US3928816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Far infrared waveguide laser
Assignee: United States Department of the Air Force
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Filing: 1974-06-12
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Granted: 1975-12-23
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Expires: 1994-06-12
Abstract
Abstract A far infrared (FIR) laser is provided which uses a dielectric or metal tube waveguide resonator. A CO2 or CO waveguide laser is utilized to pump the FIR laser.
Inventors
- 👤 Thomas S Hartwick
- 👤 Jr Dean T Hodges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/0315
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A far infrared laser being comprised of a hollow waveguide resonator of preselected length and inner diameter in accordance with the infrared wavelength in the region from 50 Mu m to * 1000 Mu m and having first and second ends, a first and second mirror for said first and seCond ends, each of said mirrors having a hole of preselected dimension therein, first and second windows sealing said holes in said first and second mirrors, respectively, said first window and said first mirror, in first combination sealing said first end, said second window and said second mirror, in second combination, sealing said second end, a preselected active laser medium in said hollow waveguide resonator, means to establish a preselected pressure in said hollow waveguide resonator, and laser pump means to optically excite said preselected active laser medium by way of said first combination to provide output radiation by way of said second combination.
Claim 2
Dependent Claim
154 words
A far infrared laser being comprised of a hollow waveguide resonator of preselected length and inner diameter in accordance with the infrared wavelength in the region from 50 Mu m to * 1000 Mu m and having first and second ends, a first and second mirror for said first and seCond ends, each of said mirrors having a hole of preselected dimension therein, first and second windows sealing said holes in said first and second mirrors, respectively, said first window and said first mirror, in first combination sealing said first end, said second window and said second mirror, in second combination, sealing said second end, a preselected active laser medium in said hollow waveguide resonator, means to establish a preselected pressure in said hollow waveguide resonator, and laser pump means to optically excite said preselected active laser medium by way of said first combination to provide output radiation by way of said second combination.
Claim 3
Dependent Claim
34 words
A far infrared laser as described in claim 1 wherein said hollow waveguide resonator consists of a preselected dielectric material, said preselected length being 70 cm and said preselected inner diameter being 9 mm.
Claim 4
Dependent Claim
34 words
A far infrared laser as described in claim 1 wherein said hollow waveguide resonator consists of a preselected metallic material, said preselected length being 70 cm and said preselected inner diameter being 10 mm.
Claim 5
Dependent Claim
43 words
A far infrared laser as described in claim 1 wherein said preselected active laser medium is comprised of CH3OH and said hollow waveguide resonator consists of gold-coated brass material, said preselected length and inner diameter thereof being 70 cm and 10 mm, respectively.
Claim 6
Dependent Claim
29 words
A far infrared laser as described in claim 4 wherein said first and second windows are comprised of quartz, said holes therethrough having a preselected dimension of 2.5 mm.
Claim 7
Dependent Claim
37 words
A far infrared laser as described in claim 5 wherein said laser pump means is comprised of a CO2 waveguide laser with the power output of said far infrared laser varying linearly with the laser pump power.
References Cited (Backward Citations)
US3493892A
Cited
US3628174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |