Patent US4945544A successfully refreshed from Google Patents.
US4945544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode laser pumped solid-state laser
Assignee: Rohm Co Ltd
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Filing: 1989-03-28
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Granted: 1990-07-31
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Expires: 2009-03-28
Abstract
Abstract A solid-state laser comprises a columnar laser rod having a central longitudinal axis, a total reflection mirror arranged coaxially of the laser rod in facing relation to one end face thereof, and a half mirror arranged coaxially of the laser rod in facing relation to the other end face thereof. The pumping light is emitted from a plurality of laser diodes arranged in an array laterally spaced from the laser rod in parallel thereto. A cylindrical lens arranged between the laser rod and the array of laser diodes serves to focus the emitted pumping light on the central longitudinal axis of the laser rod. The active substance in the laser rod is excited by the thus focused pumping light to generate a laser beam axially of the laser rod.
Inventors
- 👤 Haruo Tanaka
- 👤 Naotaroh Nakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:24
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/094; H01S3/0941
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A solid-state laser comprising: a laser rod having a central longitudinal axis; a total reflection mirror arranged on the extension of said longitudinal axis in facing relation to one end face of said laser rod; a half mirror arranged on the extension of said longitudinal axis in facing relation to the other end face of said laser rod; a plurality of laser diodes arranged in an array which is spaced laterally from said laser rod in parallel to said longitudinal axis, said array of laser diodes emitting pumping light toward said laser rod; and a cylindrical lens arranged in parallel to said longitudinal axis between said laser rod and said array of laser diodes, said lens serving to focus said pumping light from said array of laser diodes substantially on said longitudinal axis to generate efficiently a laser beam along said longitudinal axis within said laser rod.
Claim 2
Dependent Claim
147 words
A solid-state laser comprising: a laser rod having a central longitudinal axis; a total reflection mirror arranged on the extension of said longitudinal axis in facing relation to one end face of said laser rod; a half mirror arranged on the extension of said longitudinal axis in facing relation to the other end face of said laser rod; a plurality of laser diodes arranged in an array which is spaced laterally from said laser rod in parallel to said longitudinal axis, said array of laser diodes emitting pumping light toward said laser rod; and a cylindrical lens arranged in parallel to said longitudinal axis between said laser rod and said array of laser diodes, said lens serving to focus said pumping light from said array of laser diodes substantially on said longitudinal axis to generate efficiently a laser beam along said longitudinal axis within said laser rod.
Claim 3
Dependent Claim
17 words
The solid-state laser as defined in claim 1, wherein said laser rod is made of neodymium-doped yttrium-aluminum-garnet.
Claim 4
Dependent Claim
17 words
The solid-state laser as defined in claim 1, wherein said laser rod is made of neodymium glass.
Claim 5
Dependent Claim
19 words
The solid-state laser as defined in claim 1, wherein said laser rod is made of neodymium-doped lithium yttrium fluoride.
Claim 6
Dependent Claim
14 words
The solid-state laser as defined in claim 1, wherein said laser rod is columnar.
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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |