US3979696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser pumping cavity with polycrystalline powder coating
Assignee: Raytheon Co
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Filing: 1975-06-30
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Granted: 1976-09-07
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Expires: 1995-06-30
Abstract
Abstract A coating consisting of polycrystalline Sm 2 O 3 powder dispersed in a Na 2 SiO 3 or K 2 SiO 3 binder may be provided on either the inner or outer lateral surface of a substantially tubular pumping cavity housing member for a Nd:YAG laser. The coating is absorptive of radiation at the lasing wavelength of about 1.06 μm and has a thickness sufficient to provide a high diffuse reflectivity for pumping radiation.
Inventors
- 👤 William W. Buchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:16
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/093; H01S3/10; H01S3/11; H01S3/1123; H01S3/115
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
A laser pumping arrangement comprising: a rod of laser material, a light source optically coupled to said rod for emitting pumping radiation to establish population inversion in said laser material between a pair of energy levels such that said rod emits laser radiation at a lasing wavelength corresponding to the energy difference between said energy levels; a housing member laterally surrounding said rod and said light source; and a coating on a lateral surface of said housing member, said coating including a polycrystalline powder absorptive of radiation at said lasing wavelength and having a thickness sufficient to provide a high diffuse reflectivity for said pumping radiation.
Claim 2
Dependent Claim
106 words
A laser pumping arrangement comprising: a rod of laser material, a light source optically coupled to said rod for emitting pumping radiation to establish population inversion in said laser material between a pair of energy levels such that said rod emits laser radiation at a lasing wavelength corresponding to the energy difference between said energy levels; a housing member laterally surrounding said rod and said light source; and a coating on a lateral surface of said housing member, said coating including a polycrystalline powder absorptive of radiation at said lasing wavelength and having a thickness sufficient to provide a high diffuse reflectivity for said pumping radiation.
Claim 3
Dependent Claim
22 words
An arrangement according to claim 1 wherein said laser material is Nd:YAG and said polycrystalline powder is Sm 2 O 3 .
Claim 4
Dependent Claim
20 words
An arrangement according to claim 2 wherein said coating has a thickness of from about 5 to about 20 mils.
Claim 5
Dependent Claim
24 words
An arrangement according to claim 1 wherein said polycrystalline powder is dispersed in a binder adhering to said lateral surface of said housing member.
Claim 6
Dependent Claim
41 words
An arrangement according to claim 4 wherein said laser material is Nd:YAG, said polycrystalline powder is Sm 2 O 3 , and said binder is selected from the group consisting of Na 2 SiO 3 and K 2 SiO 3 .
Claim 7
Dependent Claim
37 words
An arrangement according to claim 4 wherein said housing member is transparent to said pumping radiation and to radiation at said lasing wavelength, and said coating is disposed on the outer lateral surface of said housing member.
Claim 8
Dependent Claim
40 words
An arrangement according to claim 6 wherein said laser material is Nd:YAG, said polycrystalline powder is Sm 2 O 3 , said binder is selected from the group consisting of Na 2 SiO 3 and K 2 SiO 3 .
Claim 9
Dependent Claim
20 words
An arrangement according to claim 7 wherein said coating has a thickness of from about 5 to about 20 mils.
Claim 10
Dependent Claim
30 words
An arrangement according to claim 4 wherein said housing member is of a substantially tubular configuration, and said coating is disposed on the inner lateral surface of said housing member.
Claim 11
Dependent Claim
41 words
An arrangement according to claim 9 wherein said laser material is Nd:YAG, said polycrystalline powder is Sm 2 O 3 , and said binder is selected from the group consisting of Na 2 SiO 3 and K 2 SiO 3 .
Claim 12
Dependent Claim
20 words
An arrangement according to claim 10 wherein said coating has a thickness of from about 5 to about 20 mils.
Claim 13
Dependent Claim
138 words
A laser pumping arrangement comprising: a rod of laser material, a light source optically coupled to said rod for emitting pumping radiation to establish population inversion in said laser material between a pair of energy levels such that said rod emits laser radiation at a lasing wavelength corresponding to the energy difference between said energy levels; a first substantially tubular housing member transparent to said pumping radiation and to radiation at said lasing wavelength laterally surrounding said rod and said light source; a second substantially tubular housing member coaxially disposed about and spaced slightly from said first housing member; and a layer of polycrystalline powder packed between said first and second housing members, said powder being absorptive of radiation at said lasing wavelength and having a thickness sufficient to provide a high diffuse reflectivity for said pumping radiation.
Claim 14
Dependent Claim
138 words
A laser pumping arrangement comprising: a rod of laser material, a light source optically coupled to said rod for emitting pumping radiation to establish population inversion in said laser material between a pair of energy levels such that said rod emits laser radiation at a lasing wavelength corresponding to the energy difference between said energy levels; a first substantially tubular housing member transparent to said pumping radiation and to radiation at said lasing wavelength laterally surrounding said rod and said light source; a second substantially tubular housing member coaxially disposed about and spaced slightly from said first housing member; and a layer of polycrystalline powder packed between said first and second housing members, said powder being absorptive of radiation at said lasing wavelength and having a thickness sufficient to provide a high diffuse reflectivity for said pumping radiation.
Claim 15
Dependent Claim
22 words
An arrangement according to claim 12 wherein said laser material is Nd:YAG and said polycrystalline powder is Sm 2 O 3 .
Claim 16
Dependent Claim
20 words
An arrangement according to claim 13 wherein said layer has a thickness of from about 5 to about 20 mils.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |