US4648094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium (3+) doped germanate garnets as active media for tunable solid state lasers
Assignee: Verizon Laboratories Inc
•
Filing: 1986-06-26
•
Granted: 1987-03-03
•
Expires: 2006-06-26
Abstract
Abstract A laser medium containing a chromium (3+) doped germanate garnet represented by the general formula: Ca 3 M 2 (1-x) Cr 2x (GeO 4 ) 3 wherein M is Al 3+ , Ga 3+ , Sc 3+ , Lu 3+ , or Y 3+ and 0<x≦0.25 is disclosed. A laser employing the above-described laser medium is also described.
Inventors
- 👤 Bill C. McCollum
- 👤 Peter T. Kenyon
- 👤 Leonard J. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:40
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/05; H01S3/08; H01S3/081; H01S3/082
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
27 words
A laser medium comprising a chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Sc 3+ , and 0<X≦0.25.
Claim 2
Dependent Claim
27 words
A laser medium comprising a chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Sc 3+ , and 0<X≦0.25.
Claim 3
Dependent Claim
27 words
A laser medium comprising a chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Lu 3+ , and 0<X≦0.25.
Claim 4
Dependent Claim
27 words
A laser medium comprising a chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Lu 3+ , and 0<X≦0.25.
Claim 5
Dependent Claim
27 words
A laser medium comprising a chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Y 3+ , and 0<X≦0.25.
Claim 6
Dependent Claim
27 words
A laser medium comprising a chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Y 3+ , and 0<X≦0.25.
Claim 7
Dependent Claim
13 words
A laser medium in accordance with claims 1, 2, or 3 wherein 0<x≦0.10.
Claim 8
Dependent Claim
73 words
A laser comprising: 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 chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Sc 3+ , and 0<X≦0.25; and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation.
Claim 9
Dependent Claim
73 words
A laser comprising: 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 chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Sc 3+ , and 0<X≦0.25; and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation.
Claim 10
Dependent Claim
73 words
A laser comprising: 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 chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Lu 3+ , and 0<X≦0.25; and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit simulated radiation.
Claim 11
Dependent Claim
73 words
A laser comprising: 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 chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Lu 3+ , and 0<X≦0.25; and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit simulated radiation.
Claim 12
Dependent Claim
73 words
A laser comprising: 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 chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Y 3+ , and 0<X≦0.25; and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation.
Claim 13
Dependent Claim
73 words
A laser comprising: 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 chromium (3+) doped germanate garnet crystal of the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Y 3+ , and 0<X≦0.25; and an optical pumping means disposed adjacent to said optical cavity for exciting said laser medium to emit stimulated radiation.
Claim 14
Dependent Claim
13 words
A laser medium in accordance with claims 5, 6, or 7 wherein 0<x≦0.10.
Claim 15
Dependent Claim
23 words
A laser medium in accordance with claims 5, 6 or 7 wherein said optical pumping mean comprising at least one light emitting diode.
Claim 16
Dependent Claim
33 words
A laser in accordance with claims 5, 6 or 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) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |