US3582820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erbium laser device
Assignee: American Optical Corp
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Filing: 1968-04-29
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Granted: 1971-06-01
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Expires: 1988-04-29
Abstract
Abstract A laser device comprised of first and second laser cavities having a trivalent neodymium-doped laser rod positioned within said first laser cavity, and a trivalent ytterbium-trivalent erbium-doped laser rod within said second laser cavity. Coupled to said first cavity is a flash tube for producing a state of population inversion within said neodymium-doped rod and the resulting laser energy at 1.06 or 0.92 microns is directed into said ytterbium-erbium rod within said second cavity to produce a state of population inversion within said erbium ions to produce laser energy at 1.5 microns which is coupled from said second cavity to the exterior for utilization.
Inventors
- 👤 Elias Snitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:38
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602; H01S3/0615; H01S3/08; H01S3/08095; H01S3/14; H01S3/16; H01S3/0606; H01S3/061; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/094; H01S3/094038; H01S3/1601; H01S3/1603; H01S3/1608; H01S3/1611
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
42 words
A laser device according to claim 1, in which the means for coupling comprises a dichroic filter which is slightly transmissive to light energy having a wavelength of 1.06 microns and totally reflective to light energy having a wavelength of 1.5 microns.
Claim 2
Dependent Claim
67 words
A laser device according to claim 2, in which the first resonant laser cavity is defined by a totally reflective means and the dichroic filter, the second resonant cavity being defined by the dichroic filter and a second dichroic filter which is slightly transmissive to light energy having a wavelength of 1.5 microns and is substantially totally reflective to light energy having a wavelength of 1.06 microns.
Claim 3
Dependent Claim
22 words
A laser device according to claim 3 in which the first and second resonant cavities are aligned along a common optical axis.
Claim 4
Dependent Claim
91 words
A laser device according to claim 1, in which the axis of the neodymium-doped laser rod is at an angle of approximately 45* to the axis of the ytterbium-erbium-doped laser rod and the first resonant laser cavity is defined by a pair of reflective elements, one of which is totally reflective to light energy at a wavelength of 1.06 microns and the other of which is slightly transmissive to such light energy so as to couple such light energy from the first resonant laser cavity to the second resonant laser cavity.
Claim 5
Dependent Claim
94 words
A laser device according to claim 5, in which the ytterbium-erbium-doped laser rod has a 45* roof formed on the end thereof which is adjacent the first resonant laser cavity, the roof being formed so as to have one face normal to the direction of propagation of the 1.06 micron wavelength light energy, an element which is totally reflective to light energy at a wavelength of 1.06 microns is disposed parallel to the other face of the roof, and the length of the ytterbium-erbium-doped laser rod is an integral multiple of the diameter thereof.
Claim 6
Dependent Claim
63 words
A laser device according to claim 6 in which the second resonant laser cavity is defined by the roof on the ytterbium-erbium-doped laser rod and a reflective element which is slightly transmissive to light energy at 1.5 microns wavelength, the element being disposed adjacent the other end of the ytterbium-erbium-doped laser rod to emit the 1.5 microns wavelength light energy from the device.
Claim 7
Dependent Claim
54 words
A laser device according to claim 5, in which the ytterbium-erbium-doped laser rod has an entrance face formed on the End thereof adjacent the first resonant laser cavity which is at a 45* angle to the axis of the rod and normal to the direction of propagation of the 1.06 micron wavelength light energy.
Claim 8
Dependent Claim
102 words
A laser device according to claim 8, in which the second resonant laser cavity is defined by an element which is totally reflective to light energy at a wavelength of 1.5 microns and an element which is slightly transmissive to light energy at 1.5 microns wavelength, the totally reflective element being disposed parallel to the axis of the ytterbium-erbium-doped laser and at a 45* angle to the entrance face so as to be normal to the direction of propagation of light energy reflected by the entrance face, and the other element being disposed adjacent the other end of the ytterbium-erbium-doped laser rod.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |