US4841530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cr-doped scandium borate laser
Assignee: United States Department of Energy
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Filing: 1986-03-27
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Granted: 1989-06-20
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Expires: 2006-03-27
Abstract
Abstract A broadly wavelength-tunable laser is provided which comprises as the laser medium a single crystal of MBO 3 :Cr 3+ , where M is selected from the group of Sc, In and Lu. The laser may be operated over a broad temperature range from cryogenic temperatures to elevated temperatures. Emission is in a spectral range from red to infrared, and the laser is useful in the fields of defense, communications, isotope separation, photochemistry, etc.
Inventors
- 👤 Bruce H. Chai
- 👤 Shui T. Lai
- 👤 Margaret N. Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:39
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/09; H01S3/091; H01S3/10; H01S3/106; H01S3/1601; H01S3/162; H01S3/1623
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
40 words
A laser comprising: a laser medium comprising a single crystal of MBO 3 :Cr 3+ , where M is selected from the group consisting of scandium, indium and lutetium; and means for exciting the laser medium to emit coherent radiation.
Claim 2
Dependent Claim
40 words
A laser comprising: a laser medium comprising a single crystal of MBO 3 :Cr 3+ , where M is selected from the group consisting of scandium, indium and lutetium; and means for exciting the laser medium to emit coherent radiation.
Claim 3
Dependent Claim
16 words
The laser of claim 1 in which the laser medium is ScBO 3 :Cr 3+ .
Claim 4
Dependent Claim
27 words
The laser of claim 1 in which the laser medium is substantially in the shape of a cylindrical rod whose long dimension is along the cylinder axis.
Claim 5
Dependent Claim
31 words
The laser of claim 1 in which the laser medium is substantially in the shape of a slab having a substantially rectangular cross-section in a plane normal to its long dimension.
Claim 6
Dependent Claim
29 words
The laser of claim 1 in which the Cr 3+ concentration is in the range between about 0.005 and about 20 atom percent with respect to M octahedral sites.
Claim 7
Dependent Claim
28 words
The laser of claim 1 in which the means for exciting the laser medium comprises a pulsed incoherent light source emitting at wavelengths shorter than about 730 nm.
Claim 8
Dependent Claim
28 words
The laser of claim 1 in which the means for exciting the laser medium comprises a continuous incoherent light source emitting at wavelengths shorter than about 730 nm.
Claim 9
Dependent Claim
28 words
The laser of claim 1 in which the means for exciting the laser medium comprises a pulsed coherent light source emitting at wavelengths shorter than about 730 nm.
Claim 10
Dependent Claim
28 words
The laser of claim 1 in which the means for exciting the laser medium comprises a continuous coherent light source emitting at wavelengths shorter than about 730 nm.
Claim 11
Dependent Claim
12 words
The laser of claim 1 further comprising means for Q-switching the laser.
Claim 12
Dependent Claim
16 words
The laser of claim 1 further comprising means for controlling the temperature of the laser medium.
Claim 13
Dependent Claim
24 words
The laser of claim 1 further comprising means for tuning the coherent radiation in a range of about 778 nm to about 892 nm.
Claim 14
Dependent Claim
27 words
The laser of claim 2 in which the laser medium is substantially in the shape of a cylindrical rod whose long dimension is along the cylinder axis.
Claim 15
Dependent Claim
29 words
The laser of claim 2 in which the Cr 3+ concentration is in the range between about 0.005 and about 20 atom percent with respect to scandium octahedral sites.
Claim 16
Dependent Claim
74 words
The laser of claim 2 in which the means for exciting the laser medium comprises one of (a) a pulsed incoherent light source emitting at wavelengths shorter than about 730 nm, (b) a continuous incoherent light source emitting at wavelengths shorter than about 730 nm, (c) a pulsed coherent light source emitting at wavelengths shorter than about 730 nm and (d) a continuous coherent light source emitting at wavelengths shorter than about 730 nm.
Claim 17
Dependent Claim
12 words
The laser of claim 2 further comprising means for Q-switching the laser.
Claim 18
Dependent Claim
16 words
The laser of claim 2 further comprising means for controlling the temperature of the laser medium.
Claim 19
Dependent Claim
41 words
The laser of claim 2 wherein said laser is capable of generating coherent radiation in a range of about 778 nm to about 892 nm, and further comprising means for tuning the coherent radiation to a specified value in said range.
References Cited (Backward Citations)
US4272733A
Cited
US4490822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |