , where 0.01≦y≦0.40.
Claim 19
Dependent Claim
19 words
The laser as recited in claim 10 wherein said optical pumping means comprises at least one light emitting diode.
Claim 20
Dependent Claim
30 words
The laser as recited in claim 10 wherein said first totally reflective mirror and said second partially transmissive mirror comprises 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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |